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modebar tools are not accessible #6645

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Closed
modebar tools are not accessible#6645
Labels
P2considered for next cyclebugsomething broken

Description

@warrickball
warrickball
opened on Jun 15, 2023

I'm currently working in a small team on a Django website that has an embedded Plotly Dash. We're working through accessibility issues raised by pa11y-ci and have identified a few that are arising from within Plotly.js itself.

Here's the minimal example I set up based on the "getting started" example code on the Plotly.js website:

<!DOCTYPE html><htmllang=en><head><title>Plotly.js Minimal Working Example</title><scriptsrc="https://cdn.plot.ly/plotly-latest.min.js"></script></head><body><divid="tester" style="width:600px;height:250px;"></div><script>TESTER=document.getElementById('tester');Plotly.newPlot(TESTER,[{x: [1,2,3,4,5],y: [1,2,4,8,16]}]);</script></body></html>

I served this using a simple Python server:

$ python3 -m http.server 8500 --bind 127.0.0.1 &

and run pa11y-ci with this configuration:

$ cat .pa11yci
{
"defaults": {
"runners": ["axe", "htmlcs"],
"chromeLaunchConfig": {
"args": ["--no-sandbox"]
}
},
"urls": [
"http://127.0.0.1:8500/plotly-mwe.html"
]
}

which produces a number of issues (full log collapsed below), several of which look like this:

$ npx pa11y-ci
Running Pa11y on 1 URLs:
127.0.0.1 - - [15/Jun/2023 15:40:27] "GET /plotly-mwe.html HTTP/1.1" 200 -
> http://127.0.0.1:8500/plotly-mwe.html - 22 errors
Errors in http://127.0.0.1:8500/plotly-mwe.html:
...
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(1) > a)
<a rel="tooltip" class="modebar-btn" data-title="Download plot as a png" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
...
✘ 0/1 URLs passed

There's one of these for each of the tooltips, presumably because they have neither id nor name attributes.

I'm not sure what the most appopriate id or name attribute would be.

Full error log
$ npx pa11y-ci
Running Pa11y on 1 URLs:
127.0.0.1 - - [15/Jun/2023 15:40:27] "GET /plotly-mwe.html HTTP/1.1" 200 -
> http://127.0.0.1:8500/plotly-mwe.html - 22 errors
Errors in http://127.0.0.1:8500/plotly-mwe.html:
• Page must have means to bypass repeated blocks (https://dequeuniversity.com/rules/axe/4.7/bypass?application=axeAPI)
(html)
<html lang="en"><head> <title>Plotly.js Min...</html>
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(1) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="1" data-math="N" transform="translate(105.75,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(2) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="2" data-math="N" transform="translate(202.87,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(3) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="3" data-math="N" transform="translate(300,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity: 1;
white-space: pre;...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(4) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="4" data-math="N" transform="translate(397.12,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(5) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="5" data-math="N" transform="translate(494.25,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(1) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="0" data-math="N" transform="translate(0,166.45)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; wh...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(2) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="5" data-math="N" transform="translate(0,147.95)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; wh...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(3) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="10" data-math="N" transform="translate(0,129.45)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; w...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(4) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="15" data-math="N" transform="translate(0,110.95)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; w...
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(1) > a)
<a rel="tooltip" class="modebar-btn" data-title="Download plot as a png" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(1))
<a rel="tooltip" class="modebar-btn active" data-title="Zoom" data-attr="dragmode" data-val="zoom" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(2))
<a rel="tooltip" class="modebar-btn" data-title="Pan" data-attr="dragmode" data-val="pan" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(3))
<a rel="tooltip" class="modebar-btn" data-title="Box Select" data-attr="dragmode" data-val="select" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(4))
<a rel="tooltip" class="modebar-btn" data-title="Lasso Select" data-attr="dragmode" data-val="lasso" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1031 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(1))
<a rel="tooltip" class="modebar-btn" data-title="Zoom in" data-attr="zoom" data-val="in" data-toggle="false" data-gravity="n"><svg viewBox="0 0 875 1000" cla...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(2))
<a rel="tooltip" class="modebar-btn" data-title="Zoom out" data-attr="zoom" data-val="out" data-toggle="false" data-gravity="n"><svg viewBox="0 0 875 1000" cla...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(3))
<a rel="tooltip" class="modebar-btn" data-title="Autoscale" data-attr="zoom" data-val="auto" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(4))
<a rel="tooltip" class="modebar-btn" data-title="Reset axes" data-attr="zoom" data-val="reset" data-toggle="false" data-gravity="n"><svg viewBox="0 0 928.6 1000" c...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(4) > a:nth-child(1))
<a rel="tooltip" class="modebar-btn" data-title="Toggle Spike Lines" data-attr="_cartesianSpikesEnabled" data-val="on" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(4) > a:nth-child(2))
<a rel="tooltip" class="modebar-btn" data-title="Show closest data on hover" data-attr="hovermode" data-val="closest" data-toggle="false" data-gravity="ne"><svg viewBox="0 0 1500 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(4) > a:nth-child(3))
<a rel="tooltip" class="modebar-btn active" data-title="Compare data on hover" data-attr="hovermode" data-val="x" data-toggle="false" data-gravity="ne"><svg viewBox="0 0 1125 1000" cl...</a>
✘ 0/1 URLs passed

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modebar tools are not accessible · Issue #6645 · plotly/plotly.js · GitHub
      Skip to content
      modebar tools are not accessible #6645
      Closed
      Closed
      modebar tools are not accessible#6645
      Labels
      P2considered for next cyclebugsomething broken
      Description
      @warrickball
      warrickball
      opened on Jun 15, 2023
      I'm currently working in a small team on a Django website that has an embedded Plotly Dash. We're working through accessibility issues raised by pa11y-ci and have identified a few that are arising from within Plotly.js itself.
      Here's the minimal example I set up based on the "getting started" example code on the Plotly.js website:
      <!DOCTYPE html><htmllang=en><head><title>Plotly.js Minimal Working Example</title><scriptsrc="https://cdn.plot.ly/plotly-latest.min.js"></script></head><body><divid="tester" style="width:600px;height:250px;"></div><script>TESTER=document.getElementById('tester');Plotly.newPlot(TESTER,[{x: [1,2,3,4,5],y: [1,2,4,8,16]}]);</script></body></html>
      I served this using a simple Python server:
      $ python3 -m http.server 8500 --bind 127.0.0.1 &

      and run pa11y-ci with this configuration:
      $ cat .pa11yci
{
"defaults": {
"runners": ["axe", "htmlcs"],
"chromeLaunchConfig": {
"args": ["--no-sandbox"]
}
},
"urls": [
"http://127.0.0.1:8500/plotly-mwe.html"
]
}

      which produces a number of issues (full log collapsed below), several of which look like this:
      $ npx pa11y-ci
Running Pa11y on 1 URLs:
127.0.0.1 - - [15/Jun/2023 15:40:27] "GET /plotly-mwe.html HTTP/1.1" 200 -
> http://127.0.0.1:8500/plotly-mwe.html - 22 errors
Errors in http://127.0.0.1:8500/plotly-mwe.html:
...
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(1) > a)
<a rel="tooltip" class="modebar-btn" data-title="Download plot as a png" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
...
✘ 0/1 URLs passed

      There's one of these for each of the tooltips, presumably because they have neither id nor name attributes.
      I'm not sure what the most appopriate id or name attribute would be.
      Full error log
      $ npx pa11y-ci
Running Pa11y on 1 URLs:
127.0.0.1 - - [15/Jun/2023 15:40:27] "GET /plotly-mwe.html HTTP/1.1" 200 -
> http://127.0.0.1:8500/plotly-mwe.html - 22 errors
Errors in http://127.0.0.1:8500/plotly-mwe.html:
• Page must have means to bypass repeated blocks (https://dequeuniversity.com/rules/axe/4.7/bypass?application=axeAPI)
(html)
<html lang="en"><head> <title>Plotly.js Min...</html>
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(1) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="1" data-math="N" transform="translate(105.75,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(2) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="2" data-math="N" transform="translate(202.87,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(3) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="3" data-math="N" transform="translate(300,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity: 1;
white-space: pre;...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(4) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="4" data-math="N" transform="translate(397.12,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(5) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="5" data-math="N" transform="translate(494.25,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(1) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="0" data-math="N" transform="translate(0,166.45)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; wh...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(2) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="5" data-math="N" transform="translate(0,147.95)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; wh...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(3) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="10" data-math="N" transform="translate(0,129.45)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; w...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(4) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="15" data-math="N" transform="translate(0,110.95)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; w...
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(1) > a)
<a rel="tooltip" class="modebar-btn" data-title="Download plot as a png" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(1))
<a rel="tooltip" class="modebar-btn active" data-title="Zoom" data-attr="dragmode" data-val="zoom" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(2))
<a rel="tooltip" class="modebar-btn" data-title="Pan" data-attr="dragmode" data-val="pan" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(3))
<a rel="tooltip" class="modebar-btn" data-title="Box Select" data-attr="dragmode" data-val="select" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(4))
<a rel="tooltip" class="modebar-btn" data-title="Lasso Select" data-attr="dragmode" data-val="lasso" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1031 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(1))
<a rel="tooltip" class="modebar-btn" data-title="Zoom in" data-attr="zoom" data-val="in" data-toggle="false" data-gravity="n"><svg viewBox="0 0 875 1000" cla...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(2))
<a rel="tooltip" class="modebar-btn" data-title="Zoom out" data-attr="zoom" data-val="out" data-toggle="false" data-gravity="n"><svg viewBox="0 0 875 1000" cla...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(3))
<a rel="tooltip" class="modebar-btn" data-title="Autoscale" data-attr="zoom" data-val="auto" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(4))
<a rel="tooltip" class="modebar-btn" data-title="Reset axes" data-attr="zoom" data-val="reset" data-toggle="false" data-gravity="n"><svg viewBox="0 0 928.6 1000" c...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(4) > a:nth-child(1))
<a rel="tooltip" class="modebar-btn" data-title="Toggle Spike Lines" data-attr="_cartesianSpikesEnabled" data-val="on" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(4) > a:nth-child(2))
<a rel="tooltip" class="modebar-btn" data-title="Show closest data on hover" data-attr="hovermode" data-val="closest" data-toggle="false" data-gravity="ne"><svg viewBox="0 0 1500 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(4) > a:nth-child(3))
<a rel="tooltip" class="modebar-btn active" data-title="Compare data on hover" data-attr="hovermode" data-val="x" data-toggle="false" data-gravity="ne"><svg viewBox="0 0 1125 1000" cl...</a>
✘ 0/1 URLs passed

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modebar tools are not accessible · Issue #6645 · plotly/plotly.js · GitHub
          Skip to content
          modebar tools are not accessible #6645
          Closed
          Closed
          modebar tools are not accessible#6645
          Labels
          P2considered for next cyclebugsomething broken
          Description
          @warrickball
          warrickball
          opened on Jun 15, 2023
          I'm currently working in a small team on a Django website that has an embedded Plotly Dash. We're working through accessibility issues raised by pa11y-ci and have identified a few that are arising from within Plotly.js itself.
          Here's the minimal example I set up based on the "getting started" example code on the Plotly.js website:
          <!DOCTYPE html><htmllang=en><head><title>Plotly.js Minimal Working Example</title><scriptsrc="https://cdn.plot.ly/plotly-latest.min.js"></script></head><body><divid="tester" style="width:600px;height:250px;"></div><script>TESTER=document.getElementById('tester');Plotly.newPlot(TESTER,[{x: [1,2,3,4,5],y: [1,2,4,8,16]}]);</script></body></html>
          I served this using a simple Python server:
          $ python3 -m http.server 8500 --bind 127.0.0.1 &

          and run pa11y-ci with this configuration:
          $ cat .pa11yci
{
"defaults": {
"runners": ["axe", "htmlcs"],
"chromeLaunchConfig": {
"args": ["--no-sandbox"]
}
},
"urls": [
"http://127.0.0.1:8500/plotly-mwe.html"
]
}

          which produces a number of issues (full log collapsed below), several of which look like this:
          $ npx pa11y-ci
Running Pa11y on 1 URLs:
127.0.0.1 - - [15/Jun/2023 15:40:27] "GET /plotly-mwe.html HTTP/1.1" 200 -
> http://127.0.0.1:8500/plotly-mwe.html - 22 errors
Errors in http://127.0.0.1:8500/plotly-mwe.html:
...
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(1) > a)
<a rel="tooltip" class="modebar-btn" data-title="Download plot as a png" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
...
✘ 0/1 URLs passed

          There's one of these for each of the tooltips, presumably because they have neither id nor name attributes.
          I'm not sure what the most appopriate id or name attribute would be.
          Full error log
          $ npx pa11y-ci
Running Pa11y on 1 URLs:
127.0.0.1 - - [15/Jun/2023 15:40:27] "GET /plotly-mwe.html HTTP/1.1" 200 -
> http://127.0.0.1:8500/plotly-mwe.html - 22 errors
Errors in http://127.0.0.1:8500/plotly-mwe.html:
• Page must have means to bypass repeated blocks (https://dequeuniversity.com/rules/axe/4.7/bypass?application=axeAPI)
(html)
<html lang="en"><head> <title>Plotly.js Min...</html>
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(1) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="1" data-math="N" transform="translate(105.75,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(2) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="2" data-math="N" transform="translate(202.87,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(3) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="3" data-math="N" transform="translate(300,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity: 1;
white-space: pre;...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(4) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="4" data-math="N" transform="translate(397.12,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(5) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="5" data-math="N" transform="translate(494.25,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(1) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="0" data-math="N" transform="translate(0,166.45)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; wh...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(2) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="5" data-math="N" transform="translate(0,147.95)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; wh...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(3) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="10" data-math="N" transform="translate(0,129.45)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; w...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(4) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="15" data-math="N" transform="translate(0,110.95)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; w...
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(1) > a)
<a rel="tooltip" class="modebar-btn" data-title="Download plot as a png" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(1))
<a rel="tooltip" class="modebar-btn active" data-title="Zoom" data-attr="dragmode" data-val="zoom" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(2))
<a rel="tooltip" class="modebar-btn" data-title="Pan" data-attr="dragmode" data-val="pan" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(3))
<a rel="tooltip" class="modebar-btn" data-title="Box Select" data-attr="dragmode" data-val="select" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(4))
<a rel="tooltip" class="modebar-btn" data-title="Lasso Select" data-attr="dragmode" data-val="lasso" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1031 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(1))
<a rel="tooltip" class="modebar-btn" data-title="Zoom in" data-attr="zoom" data-val="in" data-toggle="false" data-gravity="n"><svg viewBox="0 0 875 1000" cla...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(2))
<a rel="tooltip" class="modebar-btn" data-title="Zoom out" data-attr="zoom" data-val="out" data-toggle="false" data-gravity="n"><svg viewBox="0 0 875 1000" cla...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(3))
<a rel="tooltip" class="modebar-btn" data-title="Autoscale" data-attr="zoom" data-val="auto" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(4))
<a rel="tooltip" class="modebar-btn" data-title="Reset axes" data-attr="zoom" data-val="reset" data-toggle="false" data-gravity="n"><svg viewBox="0 0 928.6 1000" c...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(4) > a:nth-child(1))
<a rel="tooltip" class="modebar-btn" data-title="Toggle Spike Lines" data-attr="_cartesianSpikesEnabled" data-val="on" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(4) > a:nth-child(2))
<a rel="tooltip" class="modebar-btn" data-title="Show closest data on hover" data-attr="hovermode" data-val="closest" data-toggle="false" data-gravity="ne"><svg viewBox="0 0 1500 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(4) > a:nth-child(3))
<a rel="tooltip" class="modebar-btn active" data-title="Compare data on hover" data-attr="hovermode" data-val="x" data-toggle="false" data-gravity="ne"><svg viewBox="0 0 1125 1000" cl...</a>
✘ 0/1 URLs passed

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, 'i');
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modebar tools are not accessible · Issue #6645 · plotly/plotly.js · GitHub
              Skip to content
              modebar tools are not accessible #6645
              Closed
              Closed
              modebar tools are not accessible#6645
              Labels
              P2considered for next cyclebugsomething broken
              Description
              @warrickball
              warrickball
              opened on Jun 15, 2023
              I'm currently working in a small team on a Django website that has an embedded Plotly Dash. We're working through accessibility issues raised by pa11y-ci and have identified a few that are arising from within Plotly.js itself.
              Here's the minimal example I set up based on the "getting started" example code on the Plotly.js website:
              <!DOCTYPE html><htmllang=en><head><title>Plotly.js Minimal Working Example</title><scriptsrc="https://cdn.plot.ly/plotly-latest.min.js"></script></head><body><divid="tester" style="width:600px;height:250px;"></div><script>TESTER=document.getElementById('tester');Plotly.newPlot(TESTER,[{x: [1,2,3,4,5],y: [1,2,4,8,16]}]);</script></body></html>
              I served this using a simple Python server:
              $ python3 -m http.server 8500 --bind 127.0.0.1 &

              and run pa11y-ci with this configuration:
              $ cat .pa11yci
{
"defaults": {
"runners": ["axe", "htmlcs"],
"chromeLaunchConfig": {
"args": ["--no-sandbox"]
}
},
"urls": [
"http://127.0.0.1:8500/plotly-mwe.html"
]
}

              which produces a number of issues (full log collapsed below), several of which look like this:
              $ npx pa11y-ci
Running Pa11y on 1 URLs:
127.0.0.1 - - [15/Jun/2023 15:40:27] "GET /plotly-mwe.html HTTP/1.1" 200 -
> http://127.0.0.1:8500/plotly-mwe.html - 22 errors
Errors in http://127.0.0.1:8500/plotly-mwe.html:
...
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(1) > a)
<a rel="tooltip" class="modebar-btn" data-title="Download plot as a png" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
...
✘ 0/1 URLs passed

              There's one of these for each of the tooltips, presumably because they have neither id nor name attributes.
              I'm not sure what the most appopriate id or name attribute would be.
              Full error log
              $ npx pa11y-ci
Running Pa11y on 1 URLs:
127.0.0.1 - - [15/Jun/2023 15:40:27] "GET /plotly-mwe.html HTTP/1.1" 200 -
> http://127.0.0.1:8500/plotly-mwe.html - 22 errors
Errors in http://127.0.0.1:8500/plotly-mwe.html:
• Page must have means to bypass repeated blocks (https://dequeuniversity.com/rules/axe/4.7/bypass?application=axeAPI)
(html)
<html lang="en"><head> <title>Plotly.js Min...</html>
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(1) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="1" data-math="N" transform="translate(105.75,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(2) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="2" data-math="N" transform="translate(202.87,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(3) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="3" data-math="N" transform="translate(300,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity: 1;
white-space: pre;...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(4) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="4" data-math="N" transform="translate(397.12,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(5) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="5" data-math="N" transform="translate(494.25,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(1) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="0" data-math="N" transform="translate(0,166.45)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; wh...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(2) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="5" data-math="N" transform="translate(0,147.95)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; wh...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(3) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="10" data-math="N" transform="translate(0,129.45)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; w...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(4) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="15" data-math="N" transform="translate(0,110.95)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; w...
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(1) > a)
<a rel="tooltip" class="modebar-btn" data-title="Download plot as a png" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(1))
<a rel="tooltip" class="modebar-btn active" data-title="Zoom" data-attr="dragmode" data-val="zoom" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(2))
<a rel="tooltip" class="modebar-btn" data-title="Pan" data-attr="dragmode" data-val="pan" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(3))
<a rel="tooltip" class="modebar-btn" data-title="Box Select" data-attr="dragmode" data-val="select" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(4))
<a rel="tooltip" class="modebar-btn" data-title="Lasso Select" data-attr="dragmode" data-val="lasso" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1031 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(1))
<a rel="tooltip" class="modebar-btn" data-title="Zoom in" data-attr="zoom" data-val="in" data-toggle="false" data-gravity="n"><svg viewBox="0 0 875 1000" cla...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(2))
<a rel="tooltip" class="modebar-btn" data-title="Zoom out" data-attr="zoom" data-val="out" data-toggle="false" data-gravity="n"><svg viewBox="0 0 875 1000" cla...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(3))
<a rel="tooltip" class="modebar-btn" data-title="Autoscale" data-attr="zoom" data-val="auto" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(4))
<a rel="tooltip" class="modebar-btn" data-title="Reset axes" data-attr="zoom" data-val="reset" data-toggle="false" data-gravity="n"><svg viewBox="0 0 928.6 1000" c...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(4) > a:nth-child(1))
<a rel="tooltip" class="modebar-btn" data-title="Toggle Spike Lines" data-attr="_cartesianSpikesEnabled" data-val="on" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(4) > a:nth-child(2))
<a rel="tooltip" class="modebar-btn" data-title="Show closest data on hover" data-attr="hovermode" data-val="closest" data-toggle="false" data-gravity="ne"><svg viewBox="0 0 1500 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(4) > a:nth-child(3))
<a rel="tooltip" class="modebar-btn active" data-title="Compare data on hover" data-attr="hovermode" data-val="x" data-toggle="false" data-gravity="ne"><svg viewBox="0 0 1125 1000" cl...</a>
✘ 0/1 URLs passed

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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
cleanLinks();
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1) {
if (node.tagName === 'A') cleanLinks();
node.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
modebar tools are not accessible · Issue #6645 · plotly/plotly.js · GitHub
                  Skip to content
                  modebar tools are not accessible #6645
                  Closed
                  Closed
                  modebar tools are not accessible#6645
                  Labels
                  P2considered for next cyclebugsomething broken
                  Description
                  @warrickball
                  warrickball
                  opened on Jun 15, 2023
                  I'm currently working in a small team on a Django website that has an embedded Plotly Dash. We're working through accessibility issues raised by pa11y-ci and have identified a few that are arising from within Plotly.js itself.
                  Here's the minimal example I set up based on the "getting started" example code on the Plotly.js website:
                  <!DOCTYPE html><htmllang=en><head><title>Plotly.js Minimal Working Example</title><scriptsrc="https://cdn.plot.ly/plotly-latest.min.js"></script></head><body><divid="tester" style="width:600px;height:250px;"></div><script>TESTER=document.getElementById('tester');Plotly.newPlot(TESTER,[{x: [1,2,3,4,5],y: [1,2,4,8,16]}]);</script></body></html>
                  I served this using a simple Python server:
                  $ python3 -m http.server 8500 --bind 127.0.0.1 &

                  and run pa11y-ci with this configuration:
                  $ cat .pa11yci
{
"defaults": {
"runners": ["axe", "htmlcs"],
"chromeLaunchConfig": {
"args": ["--no-sandbox"]
}
},
"urls": [
"http://127.0.0.1:8500/plotly-mwe.html"
]
}

                  which produces a number of issues (full log collapsed below), several of which look like this:
                  $ npx pa11y-ci
Running Pa11y on 1 URLs:
127.0.0.1 - - [15/Jun/2023 15:40:27] "GET /plotly-mwe.html HTTP/1.1" 200 -
> http://127.0.0.1:8500/plotly-mwe.html - 22 errors
Errors in http://127.0.0.1:8500/plotly-mwe.html:
...
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(1) > a)
<a rel="tooltip" class="modebar-btn" data-title="Download plot as a png" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
...
✘ 0/1 URLs passed

                  There's one of these for each of the tooltips, presumably because they have neither id nor name attributes.
                  I'm not sure what the most appopriate id or name attribute would be.
                  Full error log
                  $ npx pa11y-ci
Running Pa11y on 1 URLs:
127.0.0.1 - - [15/Jun/2023 15:40:27] "GET /plotly-mwe.html HTTP/1.1" 200 -
> http://127.0.0.1:8500/plotly-mwe.html - 22 errors
Errors in http://127.0.0.1:8500/plotly-mwe.html:
• Page must have means to bypass repeated blocks (https://dequeuniversity.com/rules/axe/4.7/bypass?application=axeAPI)
(html)
<html lang="en"><head> <title>Plotly.js Min...</html>
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(1) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="1" data-math="N" transform="translate(105.75,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(2) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="2" data-math="N" transform="translate(202.87,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(3) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="3" data-math="N" transform="translate(300,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity: 1;
white-space: pre;...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(4) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="4" data-math="N" transform="translate(397.12,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(5) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="5" data-math="N" transform="translate(494.25,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(1) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="0" data-math="N" transform="translate(0,166.45)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; wh...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(2) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="5" data-math="N" transform="translate(0,147.95)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; wh...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(3) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="10" data-math="N" transform="translate(0,129.45)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; w...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(4) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="15" data-math="N" transform="translate(0,110.95)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; w...
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(1) > a)
<a rel="tooltip" class="modebar-btn" data-title="Download plot as a png" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(1))
<a rel="tooltip" class="modebar-btn active" data-title="Zoom" data-attr="dragmode" data-val="zoom" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(2))
<a rel="tooltip" class="modebar-btn" data-title="Pan" data-attr="dragmode" data-val="pan" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(3))
<a rel="tooltip" class="modebar-btn" data-title="Box Select" data-attr="dragmode" data-val="select" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(4))
<a rel="tooltip" class="modebar-btn" data-title="Lasso Select" data-attr="dragmode" data-val="lasso" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1031 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(1))
<a rel="tooltip" class="modebar-btn" data-title="Zoom in" data-attr="zoom" data-val="in" data-toggle="false" data-gravity="n"><svg viewBox="0 0 875 1000" cla...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(2))
<a rel="tooltip" class="modebar-btn" data-title="Zoom out" data-attr="zoom" data-val="out" data-toggle="false" data-gravity="n"><svg viewBox="0 0 875 1000" cla...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(3))
<a rel="tooltip" class="modebar-btn" data-title="Autoscale" data-attr="zoom" data-val="auto" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(4))
<a rel="tooltip" class="modebar-btn" data-title="Reset axes" data-attr="zoom" data-val="reset" data-toggle="false" data-gravity="n"><svg viewBox="0 0 928.6 1000" c...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(4) > a:nth-child(1))
<a rel="tooltip" class="modebar-btn" data-title="Toggle Spike Lines" data-attr="_cartesianSpikesEnabled" data-val="on" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(4) > a:nth-child(2))
<a rel="tooltip" class="modebar-btn" data-title="Show closest data on hover" data-attr="hovermode" data-val="closest" data-toggle="false" data-gravity="ne"><svg viewBox="0 0 1500 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(4) > a:nth-child(3))
<a rel="tooltip" class="modebar-btn active" data-title="Compare data on hover" data-attr="hovermode" data-val="x" data-toggle="false" data-gravity="ne"><svg viewBox="0 0 1125 1000" cl...</a>
✘ 0/1 URLs passed

                  Metadata
                  Metadata
                  Assignees
                  No one assigned
                    Labels
                    P2considered for next cyclebugsomething broken
                    Type
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                      Milestone
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                      Relationships
                      None yet
                      Development
                      No branches or pull requests
                      Issue actions
                      
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
}
// Try immediately
tryTheater();
// Try after navigation (SPA)
var lastUrl = location.href;
setInterval(function() {
if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
modebar tools are not accessible · Issue #6645 · plotly/plotly.js · GitHub
                      Skip to content
                      modebar tools are not accessible #6645
                      Closed
                      Closed
                      modebar tools are not accessible#6645
                      Labels
                      P2considered for next cyclebugsomething broken
                      Description
                      @warrickball
                      warrickball
                      opened on Jun 15, 2023
                      I'm currently working in a small team on a Django website that has an embedded Plotly Dash. We're working through accessibility issues raised by pa11y-ci and have identified a few that are arising from within Plotly.js itself.
                      Here's the minimal example I set up based on the "getting started" example code on the Plotly.js website:
                      <!DOCTYPE html><htmllang=en><head><title>Plotly.js Minimal Working Example</title><scriptsrc="https://cdn.plot.ly/plotly-latest.min.js"></script></head><body><divid="tester" style="width:600px;height:250px;"></div><script>TESTER=document.getElementById('tester');Plotly.newPlot(TESTER,[{x: [1,2,3,4,5],y: [1,2,4,8,16]}]);</script></body></html>
                      I served this using a simple Python server:
                      $ python3 -m http.server 8500 --bind 127.0.0.1 &

                      and run pa11y-ci with this configuration:
                      $ cat .pa11yci
{
"defaults": {
"runners": ["axe", "htmlcs"],
"chromeLaunchConfig": {
"args": ["--no-sandbox"]
}
},
"urls": [
"http://127.0.0.1:8500/plotly-mwe.html"
]
}

                      which produces a number of issues (full log collapsed below), several of which look like this:
                      $ npx pa11y-ci
Running Pa11y on 1 URLs:
127.0.0.1 - - [15/Jun/2023 15:40:27] "GET /plotly-mwe.html HTTP/1.1" 200 -
> http://127.0.0.1:8500/plotly-mwe.html - 22 errors
Errors in http://127.0.0.1:8500/plotly-mwe.html:
...
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(1) > a)
<a rel="tooltip" class="modebar-btn" data-title="Download plot as a png" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
...
✘ 0/1 URLs passed

                      There's one of these for each of the tooltips, presumably because they have neither id nor name attributes.
                      I'm not sure what the most appopriate id or name attribute would be.
                      Full error log
                      $ npx pa11y-ci
Running Pa11y on 1 URLs:
127.0.0.1 - - [15/Jun/2023 15:40:27] "GET /plotly-mwe.html HTTP/1.1" 200 -
> http://127.0.0.1:8500/plotly-mwe.html - 22 errors
Errors in http://127.0.0.1:8500/plotly-mwe.html:
• Page must have means to bypass repeated blocks (https://dequeuniversity.com/rules/axe/4.7/bypass?application=axeAPI)
(html)
<html lang="en"><head> <title>Plotly.js Min...</html>
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(1) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="1" data-math="N" transform="translate(105.75,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(2) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="2" data-math="N" transform="translate(202.87,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(3) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="3" data-math="N" transform="translate(300,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity: 1;
white-space: pre;...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(4) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="4" data-math="N" transform="translate(397.12,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(5) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="5" data-math="N" transform="translate(494.25,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(1) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="0" data-math="N" transform="translate(0,166.45)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; wh...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(2) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="5" data-math="N" transform="translate(0,147.95)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; wh...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(3) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="10" data-math="N" transform="translate(0,129.45)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; w...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(4) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="15" data-math="N" transform="translate(0,110.95)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; w...
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(1) > a)
<a rel="tooltip" class="modebar-btn" data-title="Download plot as a png" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(1))
<a rel="tooltip" class="modebar-btn active" data-title="Zoom" data-attr="dragmode" data-val="zoom" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(2))
<a rel="tooltip" class="modebar-btn" data-title="Pan" data-attr="dragmode" data-val="pan" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(3))
<a rel="tooltip" class="modebar-btn" data-title="Box Select" data-attr="dragmode" data-val="select" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(4))
<a rel="tooltip" class="modebar-btn" data-title="Lasso Select" data-attr="dragmode" data-val="lasso" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1031 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(1))
<a rel="tooltip" class="modebar-btn" data-title="Zoom in" data-attr="zoom" data-val="in" data-toggle="false" data-gravity="n"><svg viewBox="0 0 875 1000" cla...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(2))
<a rel="tooltip" class="modebar-btn" data-title="Zoom out" data-attr="zoom" data-val="out" data-toggle="false" data-gravity="n"><svg viewBox="0 0 875 1000" cla...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(3))
<a rel="tooltip" class="modebar-btn" data-title="Autoscale" data-attr="zoom" data-val="auto" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(4))
<a rel="tooltip" class="modebar-btn" data-title="Reset axes" data-attr="zoom" data-val="reset" data-toggle="false" data-gravity="n"><svg viewBox="0 0 928.6 1000" c...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(4) > a:nth-child(1))
<a rel="tooltip" class="modebar-btn" data-title="Toggle Spike Lines" data-attr="_cartesianSpikesEnabled" data-val="on" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(4) > a:nth-child(2))
<a rel="tooltip" class="modebar-btn" data-title="Show closest data on hover" data-attr="hovermode" data-val="closest" data-toggle="false" data-gravity="ne"><svg viewBox="0 0 1500 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(4) > a:nth-child(3))
<a rel="tooltip" class="modebar-btn active" data-title="Compare data on hover" data-attr="hovermode" data-val="x" data-toggle="false" data-gravity="ne"><svg viewBox="0 0 1125 1000" cl...</a>
✘ 0/1 URLs passed

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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
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observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
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(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
modebar tools are not accessible · Issue #6645 · plotly/plotly.js · GitHub
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                          modebar tools are not accessible #6645
                          Closed
                          Closed
                          modebar tools are not accessible#6645
                          Labels
                          P2considered for next cyclebugsomething broken
                          Description
                          @warrickball
                          warrickball
                          opened on Jun 15, 2023
                          I'm currently working in a small team on a Django website that has an embedded Plotly Dash. We're working through accessibility issues raised by pa11y-ci and have identified a few that are arising from within Plotly.js itself.
                          Here's the minimal example I set up based on the "getting started" example code on the Plotly.js website:
                          <!DOCTYPE html><htmllang=en><head><title>Plotly.js Minimal Working Example</title><scriptsrc="https://cdn.plot.ly/plotly-latest.min.js"></script></head><body><divid="tester" style="width:600px;height:250px;"></div><script>TESTER=document.getElementById('tester');Plotly.newPlot(TESTER,[{x: [1,2,3,4,5],y: [1,2,4,8,16]}]);</script></body></html>
                          I served this using a simple Python server:
                          $ python3 -m http.server 8500 --bind 127.0.0.1 &

                          and run pa11y-ci with this configuration:
                          $ cat .pa11yci
{
"defaults": {
"runners": ["axe", "htmlcs"],
"chromeLaunchConfig": {
"args": ["--no-sandbox"]
}
},
"urls": [
"http://127.0.0.1:8500/plotly-mwe.html"
]
}

                          which produces a number of issues (full log collapsed below), several of which look like this:
                          $ npx pa11y-ci
Running Pa11y on 1 URLs:
127.0.0.1 - - [15/Jun/2023 15:40:27] "GET /plotly-mwe.html HTTP/1.1" 200 -
> http://127.0.0.1:8500/plotly-mwe.html - 22 errors
Errors in http://127.0.0.1:8500/plotly-mwe.html:
...
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(1) > a)
<a rel="tooltip" class="modebar-btn" data-title="Download plot as a png" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
...
✘ 0/1 URLs passed

                          There's one of these for each of the tooltips, presumably because they have neither id nor name attributes.
                          I'm not sure what the most appopriate id or name attribute would be.
                          Full error log
                          $ npx pa11y-ci
Running Pa11y on 1 URLs:
127.0.0.1 - - [15/Jun/2023 15:40:27] "GET /plotly-mwe.html HTTP/1.1" 200 -
> http://127.0.0.1:8500/plotly-mwe.html - 22 errors
Errors in http://127.0.0.1:8500/plotly-mwe.html:
• Page must have means to bypass repeated blocks (https://dequeuniversity.com/rules/axe/4.7/bypass?application=axeAPI)
(html)
<html lang="en"><head> <title>Plotly.js Min...</html>
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(1) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="1" data-math="N" transform="translate(105.75,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(2) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="2" data-math="N" transform="translate(202.87,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(3) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="3" data-math="N" transform="translate(300,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity: 1;
white-space: pre;...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(4) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="4" data-math="N" transform="translate(397.12,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(5) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="5" data-math="N" transform="translate(494.25,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(1) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="0" data-math="N" transform="translate(0,166.45)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; wh...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(2) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="5" data-math="N" transform="translate(0,147.95)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; wh...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(3) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="10" data-math="N" transform="translate(0,129.45)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; w...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(4) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="15" data-math="N" transform="translate(0,110.95)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; w...
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(1) > a)
<a rel="tooltip" class="modebar-btn" data-title="Download plot as a png" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(1))
<a rel="tooltip" class="modebar-btn active" data-title="Zoom" data-attr="dragmode" data-val="zoom" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(2))
<a rel="tooltip" class="modebar-btn" data-title="Pan" data-attr="dragmode" data-val="pan" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(3))
<a rel="tooltip" class="modebar-btn" data-title="Box Select" data-attr="dragmode" data-val="select" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(4))
<a rel="tooltip" class="modebar-btn" data-title="Lasso Select" data-attr="dragmode" data-val="lasso" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1031 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(1))
<a rel="tooltip" class="modebar-btn" data-title="Zoom in" data-attr="zoom" data-val="in" data-toggle="false" data-gravity="n"><svg viewBox="0 0 875 1000" cla...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(2))
<a rel="tooltip" class="modebar-btn" data-title="Zoom out" data-attr="zoom" data-val="out" data-toggle="false" data-gravity="n"><svg viewBox="0 0 875 1000" cla...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(3))
<a rel="tooltip" class="modebar-btn" data-title="Autoscale" data-attr="zoom" data-val="auto" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(4))
<a rel="tooltip" class="modebar-btn" data-title="Reset axes" data-attr="zoom" data-val="reset" data-toggle="false" data-gravity="n"><svg viewBox="0 0 928.6 1000" c...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(4) > a:nth-child(1))
<a rel="tooltip" class="modebar-btn" data-title="Toggle Spike Lines" data-attr="_cartesianSpikesEnabled" data-val="on" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(4) > a:nth-child(2))
<a rel="tooltip" class="modebar-btn" data-title="Show closest data on hover" data-attr="hovermode" data-val="closest" data-toggle="false" data-gravity="ne"><svg viewBox="0 0 1500 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(4) > a:nth-child(3))
<a rel="tooltip" class="modebar-btn active" data-title="Compare data on hover" data-attr="hovermode" data-val="x" data-toggle="false" data-gravity="ne"><svg viewBox="0 0 1125 1000" cl...</a>
✘ 0/1 URLs passed

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                              Milestone
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                              Relationships
                              None yet
                              Development
                              No branches or pull requests
                              Issue actions
                              
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
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::-webkit-scrollbar-thumb { background: #444 !important; }
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/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
function removeDarkMode() {
var style = document.getElementById('universal-dark-mode-style');
if (style) style.remove();
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})();
})();
modebar tools are not accessible · Issue #6645 · plotly/plotly.js · GitHub
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                              modebar tools are not accessible #6645
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                              Closed
                              modebar tools are not accessible#6645
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                              P2considered for next cyclebugsomething broken
                              Description
                              @warrickball
                              warrickball
                              opened on Jun 15, 2023
                              I'm currently working in a small team on a Django website that has an embedded Plotly Dash. We're working through accessibility issues raised by pa11y-ci and have identified a few that are arising from within Plotly.js itself.
                              Here's the minimal example I set up based on the "getting started" example code on the Plotly.js website:
                              <!DOCTYPE html><htmllang=en><head><title>Plotly.js Minimal Working Example</title><scriptsrc="https://cdn.plot.ly/plotly-latest.min.js"></script></head><body><divid="tester" style="width:600px;height:250px;"></div><script>TESTER=document.getElementById('tester');Plotly.newPlot(TESTER,[{x: [1,2,3,4,5],y: [1,2,4,8,16]}]);</script></body></html>
                              I served this using a simple Python server:
                              $ python3 -m http.server 8500 --bind 127.0.0.1 &

                              and run pa11y-ci with this configuration:
                              $ cat .pa11yci
{
"defaults": {
"runners": ["axe", "htmlcs"],
"chromeLaunchConfig": {
"args": ["--no-sandbox"]
}
},
"urls": [
"http://127.0.0.1:8500/plotly-mwe.html"
]
}

                              which produces a number of issues (full log collapsed below), several of which look like this:
                              $ npx pa11y-ci
Running Pa11y on 1 URLs:
127.0.0.1 - - [15/Jun/2023 15:40:27] "GET /plotly-mwe.html HTTP/1.1" 200 -
> http://127.0.0.1:8500/plotly-mwe.html - 22 errors
Errors in http://127.0.0.1:8500/plotly-mwe.html:
...
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(1) > a)
<a rel="tooltip" class="modebar-btn" data-title="Download plot as a png" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
...
✘ 0/1 URLs passed

                              There's one of these for each of the tooltips, presumably because they have neither id nor name attributes.
                              I'm not sure what the most appopriate id or name attribute would be.
                              Full error log
                              $ npx pa11y-ci
Running Pa11y on 1 URLs:
127.0.0.1 - - [15/Jun/2023 15:40:27] "GET /plotly-mwe.html HTTP/1.1" 200 -
> http://127.0.0.1:8500/plotly-mwe.html - 22 errors
Errors in http://127.0.0.1:8500/plotly-mwe.html:
• Page must have means to bypass repeated blocks (https://dequeuniversity.com/rules/axe/4.7/bypass?application=axeAPI)
(html)
<html lang="en"><head> <title>Plotly.js Min...</html>
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(1) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="1" data-math="N" transform="translate(105.75,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(2) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="2" data-math="N" transform="translate(202.87,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(3) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="3" data-math="N" transform="translate(300,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity: 1;
white-space: pre;...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(4) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="4" data-math="N" transform="translate(397.12,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(15) > g:nth-child(5) > text)
<text text-anchor="middle" x="0" y="183" data-unformatted="5" data-math="N" transform="translate(494.25,0)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68); fill-opacity:
1; white-space: p...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(1) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="0" data-math="N" transform="translate(0,166.45)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; wh...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(2) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="5" data-math="N" transform="translate(0,147.95)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; wh...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(3) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="10" data-math="N" transform="translate(0,129.45)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; w...
• Elements must meet minimum color contrast ratio thresholds (https://dequeuniversity.com/rules/axe/4.7/color-contrast?application=axeAPI)
(#tester > div > div > svg:nth-child(1) > g:nth-child(5) > g > g:nth-child(16) > g:nth-child(4) > text)
<text text-anchor="end" x="79" y="4.199999999999999" data-unformatted="15" data-math="N" transform="translate(0,110.95)" style="font-family: &quot;Open Sans&quot;, verdana, arial, sans-serif; font-size: 12px; fill: rgb(68, 68, 68);
fill-opacity: 1; w...
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(1) > a)
<a rel="tooltip" class="modebar-btn" data-title="Download plot as a png" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(1))
<a rel="tooltip" class="modebar-btn active" data-title="Zoom" data-attr="dragmode" data-val="zoom" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(2))
<a rel="tooltip" class="modebar-btn" data-title="Pan" data-attr="dragmode" data-val="pan" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(3))
<a rel="tooltip" class="modebar-btn" data-title="Box Select" data-attr="dragmode" data-val="select" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(2) > a:nth-child(4))
<a rel="tooltip" class="modebar-btn" data-title="Lasso Select" data-attr="dragmode" data-val="lasso" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1031 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(1))
<a rel="tooltip" class="modebar-btn" data-title="Zoom in" data-attr="zoom" data-val="in" data-toggle="false" data-gravity="n"><svg viewBox="0 0 875 1000" cla...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(2))
<a rel="tooltip" class="modebar-btn" data-title="Zoom out" data-attr="zoom" data-val="out" data-toggle="false" data-gravity="n"><svg viewBox="0 0 875 1000" cla...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(3))
<a rel="tooltip" class="modebar-btn" data-title="Autoscale" data-attr="zoom" data-val="auto" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(3) > a:nth-child(4))
<a rel="tooltip" class="modebar-btn" data-title="Reset axes" data-attr="zoom" data-val="reset" data-toggle="false" data-gravity="n"><svg viewBox="0 0 928.6 1000" c...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(4) > a:nth-child(1))
<a rel="tooltip" class="modebar-btn" data-title="Toggle Spike Lines" data-attr="_cartesianSpikesEnabled" data-val="on" data-toggle="false" data-gravity="n"><svg viewBox="0 0 1000 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(4) > a:nth-child(2))
<a rel="tooltip" class="modebar-btn" data-title="Show closest data on hover" data-attr="hovermode" data-val="closest" data-toggle="false" data-gravity="ne"><svg viewBox="0 0 1500 1000" cl...</a>
• Anchor element found with no link content and no name and/or ID attribute.
(#modebar-c74f48 > div:nth-child(4) > a:nth-child(3))
<a rel="tooltip" class="modebar-btn active" data-title="Compare data on hover" data-attr="hovermode" data-val="x" data-toggle="false" data-gravity="ne"><svg viewBox="0 0 1125 1000" cl...</a>
✘ 0/1 URLs passed

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