LCP element span does not correlate with LCP vertical mark in waterfall #13408

Closed as not planned
Closed as not planned
LCP element span does not correlate with LCP vertical mark in waterfall#13408
Labels
BugFeature: web-vitalsStale

Description

@serglom21
serglom21
opened on Aug 16, 2024

Is there an existing issue for this?

How do you use Sentry?

Sentry Saas (sentry.io)

Which SDK are you using?

@sentry/remix

SDK Version

8.25.0

Framework Version

No response

Link to Sentry event

No response

Reproduction Example/SDK Setup

No response

Steps to Reproduce

Customer Case

Sentry reports the LCP value for a page load and the LCP element that contributed to the value. However, the LCP value for the pageload itself does not match with the end of the span of the LCP element in the waterfall

Expected Result

I would expect the LCP element span to finish at the same timeframe as the reported value of the LCP vital for the page load

Actual Result

The LCP element span finishes way before the time that Sentry reports as the LCP for the pageload

Image

Image

Metadata

Metadata

Assignees

No one assigned

    Labels

    BugFeature: web-vitalsStale

    Projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions

    , 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
     blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

    Skip to content
    LCP element span does not correlate with LCP vertical mark in waterfall #13408
    Closed as not planned
    Closed as not planned
    LCP element span does not correlate with LCP vertical mark in waterfall#13408
    Labels
    BugFeature: web-vitalsStale
    Description
    @serglom21
    serglom21
    opened on Aug 16, 2024
    Is there an existing issue for this?
    How do you use Sentry?
    Sentry Saas (sentry.io)
    Which SDK are you using?
    @sentry/remix
    SDK Version
    8.25.0
    Framework Version
    No response
    Link to Sentry event
    No response
    Reproduction Example/SDK Setup
    No response
    Steps to Reproduce
    Customer Case
    Sentry reports the LCP value for a page load and the LCP element that contributed to the value. However, the LCP value for the pageload itself does not match with the end of the span of the LCP element in the waterfall
    Expected Result
    I would expect the LCP element span to finish at the same timeframe as the reported value of the LCP vital for the page load
    Actual Result
    The LCP element span finishes way before the time that Sentry reports as the LCP for the pageload
    Image
    Image
    Metadata
    Metadata
    Assignees
    No one assigned
      Labels
      BugFeature: web-vitalsStale
      Projects
      Milestone
      No milestone
      Relationships
      None yet
      Development
      No branches or pull requests
      Issue actions
      
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

      Skip to content
      LCP element span does not correlate with LCP vertical mark in waterfall #13408
      Closed as not planned
      Closed as not planned
      LCP element span does not correlate with LCP vertical mark in waterfall#13408
      Labels
      BugFeature: web-vitalsStale
      Description
      @serglom21
      serglom21
      opened on Aug 16, 2024
      Is there an existing issue for this?
      How do you use Sentry?
      Sentry Saas (sentry.io)
      Which SDK are you using?
      @sentry/remix
      SDK Version
      8.25.0
      Framework Version
      No response
      Link to Sentry event
      No response
      Reproduction Example/SDK Setup
      No response
      Steps to Reproduce
      Customer Case
      Sentry reports the LCP value for a page load and the LCP element that contributed to the value. However, the LCP value for the pageload itself does not match with the end of the span of the LCP element in the waterfall
      Expected Result
      I would expect the LCP element span to finish at the same timeframe as the reported value of the LCP vital for the page load
      Actual Result
      The LCP element span finishes way before the time that Sentry reports as the LCP for the pageload
      Image
      Image
      Metadata
      Metadata
      Assignees
      No one assigned
        Labels
        BugFeature: web-vitalsStale
        Projects
        Milestone
        No milestone
        Relationships
        None yet
        Development
        No branches or pull requests
        Issue actions
        
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

        Skip to content
        LCP element span does not correlate with LCP vertical mark in waterfall #13408
        Closed as not planned
        Closed as not planned
        LCP element span does not correlate with LCP vertical mark in waterfall#13408
        Labels
        BugFeature: web-vitalsStale
        Description
        @serglom21
        serglom21
        opened on Aug 16, 2024
        Is there an existing issue for this?
        How do you use Sentry?
        Sentry Saas (sentry.io)
        Which SDK are you using?
        @sentry/remix
        SDK Version
        8.25.0
        Framework Version
        No response
        Link to Sentry event
        No response
        Reproduction Example/SDK Setup
        No response
        Steps to Reproduce
        Customer Case
        Sentry reports the LCP value for a page load and the LCP element that contributed to the value. However, the LCP value for the pageload itself does not match with the end of the span of the LCP element in the waterfall
        Expected Result
        I would expect the LCP element span to finish at the same timeframe as the reported value of the LCP vital for the page load
        Actual Result
        The LCP element span finishes way before the time that Sentry reports as the LCP for the pageload
        Image
        Image
        Metadata
        Metadata
        Assignees
        No one assigned
          Labels
          BugFeature: web-vitalsStale
          Projects
          Milestone
          No milestone
          Relationships
          None yet
          Development
          No branches or pull requests
          Issue actions
          
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

          Skip to content
          LCP element span does not correlate with LCP vertical mark in waterfall #13408
          Closed as not planned
          Closed as not planned
          LCP element span does not correlate with LCP vertical mark in waterfall#13408
          Labels
          BugFeature: web-vitalsStale
          Description
          @serglom21
          serglom21
          opened on Aug 16, 2024
          Is there an existing issue for this?
          How do you use Sentry?
          Sentry Saas (sentry.io)
          Which SDK are you using?
          @sentry/remix
          SDK Version
          8.25.0
          Framework Version
          No response
          Link to Sentry event
          No response
          Reproduction Example/SDK Setup
          No response
          Steps to Reproduce
          Customer Case
          Sentry reports the LCP value for a page load and the LCP element that contributed to the value. However, the LCP value for the pageload itself does not match with the end of the span of the LCP element in the waterfall
          Expected Result
          I would expect the LCP element span to finish at the same timeframe as the reported value of the LCP vital for the page load
          Actual Result
          The LCP element span finishes way before the time that Sentry reports as the LCP for the pageload
          Image
          Image
          Metadata
          Metadata
          Assignees
          No one assigned
            Labels
            BugFeature: web-vitalsStale
            Projects
            Milestone
            No milestone
            Relationships
            None yet
            Development
            No branches or pull requests
            Issue actions
            
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

            Skip to content
            LCP element span does not correlate with LCP vertical mark in waterfall #13408
            Closed as not planned
            Closed as not planned
            LCP element span does not correlate with LCP vertical mark in waterfall#13408
            Labels
            BugFeature: web-vitalsStale
            Description
            @serglom21
            serglom21
            opened on Aug 16, 2024
            Is there an existing issue for this?
            How do you use Sentry?
            Sentry Saas (sentry.io)
            Which SDK are you using?
            @sentry/remix
            SDK Version
            8.25.0
            Framework Version
            No response
            Link to Sentry event
            No response
            Reproduction Example/SDK Setup
            No response
            Steps to Reproduce
            Customer Case
            Sentry reports the LCP value for a page load and the LCP element that contributed to the value. However, the LCP value for the pageload itself does not match with the end of the span of the LCP element in the waterfall
            Expected Result
            I would expect the LCP element span to finish at the same timeframe as the reported value of the LCP vital for the page load
            Actual Result
            The LCP element span finishes way before the time that Sentry reports as the LCP for the pageload
            Image
            Image
            Metadata
            Metadata
            Assignees
            No one assigned
              Labels
              BugFeature: web-vitalsStale
              Projects
              Milestone
              No milestone
              Relationships
              None yet
              Development
              No branches or pull requests
              Issue actions
              
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

              Skip to content
              LCP element span does not correlate with LCP vertical mark in waterfall #13408
              Closed as not planned
              Closed as not planned
              LCP element span does not correlate with LCP vertical mark in waterfall#13408
              Labels
              BugFeature: web-vitalsStale
              Description
              @serglom21
              serglom21
              opened on Aug 16, 2024
              Is there an existing issue for this?
              How do you use Sentry?
              Sentry Saas (sentry.io)
              Which SDK are you using?
              @sentry/remix
              SDK Version
              8.25.0
              Framework Version
              No response
              Link to Sentry event
              No response
              Reproduction Example/SDK Setup
              No response
              Steps to Reproduce
              Customer Case
              Sentry reports the LCP value for a page load and the LCP element that contributed to the value. However, the LCP value for the pageload itself does not match with the end of the span of the LCP element in the waterfall
              Expected Result
              I would expect the LCP element span to finish at the same timeframe as the reported value of the LCP vital for the page load
              Actual Result
              The LCP element span finishes way before the time that Sentry reports as the LCP for the pageload
              Image
              Image
              Metadata
              Metadata
              Assignees
              No one assigned
                Labels
                BugFeature: web-vitalsStale
                Projects
                Milestone
                No milestone
                Relationships
                None yet
                Development
                No branches or pull requests
                Issue actions
                
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

                Skip to content
                LCP element span does not correlate with LCP vertical mark in waterfall #13408
                Closed as not planned
                Closed as not planned
                LCP element span does not correlate with LCP vertical mark in waterfall#13408
                Labels
                BugFeature: web-vitalsStale
                Description
                @serglom21
                serglom21
                opened on Aug 16, 2024
                Is there an existing issue for this?
                How do you use Sentry?
                Sentry Saas (sentry.io)
                Which SDK are you using?
                @sentry/remix
                SDK Version
                8.25.0
                Framework Version
                No response
                Link to Sentry event
                No response
                Reproduction Example/SDK Setup
                No response
                Steps to Reproduce
                Customer Case
                Sentry reports the LCP value for a page load and the LCP element that contributed to the value. However, the LCP value for the pageload itself does not match with the end of the span of the LCP element in the waterfall
                Expected Result
                I would expect the LCP element span to finish at the same timeframe as the reported value of the LCP vital for the page load
                Actual Result
                The LCP element span finishes way before the time that Sentry reports as the LCP for the pageload
                Image
                Image
                Metadata
                Metadata
                Assignees
                No one assigned
                  Labels
                  BugFeature: web-vitalsStale
                  Projects
                  Milestone
                  No milestone
                  Relationships
                  None yet
                  Development
                  No branches or pull requests
                  Issue actions