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TrackJS Browser Agent

The browser agent for collecting errors from JavaScript, Network, and console exceptions. The agent wraps the browser API to record context about your application, network, and visitor, and include that context when unhandled errors occur.

You'll need a TrackJS account to use this agent. If you don't have one, why not start a free trial today?

Quick Start

  1. Signup for TrackJS and get your token.
  2. Add a dependency on TrackJS with npm install trackjs --save
  3. Install the agent in your app. You can paste the script tags into the <head> of your HTML:
<scriptsrc="PATH_TO_TRACKJS/t.js"></script><script>window.TrackJS&&TrackJS.install({token: 'YOUR_TOKEN_HERE'});</script>

Or you can bundle it as a module into your application.

import{TrackJS}from'trackjs';TrackJS.install({token: 'YOUR_TOKEN_HERE'});
  1. Test it out by calling TrackJS.track('testing!') somewhere in your application.
  2. You should see your error on TrackJS within a few seconds.

More Information

You can find more information about how to install and configure the agent in the TrackJS Documentation. If you run into any trouble, let us know right away at hello@trackjs.com

About

JavaScript Browser Error Monitoring Agent from TrackJS

trackjs.com

Topics

error-monitoringerror-reportingfront-end-monitorfrontend-monitoringjavascript-monitoringmonitoring

Resources

Readme
License
Activity
Custom properties

Stars

128 stars

Watchers

11 watching

Forks

17 forks
Report repository

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Packages

Used by

Contributors

, '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" + '

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TrackJS Browser Agent
The browser agent for collecting errors from JavaScript, Network, and console
exceptions. The agent wraps the browser API to record context about your
application, network, and visitor, and include that context when unhandled
errors occur.
You'll need a TrackJS account to use this agent. If you don't have one, why not
start a free trial today?
Quick Start
  1. Signup for TrackJS and get your token.
  2. Add a dependency on TrackJS with npm install trackjs --save
  3. Install the agent in your app. You can paste the script tags into the
<head> of your HTML:
<scriptsrc="PATH_TO_TRACKJS/t.js"></script><script>window.TrackJS&&TrackJS.install({token: 'YOUR_TOKEN_HERE'});</script>
Or you can bundle it as a module into your application.
import{TrackJS}from'trackjs';TrackJS.install({token: 'YOUR_TOKEN_HERE'});
  1. Test it out by calling TrackJS.track('testing!') somewhere in your
application.
  2. You should see your error on TrackJS within
a few seconds.
More Information
You can find more information about how to install and configure the agent in
the TrackJS Documentation. If you run into any
trouble, let us know right away at hello@trackjs.com
About
JavaScript Browser Error Monitoring Agent from TrackJS
trackjs.com
Topics
error-monitoringerror-reportingfront-end-monitorfrontend-monitoringjavascript-monitoringmonitoring
Resources
Readme
License
Activity
Custom properties
Stars
128 stars
Watchers
11 watching
Forks
17 forks
Report repository
Releases
Packages
Used by
Contributors

, '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('^' + ".*" + '

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TrackJS Browser Agent
The browser agent for collecting errors from JavaScript, Network, and console
exceptions. The agent wraps the browser API to record context about your
application, network, and visitor, and include that context when unhandled
errors occur.
You'll need a TrackJS account to use this agent. If you don't have one, why not
start a free trial today?
Quick Start
  1. Signup for TrackJS and get your token.
  2. Add a dependency on TrackJS with npm install trackjs --save
  3. Install the agent in your app. You can paste the script tags into the
<head> of your HTML:
<scriptsrc="PATH_TO_TRACKJS/t.js"></script><script>window.TrackJS&&TrackJS.install({token: 'YOUR_TOKEN_HERE'});</script>
Or you can bundle it as a module into your application.
import{TrackJS}from'trackjs';TrackJS.install({token: 'YOUR_TOKEN_HERE'});
  1. Test it out by calling TrackJS.track('testing!') somewhere in your
application.
  2. You should see your error on TrackJS within
a few seconds.
More Information
You can find more information about how to install and configure the agent in
the TrackJS Documentation. If you run into any
trouble, let us know right away at hello@trackjs.com
About
JavaScript Browser Error Monitoring Agent from TrackJS
trackjs.com
Topics
error-monitoringerror-reportingfront-end-monitorfrontend-monitoringjavascript-monitoringmonitoring
Resources
Readme
License
Activity
Custom properties
Stars
128 stars
Watchers
11 watching
Forks
17 forks
Report repository
Releases
Packages
Used by
Contributors

, '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
BranchesTags
Repository files navigation
TrackJS Browser Agent
The browser agent for collecting errors from JavaScript, Network, and console
exceptions. The agent wraps the browser API to record context about your
application, network, and visitor, and include that context when unhandled
errors occur.
You'll need a TrackJS account to use this agent. If you don't have one, why not
start a free trial today?
Quick Start
  1. Signup for TrackJS and get your token.
  2. Add a dependency on TrackJS with npm install trackjs --save
  3. Install the agent in your app. You can paste the script tags into the
<head> of your HTML:
<scriptsrc="PATH_TO_TRACKJS/t.js"></script><script>window.TrackJS&&TrackJS.install({token: 'YOUR_TOKEN_HERE'});</script>
Or you can bundle it as a module into your application.
import{TrackJS}from'trackjs';TrackJS.install({token: 'YOUR_TOKEN_HERE'});
  1. Test it out by calling TrackJS.track('testing!') somewhere in your
application.
  2. You should see your error on TrackJS within
a few seconds.
More Information
You can find more information about how to install and configure the agent in
the TrackJS Documentation. If you run into any
trouble, let us know right away at hello@trackjs.com
About
JavaScript Browser Error Monitoring Agent from TrackJS
trackjs.com
Topics
error-monitoringerror-reportingfront-end-monitorfrontend-monitoringjavascript-monitoringmonitoring
Resources
Readme
License
Activity
Custom properties
Stars
128 stars
Watchers
11 watching
Forks
17 forks
Report repository
Releases
Packages
Used by
Contributors

, '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" + '

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BranchesTags
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TrackJS Browser Agent
The browser agent for collecting errors from JavaScript, Network, and console
exceptions. The agent wraps the browser API to record context about your
application, network, and visitor, and include that context when unhandled
errors occur.
You'll need a TrackJS account to use this agent. If you don't have one, why not
start a free trial today?
Quick Start
  1. Signup for TrackJS and get your token.
  2. Add a dependency on TrackJS with npm install trackjs --save
  3. Install the agent in your app. You can paste the script tags into the
<head> of your HTML:
<scriptsrc="PATH_TO_TRACKJS/t.js"></script><script>window.TrackJS&&TrackJS.install({token: 'YOUR_TOKEN_HERE'});</script>
Or you can bundle it as a module into your application.
import{TrackJS}from'trackjs';TrackJS.install({token: 'YOUR_TOKEN_HERE'});
  1. Test it out by calling TrackJS.track('testing!') somewhere in your
application.
  2. You should see your error on TrackJS within
a few seconds.
More Information
You can find more information about how to install and configure the agent in
the TrackJS Documentation. If you run into any
trouble, let us know right away at hello@trackjs.com
About
JavaScript Browser Error Monitoring Agent from TrackJS
trackjs.com
Topics
error-monitoringerror-reportingfront-end-monitorfrontend-monitoringjavascript-monitoringmonitoring
Resources
Readme
License
Activity
Custom properties
Stars
128 stars
Watchers
11 watching
Forks
17 forks
Report repository
Releases
Packages
Used by
Contributors

, '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
BranchesTags
Repository files navigation
TrackJS Browser Agent
The browser agent for collecting errors from JavaScript, Network, and console
exceptions. The agent wraps the browser API to record context about your
application, network, and visitor, and include that context when unhandled
errors occur.
You'll need a TrackJS account to use this agent. If you don't have one, why not
start a free trial today?
Quick Start
  1. Signup for TrackJS and get your token.
  2. Add a dependency on TrackJS with npm install trackjs --save
  3. Install the agent in your app. You can paste the script tags into the
<head> of your HTML:
<scriptsrc="PATH_TO_TRACKJS/t.js"></script><script>window.TrackJS&&TrackJS.install({token: 'YOUR_TOKEN_HERE'});</script>
Or you can bundle it as a module into your application.
import{TrackJS}from'trackjs';TrackJS.install({token: 'YOUR_TOKEN_HERE'});
  1. Test it out by calling TrackJS.track('testing!') somewhere in your
application.
  2. You should see your error on TrackJS within
a few seconds.
More Information
You can find more information about how to install and configure the agent in
the TrackJS Documentation. If you run into any
trouble, let us know right away at hello@trackjs.com
About
JavaScript Browser Error Monitoring Agent from TrackJS
trackjs.com
Topics
error-monitoringerror-reportingfront-end-monitorfrontend-monitoringjavascript-monitoringmonitoring
Resources
Readme
License
Activity
Custom properties
Stars
128 stars
Watchers
11 watching
Forks
17 forks
Report repository
Releases
Packages
Used by
Contributors

, '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
BranchesTags
Repository files navigation
TrackJS Browser Agent
The browser agent for collecting errors from JavaScript, Network, and console
exceptions. The agent wraps the browser API to record context about your
application, network, and visitor, and include that context when unhandled
errors occur.
You'll need a TrackJS account to use this agent. If you don't have one, why not
start a free trial today?
Quick Start
  1. Signup for TrackJS and get your token.
  2. Add a dependency on TrackJS with npm install trackjs --save
  3. Install the agent in your app. You can paste the script tags into the
<head> of your HTML:
<scriptsrc="PATH_TO_TRACKJS/t.js"></script><script>window.TrackJS&&TrackJS.install({token: 'YOUR_TOKEN_HERE'});</script>
Or you can bundle it as a module into your application.
import{TrackJS}from'trackjs';TrackJS.install({token: 'YOUR_TOKEN_HERE'});
  1. Test it out by calling TrackJS.track('testing!') somewhere in your
application.
  2. You should see your error on TrackJS within
a few seconds.
More Information
You can find more information about how to install and configure the agent in
the TrackJS Documentation. If you run into any
trouble, let us know right away at hello@trackjs.com
About
JavaScript Browser Error Monitoring Agent from TrackJS
trackjs.com
Topics
error-monitoringerror-reportingfront-end-monitorfrontend-monitoringjavascript-monitoringmonitoring
Resources
Readme
License
Activity
Custom properties
Stars
128 stars
Watchers
11 watching
Forks
17 forks
Report repository
Releases
Packages
Used by
Contributors

, '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); }
})();
})();

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TrackJS Browser Agent
The browser agent for collecting errors from JavaScript, Network, and console
exceptions. The agent wraps the browser API to record context about your
application, network, and visitor, and include that context when unhandled
errors occur.
You'll need a TrackJS account to use this agent. If you don't have one, why not
start a free trial today?
Quick Start
  1. Signup for TrackJS and get your token.
  2. Add a dependency on TrackJS with npm install trackjs --save
  3. Install the agent in your app. You can paste the script tags into the
<head> of your HTML:
<scriptsrc="PATH_TO_TRACKJS/t.js"></script><script>window.TrackJS&&TrackJS.install({token: 'YOUR_TOKEN_HERE'});</script>
Or you can bundle it as a module into your application.
import{TrackJS}from'trackjs';TrackJS.install({token: 'YOUR_TOKEN_HERE'});
  1. Test it out by calling TrackJS.track('testing!') somewhere in your
application.
  2. You should see your error on TrackJS within
a few seconds.
More Information
You can find more information about how to install and configure the agent in
the TrackJS Documentation. If you run into any
trouble, let us know right away at hello@trackjs.com
About
JavaScript Browser Error Monitoring Agent from TrackJS
trackjs.com
Topics
error-monitoringerror-reportingfront-end-monitorfrontend-monitoringjavascript-monitoringmonitoring
Resources
Readme
License
Activity
Custom properties
Stars
128 stars
Watchers
11 watching
Forks
17 forks
Report repository
Releases
Packages
Used by
Contributors