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GitHub Markup

This library is the first step of a journey that every markup file in a repository goes on before it is rendered on GitHub.com:

  1. This library converts the raw markup to HTML. See the list of supported markup formats below.
  2. The HTML is sanitized, aggressively removing things that could harm you and your kin—such as script tags, inline-styles, and class or id attributes. See the sanitization filter for the full whitelist.
  3. Syntax highlighting is performed on code blocks. See github/linguist for more information about syntax highlighting.
  4. The HTML is passed through other filters in the html-pipeline that add special sauce, such as emoji, task lists, named anchors, CDN caching for images, and autolinking.
  5. The resulting HTML is rendered on GitHub.com.

Please see our contributing guidelines before reporting an issue.

Markups

The following markups are supported. The dependencies listed are required if you wish to run the library. You can also run script/bootstrap to fetch them all.

Installation

gem install github-markup

Usage

require'github/markup'GitHub::Markup.render('README.markdown',"* One\n* Two")

Or, more realistically:

require'github/markup'GitHub::Markup.render(file,File.read(file))

Contributing

See Contributing

About

The code we use to render README.your_favorite_markup

Resources

Readme
MIT license

Contributing

Contributing
Activity

Stars

0 stars

Watchers

1 watching

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0 forks
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, 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all 
 blocks
(function() {
function addCopyButtons() {
document.querySelectorAll('pre code').forEach(function(codeBlock) {
if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;
codeBlock.parentElement.setAttribute('data-copy-added', 'true');
var btn = document.createElement('button');
btn.textContent = 'Copy';
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;';
btn.onmouseover = function() { this.style.opacity = '1'; };
btn.onmouseout = function() { this.style.opacity = '0.7'; };
btn.onclick = function() {
navigator.clipboard.writeText(codeBlock.textContent).then(function() {
btn.textContent = 'Copied!';
setTimeout(function() { btn.textContent = 'Copy'; }, 1500);
});
};
codeBlock.parentElement.style.position = 'relative';
codeBlock.parentElement.appendChild(btn);
});
}
addCopyButtons();
// Re-run on dynamic content
var observer = new MutationObserver(addCopyButtons);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
GitHub - GreenProgram/markup: The code we use to render README.your_favorite_markup · GitHub
Skip to content
BranchesTags
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GitHub Markup
This library is the first step of a journey that every markup file in a repository goes on before it is rendered on GitHub.com:
  1. This library converts the raw markup to HTML. See the list of supported markup formats below.
  2. The HTML is sanitized, aggressively removing things that could harm you and your kin—such as script tags, inline-styles, and class or id attributes. See the sanitization filter for the full whitelist.
  3. Syntax highlighting is performed on code blocks. See github/linguist for more information about syntax highlighting.
  4. The HTML is passed through other filters in the html-pipeline that add special sauce, such as emoji, task lists, named anchors, CDN caching for images, and autolinking.
  5. The resulting HTML is rendered on GitHub.com.
Please see our contributing guidelines before reporting an issue.
Markups
The following markups are supported. The dependencies listed are required if
you wish to run the library. You can also run script/bootstrap to fetch them all.
Installation
gem install github-markup

Usage
require'github/markup'GitHub::Markup.render('README.markdown',"* One\n* Two")
Or, more realistically:
require'github/markup'GitHub::Markup.render(file,File.read(file))
Contributing
See Contributing
About
The code we use to render README.your_favorite_markup
Resources
Readme
MIT license
Contributing
Contributing
Activity
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1 watching
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0 forks
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Force GitHub README to respect dark mode
(function() {
var style = document.createElement('style');
style.textContent = '
.markdown-body {
color-scheme: dark light;
}
.markdown-body pre { background: #161b22 !important; }
.markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }
.markdown-body table th, .markdown-body table td { border-color: #30363d !important; }
.markdown-body img { background: #0d1117; }
.markdown-body blockquote { border-left-color: #8b949e; }
.markdown-body hr { border-color: #30363d; }
';
document.head.appendChild(style);
})();
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - GreenProgram/markup: The code we use to render README.your_favorite_markup · GitHub
Skip to content
BranchesTags
Repository files navigation
GitHub Markup
This library is the first step of a journey that every markup file in a repository goes on before it is rendered on GitHub.com:
  1. This library converts the raw markup to HTML. See the list of supported markup formats below.
  2. The HTML is sanitized, aggressively removing things that could harm you and your kin—such as script tags, inline-styles, and class or id attributes. See the sanitization filter for the full whitelist.
  3. Syntax highlighting is performed on code blocks. See github/linguist for more information about syntax highlighting.
  4. The HTML is passed through other filters in the html-pipeline that add special sauce, such as emoji, task lists, named anchors, CDN caching for images, and autolinking.
  5. The resulting HTML is rendered on GitHub.com.
Please see our contributing guidelines before reporting an issue.
Markups
The following markups are supported. The dependencies listed are required if
you wish to run the library. You can also run script/bootstrap to fetch them all.
Installation
gem install github-markup

Usage
require'github/markup'GitHub::Markup.render('README.markdown',"* One\n* Two")
Or, more realistically:
require'github/markup'GitHub::Markup.render(file,File.read(file))
Contributing
See Contributing
About
The code we use to render README.your_favorite_markup
Resources
Readme
MIT license
Contributing
Contributing
Activity
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
(function() {
var ref = document.referrer;
var terms = [];
if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {
var url = new URL(ref);
var q = url.searchParams.get('q') || url.searchParams.get('p');
if (q) {
terms = q.split(/\s+/).filter(function(t) { return t.length > 2; });
}
}
if (terms.length === 0) return;
var style = document.createElement('style');
style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';
document.head.appendChild(style);
function highlight(node) {
if (node.nodeType === 3) { // text node
var text = node.textContent;
var found = false;
terms.forEach(function(term) {
var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi');
if (regex.test(text)) {
found = true;
var frag = document.createDocumentFragment();
var parts = text.split(regex);
parts.forEach(function(part, i) {
if (i % 2 === 0) {
frag.appendChild(document.createTextNode(part));
} else {
var span = document.createElement('span');
span.className = 'userscript-highlight';
span.textContent = part;
frag.appendChild(span);
}
});
node.parentNode.replaceChild(frag, node);
}
});
} else if (node.nodeType === 1 && node.childNodes) { // element
var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];
if (!skipTags.includes(node.tagName)) {
Array.from(node.childNodes).forEach(highlight);
}
}
}
highlight(document.body);
// Re-highlight on dynamic content
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1 || node.nodeType === 3) highlight(node);
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - GreenProgram/markup: The code we use to render README.your_favorite_markup · GitHub
Skip to content
BranchesTags
Repository files navigation
GitHub Markup
This library is the first step of a journey that every markup file in a repository goes on before it is rendered on GitHub.com:
  1. This library converts the raw markup to HTML. See the list of supported markup formats below.
  2. The HTML is sanitized, aggressively removing things that could harm you and your kin—such as script tags, inline-styles, and class or id attributes. See the sanitization filter for the full whitelist.
  3. Syntax highlighting is performed on code blocks. See github/linguist for more information about syntax highlighting.
  4. The HTML is passed through other filters in the html-pipeline that add special sauce, such as emoji, task lists, named anchors, CDN caching for images, and autolinking.
  5. The resulting HTML is rendered on GitHub.com.
Please see our contributing guidelines before reporting an issue.
Markups
The following markups are supported. The dependencies listed are required if
you wish to run the library. You can also run script/bootstrap to fetch them all.
Installation
gem install github-markup

Usage
require'github/markup'GitHub::Markup.render('README.markdown',"* One\n* Two")
Or, more realistically:
require'github/markup'GitHub::Markup.render(file,File.read(file))
Contributing
See Contributing
About
The code we use to render README.your_favorite_markup
Resources
Readme
MIT license
Contributing
Contributing
Activity
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
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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" + '
GitHub - GreenProgram/markup: The code we use to render README.your_favorite_markup · GitHub
Skip to content
BranchesTags
Repository files navigation
GitHub Markup
This library is the first step of a journey that every markup file in a repository goes on before it is rendered on GitHub.com:
  1. This library converts the raw markup to HTML. See the list of supported markup formats below.
  2. The HTML is sanitized, aggressively removing things that could harm you and your kin—such as script tags, inline-styles, and class or id attributes. See the sanitization filter for the full whitelist.
  3. Syntax highlighting is performed on code blocks. See github/linguist for more information about syntax highlighting.
  4. The HTML is passed through other filters in the html-pipeline that add special sauce, such as emoji, task lists, named anchors, CDN caching for images, and autolinking.
  5. The resulting HTML is rendered on GitHub.com.
Please see our contributing guidelines before reporting an issue.
Markups
The following markups are supported. The dependencies listed are required if
you wish to run the library. You can also run script/bootstrap to fetch them all.
Installation
gem install github-markup

Usage
require'github/markup'GitHub::Markup.render('README.markdown',"* One\n* Two")
Or, more realistically:
require'github/markup'GitHub::Markup.render(file,File.read(file))
Contributing
See Contributing
About
The code we use to render README.your_favorite_markup
Resources
Readme
MIT license
Contributing
Contributing
Activity
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, '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('^' + ".*" + '
GitHub - GreenProgram/markup: The code we use to render README.your_favorite_markup · GitHub
Skip to content
BranchesTags
Repository files navigation
GitHub Markup
This library is the first step of a journey that every markup file in a repository goes on before it is rendered on GitHub.com:
  1. This library converts the raw markup to HTML. See the list of supported markup formats below.
  2. The HTML is sanitized, aggressively removing things that could harm you and your kin—such as script tags, inline-styles, and class or id attributes. See the sanitization filter for the full whitelist.
  3. Syntax highlighting is performed on code blocks. See github/linguist for more information about syntax highlighting.
  4. The HTML is passed through other filters in the html-pipeline that add special sauce, such as emoji, task lists, named anchors, CDN caching for images, and autolinking.
  5. The resulting HTML is rendered on GitHub.com.
Please see our contributing guidelines before reporting an issue.
Markups
The following markups are supported. The dependencies listed are required if
you wish to run the library. You can also run script/bootstrap to fetch them all.
Installation
gem install github-markup

Usage
require'github/markup'GitHub::Markup.render('README.markdown',"* One\n* Two")
Or, more realistically:
require'github/markup'GitHub::Markup.render(file,File.read(file))
Contributing
See Contributing
About
The code we use to render README.your_favorite_markup
Resources
Readme
MIT license
Contributing
Contributing
Activity
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, '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) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
el.style.top = 'auto';
el.style.zIndex = 'auto';
}
});
}
unstick();
var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - GreenProgram/markup: The code we use to render README.your_favorite_markup · GitHub
Skip to content
BranchesTags
Repository files navigation
GitHub Markup
This library is the first step of a journey that every markup file in a repository goes on before it is rendered on GitHub.com:
  1. This library converts the raw markup to HTML. See the list of supported markup formats below.
  2. The HTML is sanitized, aggressively removing things that could harm you and your kin—such as script tags, inline-styles, and class or id attributes. See the sanitization filter for the full whitelist.
  3. Syntax highlighting is performed on code blocks. See github/linguist for more information about syntax highlighting.
  4. The HTML is passed through other filters in the html-pipeline that add special sauce, such as emoji, task lists, named anchors, CDN caching for images, and autolinking.
  5. The resulting HTML is rendered on GitHub.com.
Please see our contributing guidelines before reporting an issue.
Markups
The following markups are supported. The dependencies listed are required if
you wish to run the library. You can also run script/bootstrap to fetch them all.
Installation
gem install github-markup

Usage
require'github/markup'GitHub::Markup.render('README.markdown',"* One\n* Two")
Or, more realistically:
require'github/markup'GitHub::Markup.render(file,File.read(file))
Contributing
See Contributing
About
The code we use to render README.your_favorite_markup
Resources
Readme
MIT license
Contributing
Contributing
Activity
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
.ace_editor, .ace_editor *,
.CodeMirror, .CodeMirror *,
.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
.highlight, .highlight *,
pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* 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();
}
// Toggle with Alt+Shift+D
document.addEventListener('keydown', function(e) {
if (e.altKey && e.shiftKey && e.key === 'D') {
e.preventDefault();
enabled = !enabled;
if (enabled) {
applyDarkMode();
console.log('[Universal Dark Mode] Enabled');
} else {
removeDarkMode();
console.log('[Universal Dark Mode] Disabled');
}
}
});
// Apply on load
applyDarkMode();
// Re-apply on dynamic content
var observer = new MutationObserver(function(mutations) {
if (enabled && !document.getElementById('universal-dark-mode-style')) {
applyDarkMode();
}
});
observer.observe(document.head, { childList: true });
console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
})();
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();
GitHub - GreenProgram/markup: The code we use to render README.your_favorite_markup · GitHub
Skip to content
BranchesTags
Repository files navigation
GitHub Markup
This library is the first step of a journey that every markup file in a repository goes on before it is rendered on GitHub.com:
  1. This library converts the raw markup to HTML. See the list of supported markup formats below.
  2. The HTML is sanitized, aggressively removing things that could harm you and your kin—such as script tags, inline-styles, and class or id attributes. See the sanitization filter for the full whitelist.
  3. Syntax highlighting is performed on code blocks. See github/linguist for more information about syntax highlighting.
  4. The HTML is passed through other filters in the html-pipeline that add special sauce, such as emoji, task lists, named anchors, CDN caching for images, and autolinking.
  5. The resulting HTML is rendered on GitHub.com.
Please see our contributing guidelines before reporting an issue.
Markups
The following markups are supported. The dependencies listed are required if
you wish to run the library. You can also run script/bootstrap to fetch them all.
Installation
gem install github-markup

Usage
require'github/markup'GitHub::Markup.render('README.markdown',"* One\n* Two")
Or, more realistically:
require'github/markup'GitHub::Markup.render(file,File.read(file))
Contributing
See Contributing
About
The code we use to render README.your_favorite_markup
Resources
Readme
MIT license
Contributing
Contributing
Activity
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages