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Expressive Code

Expressive Code is an engine for presenting source code on the web, aiming to make your code easy to understand and visually stunning.

On top of accurate syntax highlighting powered by the same engine as VS Code, Expressive Code allows you to annotate code blocks using text markers, diff highlighting, code editor & terminal window frames, and more.

All annotations are based on a powerful plugin architecture that allows you to extend the functionality of Expressive Code with your own custom annotations.

Expressive Code doesn't depend on any client-side framework, is built with performance in mind and designed to be as lightweight as possible.

No matter if you’re writing a blog, guide, or a full documentation website, Expressive Code will help you make your code examples stand out.

Documentation

Read the Expressive Code docs to learn more about the features provided by Expressive Code, which framework integrations are available, and how to use them.

About this repository

This is a monorepo that contains all packages related to Expressive Code. Click on any of the packages below to jump to the respective subfolder.

High-level integration packages

  • rehype-expressive-codeNPM version - A rehype plugin that processes all code blocks in markdown and MDX files with Expressive Code.
  • astro-expressive-codeNPM version - An Astro integration to automatically render code blocks in any markdown / MDX content on your site with Expressive Code. It also provides a <Code> component to render dynamic code blocks.

Default plugins

Additional plugins

Low-level packages for integration authors

  • expressive-codeNPM version - This bundle package provides convenient access to the Expressive Code core engine and all default plugins.
  • @expressive-code/core - The core engine that powers Expressive Code.

Installation, Configuration & Usage

Read the installation instructions to learn how to install Expressive Code.

Contributing

We welcome all contributions! Please read our contributing guide to learn about our development process and how to propose bugfixes and improvements.

About

A text marking & annotation engine for presenting source code on the web.

expressive-code.com/

Resources

Readme
License

Contributing

Contributing
Activity

Stars

0 stars

Watchers

0 watching

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0 forks
Report repository

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, '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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Expressive Code
Expressive Code is an engine for presenting source code on the web, aiming to make your code easy to understand and visually stunning.
On top of accurate syntax highlighting powered by the same engine as VS Code, Expressive Code allows you to annotate code blocks using text markers, diff highlighting, code editor & terminal window frames, and more.
All annotations are based on a powerful plugin architecture that allows you to extend the functionality of Expressive Code with your own custom annotations.
Expressive Code doesn't depend on any client-side framework, is built with performance in mind and designed to be as lightweight as possible.
No matter if you’re writing a blog, guide, or a full documentation website, Expressive Code will help you make your code examples stand out.
Documentation
Read the Expressive Code docs to learn more about the features provided by Expressive Code, which framework integrations are available, and how to use them.
About this repository
This is a monorepo that contains all packages related to Expressive Code. Click on any of the packages below to jump to the respective subfolder.
High-level integration packages
  • rehype-expressive-codeNPM version - A rehype plugin that processes all code blocks in markdown and MDX files with Expressive Code.
  • astro-expressive-codeNPM version - An Astro integration to automatically render code blocks in any markdown / MDX content on your site with Expressive Code. It also provides a <Code> component to render dynamic code blocks.
Default plugins
Additional plugins
Low-level packages for integration authors
  • expressive-codeNPM version - This bundle package provides convenient access to the Expressive Code core engine and all default plugins.
  • @expressive-code/core - The core engine that powers Expressive Code.
Installation, Configuration & Usage
Read the installation instructions to learn how to install Expressive Code.
Contributing
We welcome all contributions! Please read our contributing guide to learn about our development process and how to propose bugfixes and improvements.
About
A text marking & annotation engine for presenting source code on the web.
expressive-code.com/
Resources
Readme
License
Contributing
Contributing
Activity
Stars
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Watchers
0 watching
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0 forks
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, '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
BranchesTags
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Expressive Code
Expressive Code is an engine for presenting source code on the web, aiming to make your code easy to understand and visually stunning.
On top of accurate syntax highlighting powered by the same engine as VS Code, Expressive Code allows you to annotate code blocks using text markers, diff highlighting, code editor & terminal window frames, and more.
All annotations are based on a powerful plugin architecture that allows you to extend the functionality of Expressive Code with your own custom annotations.
Expressive Code doesn't depend on any client-side framework, is built with performance in mind and designed to be as lightweight as possible.
No matter if you’re writing a blog, guide, or a full documentation website, Expressive Code will help you make your code examples stand out.
Documentation
Read the Expressive Code docs to learn more about the features provided by Expressive Code, which framework integrations are available, and how to use them.
About this repository
This is a monorepo that contains all packages related to Expressive Code. Click on any of the packages below to jump to the respective subfolder.
High-level integration packages
  • rehype-expressive-codeNPM version - A rehype plugin that processes all code blocks in markdown and MDX files with Expressive Code.
  • astro-expressive-codeNPM version - An Astro integration to automatically render code blocks in any markdown / MDX content on your site with Expressive Code. It also provides a <Code> component to render dynamic code blocks.
Default plugins
Additional plugins
Low-level packages for integration authors
  • expressive-codeNPM version - This bundle package provides convenient access to the Expressive Code core engine and all default plugins.
  • @expressive-code/core - The core engine that powers Expressive Code.
Installation, Configuration & Usage
Read the installation instructions to learn how to install Expressive Code.
Contributing
We welcome all contributions! Please read our contributing guide to learn about our development process and how to propose bugfixes and improvements.
About
A text marking & annotation engine for presenting source code on the web.
expressive-code.com/
Resources
Readme
License
Contributing
Contributing
Activity
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, '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
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Expressive Code
Expressive Code is an engine for presenting source code on the web, aiming to make your code easy to understand and visually stunning.
On top of accurate syntax highlighting powered by the same engine as VS Code, Expressive Code allows you to annotate code blocks using text markers, diff highlighting, code editor & terminal window frames, and more.
All annotations are based on a powerful plugin architecture that allows you to extend the functionality of Expressive Code with your own custom annotations.
Expressive Code doesn't depend on any client-side framework, is built with performance in mind and designed to be as lightweight as possible.
No matter if you’re writing a blog, guide, or a full documentation website, Expressive Code will help you make your code examples stand out.
Documentation
Read the Expressive Code docs to learn more about the features provided by Expressive Code, which framework integrations are available, and how to use them.
About this repository
This is a monorepo that contains all packages related to Expressive Code. Click on any of the packages below to jump to the respective subfolder.
High-level integration packages
  • rehype-expressive-codeNPM version - A rehype plugin that processes all code blocks in markdown and MDX files with Expressive Code.
  • astro-expressive-codeNPM version - An Astro integration to automatically render code blocks in any markdown / MDX content on your site with Expressive Code. It also provides a <Code> component to render dynamic code blocks.
Default plugins
Additional plugins
Low-level packages for integration authors
  • expressive-codeNPM version - This bundle package provides convenient access to the Expressive Code core engine and all default plugins.
  • @expressive-code/core - The core engine that powers Expressive Code.
Installation, Configuration & Usage
Read the installation instructions to learn how to install Expressive Code.
Contributing
We welcome all contributions! Please read our contributing guide to learn about our development process and how to propose bugfixes and improvements.
About
A text marking & annotation engine for presenting source code on the web.
expressive-code.com/
Resources
Readme
License
Contributing
Contributing
Activity
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
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Contributors
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, '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
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Expressive Code
Expressive Code is an engine for presenting source code on the web, aiming to make your code easy to understand and visually stunning.
On top of accurate syntax highlighting powered by the same engine as VS Code, Expressive Code allows you to annotate code blocks using text markers, diff highlighting, code editor & terminal window frames, and more.
All annotations are based on a powerful plugin architecture that allows you to extend the functionality of Expressive Code with your own custom annotations.
Expressive Code doesn't depend on any client-side framework, is built with performance in mind and designed to be as lightweight as possible.
No matter if you’re writing a blog, guide, or a full documentation website, Expressive Code will help you make your code examples stand out.
Documentation
Read the Expressive Code docs to learn more about the features provided by Expressive Code, which framework integrations are available, and how to use them.
About this repository
This is a monorepo that contains all packages related to Expressive Code. Click on any of the packages below to jump to the respective subfolder.
High-level integration packages
  • rehype-expressive-codeNPM version - A rehype plugin that processes all code blocks in markdown and MDX files with Expressive Code.
  • astro-expressive-codeNPM version - An Astro integration to automatically render code blocks in any markdown / MDX content on your site with Expressive Code. It also provides a <Code> component to render dynamic code blocks.
Default plugins
Additional plugins
Low-level packages for integration authors
  • expressive-codeNPM version - This bundle package provides convenient access to the Expressive Code core engine and all default plugins.
  • @expressive-code/core - The core engine that powers Expressive Code.
Installation, Configuration & Usage
Read the installation instructions to learn how to install Expressive Code.
Contributing
We welcome all contributions! Please read our contributing guide to learn about our development process and how to propose bugfixes and improvements.
About
A text marking & annotation engine for presenting source code on the web.
expressive-code.com/
Resources
Readme
License
Contributing
Contributing
Activity
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, '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
Expressive Code
Expressive Code is an engine for presenting source code on the web, aiming to make your code easy to understand and visually stunning.
On top of accurate syntax highlighting powered by the same engine as VS Code, Expressive Code allows you to annotate code blocks using text markers, diff highlighting, code editor & terminal window frames, and more.
All annotations are based on a powerful plugin architecture that allows you to extend the functionality of Expressive Code with your own custom annotations.
Expressive Code doesn't depend on any client-side framework, is built with performance in mind and designed to be as lightweight as possible.
No matter if you’re writing a blog, guide, or a full documentation website, Expressive Code will help you make your code examples stand out.
Documentation
Read the Expressive Code docs to learn more about the features provided by Expressive Code, which framework integrations are available, and how to use them.
About this repository
This is a monorepo that contains all packages related to Expressive Code. Click on any of the packages below to jump to the respective subfolder.
High-level integration packages
  • rehype-expressive-codeNPM version - A rehype plugin that processes all code blocks in markdown and MDX files with Expressive Code.
  • astro-expressive-codeNPM version - An Astro integration to automatically render code blocks in any markdown / MDX content on your site with Expressive Code. It also provides a <Code> component to render dynamic code blocks.
Default plugins
Additional plugins
Low-level packages for integration authors
  • expressive-codeNPM version - This bundle package provides convenient access to the Expressive Code core engine and all default plugins.
  • @expressive-code/core - The core engine that powers Expressive Code.
Installation, Configuration & Usage
Read the installation instructions to learn how to install Expressive Code.
Contributing
We welcome all contributions! Please read our contributing guide to learn about our development process and how to propose bugfixes and improvements.
About
A text marking & annotation engine for presenting source code on the web.
expressive-code.com/
Resources
Readme
License
Contributing
Contributing
Activity
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, '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
Expressive Code
Expressive Code is an engine for presenting source code on the web, aiming to make your code easy to understand and visually stunning.
On top of accurate syntax highlighting powered by the same engine as VS Code, Expressive Code allows you to annotate code blocks using text markers, diff highlighting, code editor & terminal window frames, and more.
All annotations are based on a powerful plugin architecture that allows you to extend the functionality of Expressive Code with your own custom annotations.
Expressive Code doesn't depend on any client-side framework, is built with performance in mind and designed to be as lightweight as possible.
No matter if you’re writing a blog, guide, or a full documentation website, Expressive Code will help you make your code examples stand out.
Documentation
Read the Expressive Code docs to learn more about the features provided by Expressive Code, which framework integrations are available, and how to use them.
About this repository
This is a monorepo that contains all packages related to Expressive Code. Click on any of the packages below to jump to the respective subfolder.
High-level integration packages
  • rehype-expressive-codeNPM version - A rehype plugin that processes all code blocks in markdown and MDX files with Expressive Code.
  • astro-expressive-codeNPM version - An Astro integration to automatically render code blocks in any markdown / MDX content on your site with Expressive Code. It also provides a <Code> component to render dynamic code blocks.
Default plugins
Additional plugins
Low-level packages for integration authors
  • expressive-codeNPM version - This bundle package provides convenient access to the Expressive Code core engine and all default plugins.
  • @expressive-code/core - The core engine that powers Expressive Code.
Installation, Configuration & Usage
Read the installation instructions to learn how to install Expressive Code.
Contributing
We welcome all contributions! Please read our contributing guide to learn about our development process and how to propose bugfixes and improvements.
About
A text marking & annotation engine for presenting source code on the web.
expressive-code.com/
Resources
Readme
License
Contributing
Contributing
Activity
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, '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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Expressive Code
Expressive Code is an engine for presenting source code on the web, aiming to make your code easy to understand and visually stunning.
On top of accurate syntax highlighting powered by the same engine as VS Code, Expressive Code allows you to annotate code blocks using text markers, diff highlighting, code editor & terminal window frames, and more.
All annotations are based on a powerful plugin architecture that allows you to extend the functionality of Expressive Code with your own custom annotations.
Expressive Code doesn't depend on any client-side framework, is built with performance in mind and designed to be as lightweight as possible.
No matter if you’re writing a blog, guide, or a full documentation website, Expressive Code will help you make your code examples stand out.
Documentation
Read the Expressive Code docs to learn more about the features provided by Expressive Code, which framework integrations are available, and how to use them.
About this repository
This is a monorepo that contains all packages related to Expressive Code. Click on any of the packages below to jump to the respective subfolder.
High-level integration packages
  • rehype-expressive-codeNPM version - A rehype plugin that processes all code blocks in markdown and MDX files with Expressive Code.
  • astro-expressive-codeNPM version - An Astro integration to automatically render code blocks in any markdown / MDX content on your site with Expressive Code. It also provides a <Code> component to render dynamic code blocks.
Default plugins
Additional plugins
Low-level packages for integration authors
  • expressive-codeNPM version - This bundle package provides convenient access to the Expressive Code core engine and all default plugins.
  • @expressive-code/core - The core engine that powers Expressive Code.
Installation, Configuration & Usage
Read the installation instructions to learn how to install Expressive Code.
Contributing
We welcome all contributions! Please read our contributing guide to learn about our development process and how to propose bugfixes and improvements.
About
A text marking & annotation engine for presenting source code on the web.
expressive-code.com/
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