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CSS Webpack Plugin - Style the modern web

​ Styling a modern application is no simple task - traditionally it is done by serving HTML with CSS for styling, and sprinkling the web app with Javascript to get the job done. The question is how to modernize the approach of setting up an app, and the answer is to use a bundler like Webpack and JavaScript framework / library like React. But how do we handle the CSS, and why is it not that simple as you would expect?

Agenda -

If you are here just for implementation information, skip to part 3. ​ Disclaimer - This is not a production-ready plugin. To see one that is, check out what my team and I are working on: Stylable ​

Development

​ This project is written as a Yarn workspace with TypeScript, and contains two main packages: ​

- css-loader
- css-plugin

​ For examples of different frameworks, see examples. ​

Bootstrap

​

yarn
yarn build

​

Testing

​ The package css-loader has integration tests to ensure the correct output is received from the loader. ​ Inside the css-plugin package is an e2e test that creates a project, serves it with playwright, and makes sure that the UI works according to the output.

About

A short guide for creating a CSS Webpack loader and plugin.

Topics

csshtmljavascriptpreprocessorreactsassstylabletestingtypescriptvuewebpack

Resources

Readme
Activity

Stars

1 star

Watchers

1 watching

Forks

0 forks
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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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CSS Webpack Plugin - Style the modern web
​
Styling a modern application is no simple task - traditionally it is done by serving HTML with CSS for styling, and sprinkling the web app with Javascript to get the job done.
The question is how to modernize the approach of setting up an app, and the answer is to use a bundler like Webpack and JavaScript framework / library like React. But how do we handle the CSS, and why is it not that simple as you would expect?
Agenda -
If you are here just for implementation information, skip to part 3.
​
Disclaimer - This is not a production-ready plugin. To see one that is, check out what my team and I are working on: Stylable
​
Development
​
This project is written as a Yarn workspace with TypeScript, and contains two main packages:
​
- css-loader
- css-plugin

​
For examples of different frameworks, see examples.
​
Bootstrap
​
yarn
yarn build
​
Testing
​
The package css-loader has integration tests to ensure the correct output is received from the loader.
​
Inside the css-plugin package is an e2e test that creates a project, serves it with playwright, and makes sure that the UI works according to the output.
About
A short guide for creating a CSS Webpack loader and plugin.
Topics
csshtmljavascriptpreprocessorreactsassstylabletestingtypescriptvuewebpack
Resources
Readme
Activity
Stars
1 star
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
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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('^' + ".*" + '

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CSS Webpack Plugin - Style the modern web
​
Styling a modern application is no simple task - traditionally it is done by serving HTML with CSS for styling, and sprinkling the web app with Javascript to get the job done.
The question is how to modernize the approach of setting up an app, and the answer is to use a bundler like Webpack and JavaScript framework / library like React. But how do we handle the CSS, and why is it not that simple as you would expect?
Agenda -
If you are here just for implementation information, skip to part 3.
​
Disclaimer - This is not a production-ready plugin. To see one that is, check out what my team and I are working on: Stylable
​
Development
​
This project is written as a Yarn workspace with TypeScript, and contains two main packages:
​
- css-loader
- css-plugin

​
For examples of different frameworks, see examples.
​
Bootstrap
​
yarn
yarn build
​
Testing
​
The package css-loader has integration tests to ensure the correct output is received from the loader.
​
Inside the css-plugin package is an e2e test that creates a project, serves it with playwright, and makes sure that the UI works according to the output.
About
A short guide for creating a CSS Webpack loader and plugin.
Topics
csshtmljavascriptpreprocessorreactsassstylabletestingtypescriptvuewebpack
Resources
Readme
Activity
Stars
1 star
Watchers
1 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('^' + ".*" + '

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BranchesTags
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CSS Webpack Plugin - Style the modern web
​
Styling a modern application is no simple task - traditionally it is done by serving HTML with CSS for styling, and sprinkling the web app with Javascript to get the job done.
The question is how to modernize the approach of setting up an app, and the answer is to use a bundler like Webpack and JavaScript framework / library like React. But how do we handle the CSS, and why is it not that simple as you would expect?
Agenda -
If you are here just for implementation information, skip to part 3.
​
Disclaimer - This is not a production-ready plugin. To see one that is, check out what my team and I are working on: Stylable
​
Development
​
This project is written as a Yarn workspace with TypeScript, and contains two main packages:
​
- css-loader
- css-plugin

​
For examples of different frameworks, see examples.
​
Bootstrap
​
yarn
yarn build
​
Testing
​
The package css-loader has integration tests to ensure the correct output is received from the loader.
​
Inside the css-plugin package is an e2e test that creates a project, serves it with playwright, and makes sure that the UI works according to the output.
About
A short guide for creating a CSS Webpack loader and plugin.
Topics
csshtmljavascriptpreprocessorreactsassstylabletestingtypescriptvuewebpack
Resources
Readme
Activity
Stars
1 star
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, '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
BranchesTags
Repository files navigation
CSS Webpack Plugin - Style the modern web
​
Styling a modern application is no simple task - traditionally it is done by serving HTML with CSS for styling, and sprinkling the web app with Javascript to get the job done.
The question is how to modernize the approach of setting up an app, and the answer is to use a bundler like Webpack and JavaScript framework / library like React. But how do we handle the CSS, and why is it not that simple as you would expect?
Agenda -
If you are here just for implementation information, skip to part 3.
​
Disclaimer - This is not a production-ready plugin. To see one that is, check out what my team and I are working on: Stylable
​
Development
​
This project is written as a Yarn workspace with TypeScript, and contains two main packages:
​
- css-loader
- css-plugin

​
For examples of different frameworks, see examples.
​
Bootstrap
​
yarn
yarn build
​
Testing
​
The package css-loader has integration tests to ensure the correct output is received from the loader.
​
Inside the css-plugin package is an e2e test that creates a project, serves it with playwright, and makes sure that the UI works according to the output.
About
A short guide for creating a CSS Webpack loader and plugin.
Topics
csshtmljavascriptpreprocessorreactsassstylabletestingtypescriptvuewebpack
Resources
Readme
Activity
Stars
1 star
Watchers
1 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
CSS Webpack Plugin - Style the modern web
​
Styling a modern application is no simple task - traditionally it is done by serving HTML with CSS for styling, and sprinkling the web app with Javascript to get the job done.
The question is how to modernize the approach of setting up an app, and the answer is to use a bundler like Webpack and JavaScript framework / library like React. But how do we handle the CSS, and why is it not that simple as you would expect?
Agenda -
If you are here just for implementation information, skip to part 3.
​
Disclaimer - This is not a production-ready plugin. To see one that is, check out what my team and I are working on: Stylable
​
Development
​
This project is written as a Yarn workspace with TypeScript, and contains two main packages:
​
- css-loader
- css-plugin

​
For examples of different frameworks, see examples.
​
Bootstrap
​
yarn
yarn build
​
Testing
​
The package css-loader has integration tests to ensure the correct output is received from the loader.
​
Inside the css-plugin package is an e2e test that creates a project, serves it with playwright, and makes sure that the UI works according to the output.
About
A short guide for creating a CSS Webpack loader and plugin.
Topics
csshtmljavascriptpreprocessorreactsassstylabletestingtypescriptvuewebpack
Resources
Readme
Activity
Stars
1 star
Watchers
1 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
CSS Webpack Plugin - Style the modern web
​
Styling a modern application is no simple task - traditionally it is done by serving HTML with CSS for styling, and sprinkling the web app with Javascript to get the job done.
The question is how to modernize the approach of setting up an app, and the answer is to use a bundler like Webpack and JavaScript framework / library like React. But how do we handle the CSS, and why is it not that simple as you would expect?
Agenda -
If you are here just for implementation information, skip to part 3.
​
Disclaimer - This is not a production-ready plugin. To see one that is, check out what my team and I are working on: Stylable
​
Development
​
This project is written as a Yarn workspace with TypeScript, and contains two main packages:
​
- css-loader
- css-plugin

​
For examples of different frameworks, see examples.
​
Bootstrap
​
yarn
yarn build
​
Testing
​
The package css-loader has integration tests to ensure the correct output is received from the loader.
​
Inside the css-plugin package is an e2e test that creates a project, serves it with playwright, and makes sure that the UI works according to the output.
About
A short guide for creating a CSS Webpack loader and plugin.
Topics
csshtmljavascriptpreprocessorreactsassstylabletestingtypescriptvuewebpack
Resources
Readme
Activity
Stars
1 star
Watchers
1 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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BranchesTags
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CSS Webpack Plugin - Style the modern web
​
Styling a modern application is no simple task - traditionally it is done by serving HTML with CSS for styling, and sprinkling the web app with Javascript to get the job done.
The question is how to modernize the approach of setting up an app, and the answer is to use a bundler like Webpack and JavaScript framework / library like React. But how do we handle the CSS, and why is it not that simple as you would expect?
Agenda -
If you are here just for implementation information, skip to part 3.
​
Disclaimer - This is not a production-ready plugin. To see one that is, check out what my team and I are working on: Stylable
​
Development
​
This project is written as a Yarn workspace with TypeScript, and contains two main packages:
​
- css-loader
- css-plugin

​
For examples of different frameworks, see examples.
​
Bootstrap
​
yarn
yarn build
​
Testing
​
The package css-loader has integration tests to ensure the correct output is received from the loader.
​
Inside the css-plugin package is an e2e test that creates a project, serves it with playwright, and makes sure that the UI works according to the output.
About
A short guide for creating a CSS Webpack loader and plugin.
Topics
csshtmljavascriptpreprocessorreactsassstylabletestingtypescriptvuewebpack
Resources
Readme
Activity
Stars
1 star
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages