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Flutter Engine

Build Status - Cirrus

Flutter is Google's mobile app SDK for crafting high-quality native interfaces on iOS and Android in record time. Flutter works with existing code, is used by developers and organizations around the world, and is free and open source.

The Flutter Engine is a portable runtime for hosting Flutter applications. It implements Flutter's core libraries, including animation and graphics, file and network I/O, accessibility support, plugin architecture, and a Dart runtime and compile toolchain. Most developers will interact with Flutter via the Flutter Framework, which provides a modern, reactive framework, and a rich set of platform, layout and foundation widgets.

If you are new to Flutter, then you will find more general information on the Flutter project, including tutorials and samples, on our Web site at Flutter.dev. For specific information about Flutter's APIs, consider our API reference which can be found at the docs.flutter.dev.

Flutter is a fully open source project, and we welcome contributions. Information on how to get started can be found at our contributor guide.

About

The Flutter engine

flutter.dev

Resources

Readme
BSD-3-Clause license

Contributing

Contributing
Activity
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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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Flutter Engine
Build Status - Cirrus
Flutter is Google's mobile app SDK for crafting high-quality native interfaces
on iOS and Android in record time. Flutter works with existing code, is used by
developers and organizations around the world, and is free and open source.
The Flutter Engine is a portable runtime for hosting
Flutter applications. It implements Flutter's core
libraries, including animation and graphics, file and network I/O,
accessibility support, plugin architecture, and a Dart runtime and compile
toolchain. Most developers will interact with Flutter via the Flutter
Framework, which provides a modern,
reactive framework, and a rich set of platform, layout and foundation widgets.
If you are new to Flutter, then you will find more general information
on the Flutter project, including tutorials and samples, on our Web
site at Flutter.dev. For specific information
about Flutter's APIs, consider our API reference which can be found at
the docs.flutter.dev.
Flutter is a fully open source project, and we welcome contributions.
Information on how to get started can be found at our
contributor guide.
About
The Flutter engine
flutter.dev
Resources
Readme
BSD-3-Clause license
Contributing
Contributing
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
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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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Flutter Engine
Build Status - Cirrus
Flutter is Google's mobile app SDK for crafting high-quality native interfaces
on iOS and Android in record time. Flutter works with existing code, is used by
developers and organizations around the world, and is free and open source.
The Flutter Engine is a portable runtime for hosting
Flutter applications. It implements Flutter's core
libraries, including animation and graphics, file and network I/O,
accessibility support, plugin architecture, and a Dart runtime and compile
toolchain. Most developers will interact with Flutter via the Flutter
Framework, which provides a modern,
reactive framework, and a rich set of platform, layout and foundation widgets.
If you are new to Flutter, then you will find more general information
on the Flutter project, including tutorials and samples, on our Web
site at Flutter.dev. For specific information
about Flutter's APIs, consider our API reference which can be found at
the docs.flutter.dev.
Flutter is a fully open source project, and we welcome contributions.
Information on how to get started can be found at our
contributor guide.
About
The Flutter engine
flutter.dev
Resources
Readme
BSD-3-Clause license
Contributing
Contributing
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
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, '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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Flutter Engine
Build Status - Cirrus
Flutter is Google's mobile app SDK for crafting high-quality native interfaces
on iOS and Android in record time. Flutter works with existing code, is used by
developers and organizations around the world, and is free and open source.
The Flutter Engine is a portable runtime for hosting
Flutter applications. It implements Flutter's core
libraries, including animation and graphics, file and network I/O,
accessibility support, plugin architecture, and a Dart runtime and compile
toolchain. Most developers will interact with Flutter via the Flutter
Framework, which provides a modern,
reactive framework, and a rich set of platform, layout and foundation widgets.
If you are new to Flutter, then you will find more general information
on the Flutter project, including tutorials and samples, on our Web
site at Flutter.dev. For specific information
about Flutter's APIs, consider our API reference which can be found at
the docs.flutter.dev.
Flutter is a fully open source project, and we welcome contributions.
Information on how to get started can be found at our
contributor guide.
About
The Flutter engine
flutter.dev
Resources
Readme
BSD-3-Clause license
Contributing
Contributing
Activity
Custom properties
Stars
0 stars
Watchers
0 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" + '

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BranchesTags
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Flutter Engine
Build Status - Cirrus
Flutter is Google's mobile app SDK for crafting high-quality native interfaces
on iOS and Android in record time. Flutter works with existing code, is used by
developers and organizations around the world, and is free and open source.
The Flutter Engine is a portable runtime for hosting
Flutter applications. It implements Flutter's core
libraries, including animation and graphics, file and network I/O,
accessibility support, plugin architecture, and a Dart runtime and compile
toolchain. Most developers will interact with Flutter via the Flutter
Framework, which provides a modern,
reactive framework, and a rich set of platform, layout and foundation widgets.
If you are new to Flutter, then you will find more general information
on the Flutter project, including tutorials and samples, on our Web
site at Flutter.dev. For specific information
about Flutter's APIs, consider our API reference which can be found at
the docs.flutter.dev.
Flutter is a fully open source project, and we welcome contributions.
Information on how to get started can be found at our
contributor guide.
About
The Flutter engine
flutter.dev
Resources
Readme
BSD-3-Clause license
Contributing
Contributing
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
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, '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
Flutter Engine
Build Status - Cirrus
Flutter is Google's mobile app SDK for crafting high-quality native interfaces
on iOS and Android in record time. Flutter works with existing code, is used by
developers and organizations around the world, and is free and open source.
The Flutter Engine is a portable runtime for hosting
Flutter applications. It implements Flutter's core
libraries, including animation and graphics, file and network I/O,
accessibility support, plugin architecture, and a Dart runtime and compile
toolchain. Most developers will interact with Flutter via the Flutter
Framework, which provides a modern,
reactive framework, and a rich set of platform, layout and foundation widgets.
If you are new to Flutter, then you will find more general information
on the Flutter project, including tutorials and samples, on our Web
site at Flutter.dev. For specific information
about Flutter's APIs, consider our API reference which can be found at
the docs.flutter.dev.
Flutter is a fully open source project, and we welcome contributions.
Information on how to get started can be found at our
contributor guide.
About
The Flutter engine
flutter.dev
Resources
Readme
BSD-3-Clause license
Contributing
Contributing
Activity
Custom properties
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
Flutter Engine
Build Status - Cirrus
Flutter is Google's mobile app SDK for crafting high-quality native interfaces
on iOS and Android in record time. Flutter works with existing code, is used by
developers and organizations around the world, and is free and open source.
The Flutter Engine is a portable runtime for hosting
Flutter applications. It implements Flutter's core
libraries, including animation and graphics, file and network I/O,
accessibility support, plugin architecture, and a Dart runtime and compile
toolchain. Most developers will interact with Flutter via the Flutter
Framework, which provides a modern,
reactive framework, and a rich set of platform, layout and foundation widgets.
If you are new to Flutter, then you will find more general information
on the Flutter project, including tutorials and samples, on our Web
site at Flutter.dev. For specific information
about Flutter's APIs, consider our API reference which can be found at
the docs.flutter.dev.
Flutter is a fully open source project, and we welcome contributions.
Information on how to get started can be found at our
contributor guide.
About
The Flutter engine
flutter.dev
Resources
Readme
BSD-3-Clause license
Contributing
Contributing
Activity
Custom properties
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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Flutter Engine
Build Status - Cirrus
Flutter is Google's mobile app SDK for crafting high-quality native interfaces
on iOS and Android in record time. Flutter works with existing code, is used by
developers and organizations around the world, and is free and open source.
The Flutter Engine is a portable runtime for hosting
Flutter applications. It implements Flutter's core
libraries, including animation and graphics, file and network I/O,
accessibility support, plugin architecture, and a Dart runtime and compile
toolchain. Most developers will interact with Flutter via the Flutter
Framework, which provides a modern,
reactive framework, and a rich set of platform, layout and foundation widgets.
If you are new to Flutter, then you will find more general information
on the Flutter project, including tutorials and samples, on our Web
site at Flutter.dev. For specific information
about Flutter's APIs, consider our API reference which can be found at
the docs.flutter.dev.
Flutter is a fully open source project, and we welcome contributions.
Information on how to get started can be found at our
contributor guide.
About
The Flutter engine
flutter.dev
Resources
Readme
BSD-3-Clause license
Contributing
Contributing
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages