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fresh

NPM VersionNPM DownloadsNode.js VersionBuild StatusTest Coverage

HTTP response freshness testing

Installation

This is a Node.js module available through the npm registry. Installation is done using the npm install command:

$ npm install fresh

API

varfresh=require('fresh')

fresh(reqHeaders, resHeaders)

Check freshness of the response using request and response headers.

When the response is still "fresh" in the client's cache true is returned, otherwise false is returned to indicate that the client cache is now stale and the full response should be sent.

When a client sends the Cache-Control: no-cache request header to indicate an end-to-end reload request, this module will return false to make handling these requests transparent.

Known Issues

This module is designed to only follow the HTTP specifications, not to work-around all kinds of client bugs (especially since this module typically does not receive enough information to understand what the client actually is).

There is a known issue that in certain versions of Safari, Safari will incorrectly make a request that allows this module to validate freshness of the resource even when Safari does not have a representation of the resource in the cache. The module jumanji can be used in an Express application to work-around this issue and also provides links to further reading on this Safari bug.

Example

API usage

varreqHeaders={'if-none-match': '"foo"'}varresHeaders={etag: '"bar"'}fresh(reqHeaders,resHeaders)// => falsevarreqHeaders={'if-none-match': '"foo"'}varresHeaders={etag: '"foo"'}fresh(reqHeaders,resHeaders)// => true

Using with Node.js http server

varfresh=require('fresh')varhttp=require('http')varserver=http.createServer(function(req,res){// perform server logic// ... including adding ETag / Last-Modified response headersif(isFresh(req,res)){// client has a fresh copy of resourceres.statusCode=304res.end()return}// send the resourceres.statusCode=200res.end('hello, world!')})functionisFresh(req,res){returnfresh(req.headers,{etag: res.getHeader('ETag'),'last-modified': res.getHeader('Last-Modified')})}server.listen(3000)

License

MIT

About

HTTP request freshness testing

Topics

304etaghttpjavascriptlast-modifiednodejs

Resources

Readme
MIT license

Code of conduct

Code of conduct

Security policy

Security policy
Activity
Custom properties

Stars

162 stars

Watchers

10 watching

Forks

34 forks
Report repository

Releases

Packages

Used by

Contributors

Languages

, '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" + '

Skip to content
BranchesTags
Repository files navigation
fresh
NPM VersionNPM DownloadsNode.js VersionBuild StatusTest Coverage
HTTP response freshness testing
Installation
This is a Node.js module available through the
npm registry. Installation is done using the
npm install command:
$ npm install fresh

API
varfresh=require('fresh')
fresh(reqHeaders, resHeaders)
Check freshness of the response using request and response headers.
When the response is still "fresh" in the client's cache true is
returned, otherwise false is returned to indicate that the client
cache is now stale and the full response should be sent.
When a client sends the Cache-Control: no-cache request header to
indicate an end-to-end reload request, this module will return false
to make handling these requests transparent.
Known Issues
This module is designed to only follow the HTTP specifications, not
to work-around all kinds of client bugs (especially since this module
typically does not receive enough information to understand what the
client actually is).
There is a known issue that in certain versions of Safari, Safari
will incorrectly make a request that allows this module to validate
freshness of the resource even when Safari does not have a
representation of the resource in the cache. The module
jumanji can be used in
an Express application to work-around this issue and also provides
links to further reading on this Safari bug.
Example
API usage
varreqHeaders={'if-none-match': '"foo"'}varresHeaders={etag: '"bar"'}fresh(reqHeaders,resHeaders)// => falsevarreqHeaders={'if-none-match': '"foo"'}varresHeaders={etag: '"foo"'}fresh(reqHeaders,resHeaders)// => true
Using with Node.js http server
varfresh=require('fresh')varhttp=require('http')varserver=http.createServer(function(req,res){// perform server logic// ... including adding ETag / Last-Modified response headersif(isFresh(req,res)){// client has a fresh copy of resourceres.statusCode=304res.end()return}// send the resourceres.statusCode=200res.end('hello, world!')})functionisFresh(req,res){returnfresh(req.headers,{etag: res.getHeader('ETag'),'last-modified': res.getHeader('Last-Modified')})}server.listen(3000)
License
MIT
About
HTTP request freshness testing
Topics
304etaghttpjavascriptlast-modifiednodejs
Resources
Readme
MIT license
Code of conduct
Code of conduct
Security policy
Security policy
Activity
Custom properties
Stars
162 stars
Watchers
10 watching
Forks
34 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, '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
Repository files navigation
fresh
NPM VersionNPM DownloadsNode.js VersionBuild StatusTest Coverage
HTTP response freshness testing
Installation
This is a Node.js module available through the
npm registry. Installation is done using the
npm install command:
$ npm install fresh

API
varfresh=require('fresh')
fresh(reqHeaders, resHeaders)
Check freshness of the response using request and response headers.
When the response is still "fresh" in the client's cache true is
returned, otherwise false is returned to indicate that the client
cache is now stale and the full response should be sent.
When a client sends the Cache-Control: no-cache request header to
indicate an end-to-end reload request, this module will return false
to make handling these requests transparent.
Known Issues
This module is designed to only follow the HTTP specifications, not
to work-around all kinds of client bugs (especially since this module
typically does not receive enough information to understand what the
client actually is).
There is a known issue that in certain versions of Safari, Safari
will incorrectly make a request that allows this module to validate
freshness of the resource even when Safari does not have a
representation of the resource in the cache. The module
jumanji can be used in
an Express application to work-around this issue and also provides
links to further reading on this Safari bug.
Example
API usage
varreqHeaders={'if-none-match': '"foo"'}varresHeaders={etag: '"bar"'}fresh(reqHeaders,resHeaders)// => falsevarreqHeaders={'if-none-match': '"foo"'}varresHeaders={etag: '"foo"'}fresh(reqHeaders,resHeaders)// => true
Using with Node.js http server
varfresh=require('fresh')varhttp=require('http')varserver=http.createServer(function(req,res){// perform server logic// ... including adding ETag / Last-Modified response headersif(isFresh(req,res)){// client has a fresh copy of resourceres.statusCode=304res.end()return}// send the resourceres.statusCode=200res.end('hello, world!')})functionisFresh(req,res){returnfresh(req.headers,{etag: res.getHeader('ETag'),'last-modified': res.getHeader('Last-Modified')})}server.listen(3000)
License
MIT
About
HTTP request freshness testing
Topics
304etaghttpjavascriptlast-modifiednodejs
Resources
Readme
MIT license
Code of conduct
Code of conduct
Security policy
Security policy
Activity
Custom properties
Stars
162 stars
Watchers
10 watching
Forks
34 forks
Report repository
Releases
Packages
Used by
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
BranchesTags
Repository files navigation
fresh
NPM VersionNPM DownloadsNode.js VersionBuild StatusTest Coverage
HTTP response freshness testing
Installation
This is a Node.js module available through the
npm registry. Installation is done using the
npm install command:
$ npm install fresh

API
varfresh=require('fresh')
fresh(reqHeaders, resHeaders)
Check freshness of the response using request and response headers.
When the response is still "fresh" in the client's cache true is
returned, otherwise false is returned to indicate that the client
cache is now stale and the full response should be sent.
When a client sends the Cache-Control: no-cache request header to
indicate an end-to-end reload request, this module will return false
to make handling these requests transparent.
Known Issues
This module is designed to only follow the HTTP specifications, not
to work-around all kinds of client bugs (especially since this module
typically does not receive enough information to understand what the
client actually is).
There is a known issue that in certain versions of Safari, Safari
will incorrectly make a request that allows this module to validate
freshness of the resource even when Safari does not have a
representation of the resource in the cache. The module
jumanji can be used in
an Express application to work-around this issue and also provides
links to further reading on this Safari bug.
Example
API usage
varreqHeaders={'if-none-match': '"foo"'}varresHeaders={etag: '"bar"'}fresh(reqHeaders,resHeaders)// => falsevarreqHeaders={'if-none-match': '"foo"'}varresHeaders={etag: '"foo"'}fresh(reqHeaders,resHeaders)// => true
Using with Node.js http server
varfresh=require('fresh')varhttp=require('http')varserver=http.createServer(function(req,res){// perform server logic// ... including adding ETag / Last-Modified response headersif(isFresh(req,res)){// client has a fresh copy of resourceres.statusCode=304res.end()return}// send the resourceres.statusCode=200res.end('hello, world!')})functionisFresh(req,res){returnfresh(req.headers,{etag: res.getHeader('ETag'),'last-modified': res.getHeader('Last-Modified')})}server.listen(3000)
License
MIT
About
HTTP request freshness testing
Topics
304etaghttpjavascriptlast-modifiednodejs
Resources
Readme
MIT license
Code of conduct
Code of conduct
Security policy
Security policy
Activity
Custom properties
Stars
162 stars
Watchers
10 watching
Forks
34 forks
Report repository
Releases
Packages
Used by
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
fresh
NPM VersionNPM DownloadsNode.js VersionBuild StatusTest Coverage
HTTP response freshness testing
Installation
This is a Node.js module available through the
npm registry. Installation is done using the
npm install command:
$ npm install fresh

API
varfresh=require('fresh')
fresh(reqHeaders, resHeaders)
Check freshness of the response using request and response headers.
When the response is still "fresh" in the client's cache true is
returned, otherwise false is returned to indicate that the client
cache is now stale and the full response should be sent.
When a client sends the Cache-Control: no-cache request header to
indicate an end-to-end reload request, this module will return false
to make handling these requests transparent.
Known Issues
This module is designed to only follow the HTTP specifications, not
to work-around all kinds of client bugs (especially since this module
typically does not receive enough information to understand what the
client actually is).
There is a known issue that in certain versions of Safari, Safari
will incorrectly make a request that allows this module to validate
freshness of the resource even when Safari does not have a
representation of the resource in the cache. The module
jumanji can be used in
an Express application to work-around this issue and also provides
links to further reading on this Safari bug.
Example
API usage
varreqHeaders={'if-none-match': '"foo"'}varresHeaders={etag: '"bar"'}fresh(reqHeaders,resHeaders)// => falsevarreqHeaders={'if-none-match': '"foo"'}varresHeaders={etag: '"foo"'}fresh(reqHeaders,resHeaders)// => true
Using with Node.js http server
varfresh=require('fresh')varhttp=require('http')varserver=http.createServer(function(req,res){// perform server logic// ... including adding ETag / Last-Modified response headersif(isFresh(req,res)){// client has a fresh copy of resourceres.statusCode=304res.end()return}// send the resourceres.statusCode=200res.end('hello, world!')})functionisFresh(req,res){returnfresh(req.headers,{etag: res.getHeader('ETag'),'last-modified': res.getHeader('Last-Modified')})}server.listen(3000)
License
MIT
About
HTTP request freshness testing
Topics
304etaghttpjavascriptlast-modifiednodejs
Resources
Readme
MIT license
Code of conduct
Code of conduct
Security policy
Security policy
Activity
Custom properties
Stars
162 stars
Watchers
10 watching
Forks
34 forks
Report repository
Releases
Packages
Used by
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
fresh
NPM VersionNPM DownloadsNode.js VersionBuild StatusTest Coverage
HTTP response freshness testing
Installation
This is a Node.js module available through the
npm registry. Installation is done using the
npm install command:
$ npm install fresh

API
varfresh=require('fresh')
fresh(reqHeaders, resHeaders)
Check freshness of the response using request and response headers.
When the response is still "fresh" in the client's cache true is
returned, otherwise false is returned to indicate that the client
cache is now stale and the full response should be sent.
When a client sends the Cache-Control: no-cache request header to
indicate an end-to-end reload request, this module will return false
to make handling these requests transparent.
Known Issues
This module is designed to only follow the HTTP specifications, not
to work-around all kinds of client bugs (especially since this module
typically does not receive enough information to understand what the
client actually is).
There is a known issue that in certain versions of Safari, Safari
will incorrectly make a request that allows this module to validate
freshness of the resource even when Safari does not have a
representation of the resource in the cache. The module
jumanji can be used in
an Express application to work-around this issue and also provides
links to further reading on this Safari bug.
Example
API usage
varreqHeaders={'if-none-match': '"foo"'}varresHeaders={etag: '"bar"'}fresh(reqHeaders,resHeaders)// => falsevarreqHeaders={'if-none-match': '"foo"'}varresHeaders={etag: '"foo"'}fresh(reqHeaders,resHeaders)// => true
Using with Node.js http server
varfresh=require('fresh')varhttp=require('http')varserver=http.createServer(function(req,res){// perform server logic// ... including adding ETag / Last-Modified response headersif(isFresh(req,res)){// client has a fresh copy of resourceres.statusCode=304res.end()return}// send the resourceres.statusCode=200res.end('hello, world!')})functionisFresh(req,res){returnfresh(req.headers,{etag: res.getHeader('ETag'),'last-modified': res.getHeader('Last-Modified')})}server.listen(3000)
License
MIT
About
HTTP request freshness testing
Topics
304etaghttpjavascriptlast-modifiednodejs
Resources
Readme
MIT license
Code of conduct
Code of conduct
Security policy
Security policy
Activity
Custom properties
Stars
162 stars
Watchers
10 watching
Forks
34 forks
Report repository
Releases
Packages
Used by
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
fresh
NPM VersionNPM DownloadsNode.js VersionBuild StatusTest Coverage
HTTP response freshness testing
Installation
This is a Node.js module available through the
npm registry. Installation is done using the
npm install command:
$ npm install fresh

API
varfresh=require('fresh')
fresh(reqHeaders, resHeaders)
Check freshness of the response using request and response headers.
When the response is still "fresh" in the client's cache true is
returned, otherwise false is returned to indicate that the client
cache is now stale and the full response should be sent.
When a client sends the Cache-Control: no-cache request header to
indicate an end-to-end reload request, this module will return false
to make handling these requests transparent.
Known Issues
This module is designed to only follow the HTTP specifications, not
to work-around all kinds of client bugs (especially since this module
typically does not receive enough information to understand what the
client actually is).
There is a known issue that in certain versions of Safari, Safari
will incorrectly make a request that allows this module to validate
freshness of the resource even when Safari does not have a
representation of the resource in the cache. The module
jumanji can be used in
an Express application to work-around this issue and also provides
links to further reading on this Safari bug.
Example
API usage
varreqHeaders={'if-none-match': '"foo"'}varresHeaders={etag: '"bar"'}fresh(reqHeaders,resHeaders)// => falsevarreqHeaders={'if-none-match': '"foo"'}varresHeaders={etag: '"foo"'}fresh(reqHeaders,resHeaders)// => true
Using with Node.js http server
varfresh=require('fresh')varhttp=require('http')varserver=http.createServer(function(req,res){// perform server logic// ... including adding ETag / Last-Modified response headersif(isFresh(req,res)){// client has a fresh copy of resourceres.statusCode=304res.end()return}// send the resourceres.statusCode=200res.end('hello, world!')})functionisFresh(req,res){returnfresh(req.headers,{etag: res.getHeader('ETag'),'last-modified': res.getHeader('Last-Modified')})}server.listen(3000)
License
MIT
About
HTTP request freshness testing
Topics
304etaghttpjavascriptlast-modifiednodejs
Resources
Readme
MIT license
Code of conduct
Code of conduct
Security policy
Security policy
Activity
Custom properties
Stars
162 stars
Watchers
10 watching
Forks
34 forks
Report repository
Releases
Packages
Used by
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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fresh
NPM VersionNPM DownloadsNode.js VersionBuild StatusTest Coverage
HTTP response freshness testing
Installation
This is a Node.js module available through the
npm registry. Installation is done using the
npm install command:
$ npm install fresh

API
varfresh=require('fresh')
fresh(reqHeaders, resHeaders)
Check freshness of the response using request and response headers.
When the response is still "fresh" in the client's cache true is
returned, otherwise false is returned to indicate that the client
cache is now stale and the full response should be sent.
When a client sends the Cache-Control: no-cache request header to
indicate an end-to-end reload request, this module will return false
to make handling these requests transparent.
Known Issues
This module is designed to only follow the HTTP specifications, not
to work-around all kinds of client bugs (especially since this module
typically does not receive enough information to understand what the
client actually is).
There is a known issue that in certain versions of Safari, Safari
will incorrectly make a request that allows this module to validate
freshness of the resource even when Safari does not have a
representation of the resource in the cache. The module
jumanji can be used in
an Express application to work-around this issue and also provides
links to further reading on this Safari bug.
Example
API usage
varreqHeaders={'if-none-match': '"foo"'}varresHeaders={etag: '"bar"'}fresh(reqHeaders,resHeaders)// => falsevarreqHeaders={'if-none-match': '"foo"'}varresHeaders={etag: '"foo"'}fresh(reqHeaders,resHeaders)// => true
Using with Node.js http server
varfresh=require('fresh')varhttp=require('http')varserver=http.createServer(function(req,res){// perform server logic// ... including adding ETag / Last-Modified response headersif(isFresh(req,res)){// client has a fresh copy of resourceres.statusCode=304res.end()return}// send the resourceres.statusCode=200res.end('hello, world!')})functionisFresh(req,res){returnfresh(req.headers,{etag: res.getHeader('ETag'),'last-modified': res.getHeader('Last-Modified')})}server.listen(3000)
License
MIT
About
HTTP request freshness testing
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