Skip to content
BranchesTags

Repository files navigation

NPM versionnpm downloadTestsCoverage Status

Esprima (esprima.org, BSD license) is a high performance, standard-compliant ECMAScript parser written in ECMAScript (also popularly known as JavaScript). Esprima is created and maintained by Ariya Hidayat, with the help of many contributors.

Features

API

Esprima can be used to perform lexical analysis (tokenization) or syntactic analysis (parsing) of a JavaScript program.

A simple example on Node.js REPL:

>varesprima=require('esprima');>varprogram='const answer = 42';>esprima.tokenize(program);[{type: 'Keyword',value: 'const'},{type: 'Identifier',value: 'answer'},{type: 'Punctuator',value: '='},{type: 'Numeric',value: '42'}]>esprima.parseScript(program);{type: 'Program',body:
[{type: 'VariableDeclaration',declarations: [Object],kind: 'const'}],sourceType: 'script'}

For more information, please read the complete documentation.

About

ECMAScript parsing infrastructure for multipurpose analysis

esprima.org

Topics

astecmascriptesprimajavascriptparserparsing

Resources

Readme
BSD-2-Clause license

Code of conduct

Code of conduct

Contributing

Contributing

Security policy

Security policy
Activity
Custom properties

Stars

7.1k stars

Watchers

145 watching

Forks

772 forks
Report repository

Releases

Packages

Used by

Contributors

Languages

, 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all 
 blocks
(function() {
function addCopyButtons() {
document.querySelectorAll('pre code').forEach(function(codeBlock) {
if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;
codeBlock.parentElement.setAttribute('data-copy-added', 'true');
var btn = document.createElement('button');
btn.textContent = 'Copy';
btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';
btn.onmouseover = function() { this.style.opacity = '1'; };
btn.onmouseout = function() { this.style.opacity = '0.7'; };
btn.onclick = function() {
navigator.clipboard.writeText(codeBlock.textContent).then(function() {
btn.textContent = 'Copied!';
setTimeout(function() { btn.textContent = 'Copy'; }, 1500);
});
};
codeBlock.parentElement.style.position = 'relative';
codeBlock.parentElement.appendChild(btn);
});
}
addCopyButtons();
// Re-run on dynamic content
var observer = new MutationObserver(addCopyButtons);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
GitHub - jquery/esprima: ECMAScript parsing infrastructure for multipurpose analysis · GitHub
Skip to content
BranchesTags
Repository files navigation
NPM versionnpm downloadTestsCoverage Status
Esprima (esprima.org, BSD license) is a high performance,
standard-compliant ECMAScript
parser written in ECMAScript (also popularly known as
JavaScript).
Esprima is created and maintained by Ariya Hidayat,
with the help of many contributors.
Features
API
Esprima can be used to perform lexical analysis (tokenization) or syntactic analysis (parsing) of a JavaScript program.
A simple example on Node.js REPL:
>varesprima=require('esprima');>varprogram='const answer = 42';>esprima.tokenize(program);[{type: 'Keyword',value: 'const'},{type: 'Identifier',value: 'answer'},{type: 'Punctuator',value: '='},{type: 'Numeric',value: '42'}]>esprima.parseScript(program);{type: 'Program',body:
[{type: 'VariableDeclaration',declarations: [Object],kind: 'const'}],sourceType: 'script'}
For more information, please read the complete documentation.
About
ECMAScript parsing infrastructure for multipurpose analysis
esprima.org
Topics
astecmascriptesprimajavascriptparserparsing
Resources
Readme
BSD-2-Clause license
Code of conduct
Code of conduct
Contributing
Contributing
Security policy
Security policy
Activity
Custom properties
Stars
7.1k stars
Watchers
145 watching
Forks
772 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Force GitHub README to respect dark mode
(function() {
var style = document.createElement('style');
style.textContent = '
.markdown-body {
color-scheme: dark light;
}
.markdown-body pre { background: #161b22 !important; }
.markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }
.markdown-body table th, .markdown-body table td { border-color: #30363d !important; }
.markdown-body img { background: #0d1117; }
.markdown-body blockquote { border-left-color: #8b949e; }
.markdown-body hr { border-color: #30363d; }
';
document.head.appendChild(style);
})();
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - jquery/esprima: ECMAScript parsing infrastructure for multipurpose analysis · GitHub
Skip to content
BranchesTags
Repository files navigation
NPM versionnpm downloadTestsCoverage Status
Esprima (esprima.org, BSD license) is a high performance,
standard-compliant ECMAScript
parser written in ECMAScript (also popularly known as
JavaScript).
Esprima is created and maintained by Ariya Hidayat,
with the help of many contributors.
Features
API
Esprima can be used to perform lexical analysis (tokenization) or syntactic analysis (parsing) of a JavaScript program.
A simple example on Node.js REPL:
>varesprima=require('esprima');>varprogram='const answer = 42';>esprima.tokenize(program);[{type: 'Keyword',value: 'const'},{type: 'Identifier',value: 'answer'},{type: 'Punctuator',value: '='},{type: 'Numeric',value: '42'}]>esprima.parseScript(program);{type: 'Program',body:
[{type: 'VariableDeclaration',declarations: [Object],kind: 'const'}],sourceType: 'script'}
For more information, please read the complete documentation.
About
ECMAScript parsing infrastructure for multipurpose analysis
esprima.org
Topics
astecmascriptesprimajavascriptparserparsing
Resources
Readme
BSD-2-Clause license
Code of conduct
Code of conduct
Contributing
Contributing
Security policy
Security policy
Activity
Custom properties
Stars
7.1k stars
Watchers
145 watching
Forks
772 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
(function() {
var ref = document.referrer;
var terms = [];
if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {
var url = new URL(ref);
var q = url.searchParams.get('q') || url.searchParams.get('p');
if (q) {
terms = q.split(/\s+/).filter(function(t) { return t.length > 2; });
}
}
if (terms.length === 0) return;
var style = document.createElement('style');
style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';
document.head.appendChild(style);
function highlight(node) {
if (node.nodeType === 3) { // text node
var text = node.textContent;
var found = false;
terms.forEach(function(term) {
var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi');
if (regex.test(text)) {
found = true;
var frag = document.createDocumentFragment();
var parts = text.split(regex);
parts.forEach(function(part, i) {
if (i % 2 === 0) {
frag.appendChild(document.createTextNode(part));
} else {
var span = document.createElement('span');
span.className = 'userscript-highlight';
span.textContent = part;
frag.appendChild(span);
}
});
node.parentNode.replaceChild(frag, node);
}
});
} else if (node.nodeType === 1 && node.childNodes) { // element
var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];
if (!skipTags.includes(node.tagName)) {
Array.from(node.childNodes).forEach(highlight);
}
}
}
highlight(document.body);
// Re-highlight on dynamic content
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1 || node.nodeType === 3) highlight(node);
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - jquery/esprima: ECMAScript parsing infrastructure for multipurpose analysis · GitHub
Skip to content
BranchesTags
Repository files navigation
NPM versionnpm downloadTestsCoverage Status
Esprima (esprima.org, BSD license) is a high performance,
standard-compliant ECMAScript
parser written in ECMAScript (also popularly known as
JavaScript).
Esprima is created and maintained by Ariya Hidayat,
with the help of many contributors.
Features
API
Esprima can be used to perform lexical analysis (tokenization) or syntactic analysis (parsing) of a JavaScript program.
A simple example on Node.js REPL:
>varesprima=require('esprima');>varprogram='const answer = 42';>esprima.tokenize(program);[{type: 'Keyword',value: 'const'},{type: 'Identifier',value: 'answer'},{type: 'Punctuator',value: '='},{type: 'Numeric',value: '42'}]>esprima.parseScript(program);{type: 'Program',body:
[{type: 'VariableDeclaration',declarations: [Object],kind: 'const'}],sourceType: 'script'}
For more information, please read the complete documentation.
About
ECMAScript parsing infrastructure for multipurpose analysis
esprima.org
Topics
astecmascriptesprimajavascriptparserparsing
Resources
Readme
BSD-2-Clause license
Code of conduct
Code of conduct
Contributing
Contributing
Security policy
Security policy
Activity
Custom properties
Stars
7.1k stars
Watchers
145 watching
Forks
772 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
cleanLinks();
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1) {
if (node.tagName === 'A') cleanLinks();
node.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
GitHub - jquery/esprima: ECMAScript parsing infrastructure for multipurpose analysis · GitHub
Skip to content
BranchesTags
Repository files navigation
NPM versionnpm downloadTestsCoverage Status
Esprima (esprima.org, BSD license) is a high performance,
standard-compliant ECMAScript
parser written in ECMAScript (also popularly known as
JavaScript).
Esprima is created and maintained by Ariya Hidayat,
with the help of many contributors.
Features
API
Esprima can be used to perform lexical analysis (tokenization) or syntactic analysis (parsing) of a JavaScript program.
A simple example on Node.js REPL:
>varesprima=require('esprima');>varprogram='const answer = 42';>esprima.tokenize(program);[{type: 'Keyword',value: 'const'},{type: 'Identifier',value: 'answer'},{type: 'Punctuator',value: '='},{type: 'Numeric',value: '42'}]>esprima.parseScript(program);{type: 'Program',body:
[{type: 'VariableDeclaration',declarations: [Object],kind: 'const'}],sourceType: 'script'}
For more information, please read the complete documentation.
About
ECMAScript parsing infrastructure for multipurpose analysis
esprima.org
Topics
astecmascriptesprimajavascriptparserparsing
Resources
Readme
BSD-2-Clause license
Code of conduct
Code of conduct
Contributing
Contributing
Security policy
Security policy
Activity
Custom properties
Stars
7.1k stars
Watchers
145 watching
Forks
772 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
}
// Try immediately
tryTheater();
// Try after navigation (SPA)
var lastUrl = location.href;
setInterval(function() {
if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - jquery/esprima: ECMAScript parsing infrastructure for multipurpose analysis · GitHub
Skip to content
BranchesTags
Repository files navigation
NPM versionnpm downloadTestsCoverage Status
Esprima (esprima.org, BSD license) is a high performance,
standard-compliant ECMAScript
parser written in ECMAScript (also popularly known as
JavaScript).
Esprima is created and maintained by Ariya Hidayat,
with the help of many contributors.
Features
API
Esprima can be used to perform lexical analysis (tokenization) or syntactic analysis (parsing) of a JavaScript program.
A simple example on Node.js REPL:
>varesprima=require('esprima');>varprogram='const answer = 42';>esprima.tokenize(program);[{type: 'Keyword',value: 'const'},{type: 'Identifier',value: 'answer'},{type: 'Punctuator',value: '='},{type: 'Numeric',value: '42'}]>esprima.parseScript(program);{type: 'Program',body:
[{type: 'VariableDeclaration',declarations: [Object],kind: 'const'}],sourceType: 'script'}
For more information, please read the complete documentation.
About
ECMAScript parsing infrastructure for multipurpose analysis
esprima.org
Topics
astecmascriptesprimajavascriptparserparsing
Resources
Readme
BSD-2-Clause license
Code of conduct
Code of conduct
Contributing
Contributing
Security policy
Security policy
Activity
Custom properties
Stars
7.1k stars
Watchers
145 watching
Forks
772 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
el.style.top = 'auto';
el.style.zIndex = 'auto';
}
});
}
unstick();
var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - jquery/esprima: ECMAScript parsing infrastructure for multipurpose analysis · GitHub
Skip to content
BranchesTags
Repository files navigation
NPM versionnpm downloadTestsCoverage Status
Esprima (esprima.org, BSD license) is a high performance,
standard-compliant ECMAScript
parser written in ECMAScript (also popularly known as
JavaScript).
Esprima is created and maintained by Ariya Hidayat,
with the help of many contributors.
Features
API
Esprima can be used to perform lexical analysis (tokenization) or syntactic analysis (parsing) of a JavaScript program.
A simple example on Node.js REPL:
>varesprima=require('esprima');>varprogram='const answer = 42';>esprima.tokenize(program);[{type: 'Keyword',value: 'const'},{type: 'Identifier',value: 'answer'},{type: 'Punctuator',value: '='},{type: 'Numeric',value: '42'}]>esprima.parseScript(program);{type: 'Program',body:
[{type: 'VariableDeclaration',declarations: [Object],kind: 'const'}],sourceType: 'script'}
For more information, please read the complete documentation.
About
ECMAScript parsing infrastructure for multipurpose analysis
esprima.org
Topics
astecmascriptesprimajavascriptparserparsing
Resources
Readme
BSD-2-Clause license
Code of conduct
Code of conduct
Contributing
Contributing
Security policy
Security policy
Activity
Custom properties
Stars
7.1k stars
Watchers
145 watching
Forks
772 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
.ace_editor, .ace_editor *,
.CodeMirror, .CodeMirror *,
.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
.highlight, .highlight *,
pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
function removeDarkMode() {
var style = document.getElementById('universal-dark-mode-style');
if (style) style.remove();
}
// Toggle with Alt+Shift+D
document.addEventListener('keydown', function(e) {
if (e.altKey && e.shiftKey && e.key === 'D') {
e.preventDefault();
enabled = !enabled;
if (enabled) {
applyDarkMode();
console.log('[Universal Dark Mode] Enabled');
} else {
removeDarkMode();
console.log('[Universal Dark Mode] Disabled');
}
}
});
// Apply on load
applyDarkMode();
// Re-apply on dynamic content
var observer = new MutationObserver(function(mutations) {
if (enabled && !document.getElementById('universal-dark-mode-style')) {
applyDarkMode();
}
});
observer.observe(document.head, { childList: true });
console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
})();
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();
GitHub - jquery/esprima: ECMAScript parsing infrastructure for multipurpose analysis · GitHub
Skip to content
BranchesTags
Repository files navigation
NPM versionnpm downloadTestsCoverage Status
Esprima (esprima.org, BSD license) is a high performance,
standard-compliant ECMAScript
parser written in ECMAScript (also popularly known as
JavaScript).
Esprima is created and maintained by Ariya Hidayat,
with the help of many contributors.
Features
API
Esprima can be used to perform lexical analysis (tokenization) or syntactic analysis (parsing) of a JavaScript program.
A simple example on Node.js REPL:
>varesprima=require('esprima');>varprogram='const answer = 42';>esprima.tokenize(program);[{type: 'Keyword',value: 'const'},{type: 'Identifier',value: 'answer'},{type: 'Punctuator',value: '='},{type: 'Numeric',value: '42'}]>esprima.parseScript(program);{type: 'Program',body:
[{type: 'VariableDeclaration',declarations: [Object],kind: 'const'}],sourceType: 'script'}
For more information, please read the complete documentation.
About
ECMAScript parsing infrastructure for multipurpose analysis
esprima.org
Topics
astecmascriptesprimajavascriptparserparsing
Resources
Readme
BSD-2-Clause license
Code of conduct
Code of conduct
Contributing
Contributing
Security policy
Security policy
Activity
Custom properties
Stars
7.1k stars
Watchers
145 watching
Forks
772 forks
Report repository
Releases
Packages
Used by
Contributors
Languages