René's URL Explorer Experiment


Title: Meta programming - JavaScript | MDN

Open Graph Title: Meta programming - JavaScript | MDN

Description: The Proxy and Reflect objects allow you to intercept and define custom behavior for fundamental language operations (e.g., property lookup, assignment, enumeration, function invocation, etc.). With the help of these two objects you are able to program at the meta level of JavaScript.

Open Graph Description: The Proxy and Reflect objects allow you to intercept and define custom behavior for fundamental language operations (e.g., property lookup, assignment, enumeration, function invocation, etc.). With the help of these two objects you are able to program at the meta level of JavaScript.

Opengraph URL: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Meta_programming

direct link

Domain: developer.mozilla.org

og:localeen_US
og:imagehttps://developer.mozilla.org/mdn-social-share.d893525a4fb5fb1f67a2.png
og:image:typeimage/png
og:image:height1080
og:image:width1920
og:image:altThe MDN Web Docs logo, featuring a blue accent color, displayed on a solid black background.
og:site_nameMDN Web Docs
twitter:cardsummary_large_image
twitter:creatorMozDevNet
position4

Links:

Skip to main contenthttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Meta_programming#content
Skip to searchhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Meta_programming#search
MDN https://developer.mozilla.org/en-US/
HTML: Markup languagehttps://developer.mozilla.org/en-US/docs/Web/HTML
Elementshttps://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements
Global attributeshttps://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes
Attributeshttps://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes
See all…https://developer.mozilla.org/en-US/docs/Web/HTML/Reference
Responsive imageshttps://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images
HTML cheatsheethttps://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet
Date & time formatshttps://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats
See all…https://developer.mozilla.org/en-US/docs/Web/HTML/Guides
SVGhttps://developer.mozilla.org/en-US/docs/Web/SVG
MathMLhttps://developer.mozilla.org/en-US/docs/Web/MathML
XMLhttps://developer.mozilla.org/en-US/docs/Web/XML
CSS: Styling languagehttps://developer.mozilla.org/en-US/docs/Web/CSS
Propertieshttps://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties
Selectorshttps://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors
At-ruleshttps://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules
Valueshttps://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values
See all…https://developer.mozilla.org/en-US/docs/Web/CSS/Reference
Box modelhttps://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction
Animationshttps://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using
Flexboxhttps://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts
Colorshttps://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color
See all…https://developer.mozilla.org/en-US/docs/Web/CSS/Guides
Column layoutshttps://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts
Centering an elementhttps://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element
Card componenthttps://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card
See all…https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook
JavaScript: Scripting languagehttps://developer.mozilla.org/en-US/docs/Web/JavaScript
Standard built-in objectshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects
Expressions & operatorshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators
Statements & declarationshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements
Functionshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions
See all…https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference
Control flow & error handinghttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling
Loops and iterationhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration
Working with objectshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects
Using classeshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes
See all…https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide
Web APIs: Programming interfaceshttps://developer.mozilla.org/en-US/docs/Web/API
File system APIhttps://developer.mozilla.org/en-US/docs/Web/API/File_System_API
Fetch APIhttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API
Geolocation APIhttps://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API
HTML DOM APIhttps://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API
Push APIhttps://developer.mozilla.org/en-US/docs/Web/API/Push_API
Service worker APIhttps://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API
See all…https://developer.mozilla.org/en-US/docs/Web/API
Using the Web animation APIhttps://developer.mozilla.org/en-US/docs/Web/API/Web_Animations_API/Using_the_Web_Animations_API
Using the Fetch APIhttps://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch
Working with the History APIhttps://developer.mozilla.org/en-US/docs/Web/API/History_API/Working_with_the_History_API
Using the Web speech APIhttps://developer.mozilla.org/en-US/docs/Web/API/Web_Speech_API/Using_the_Web_Speech_API
Using web workershttps://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Using_web_workers
All web technologyhttps://developer.mozilla.org/en-US/docs/Web
Accessibilityhttps://developer.mozilla.org/en-US/docs/Web/Accessibility
HTTPhttps://developer.mozilla.org/en-US/docs/Web/HTTP
URIhttps://developer.mozilla.org/en-US/docs/Web/URI
Web extensionshttps://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions
WebAssemblyhttps://developer.mozilla.org/en-US/docs/WebAssembly
WebDriverhttps://developer.mozilla.org/en-US/docs/Web/WebDriver
See all…https://developer.mozilla.org/en-US/docs/Web
Mediahttps://developer.mozilla.org/en-US/docs/Web/Media
Performancehttps://developer.mozilla.org/en-US/docs/Web/Performance
Privacyhttps://developer.mozilla.org/en-US/docs/Web/Privacy
Securityhttps://developer.mozilla.org/en-US/docs/Web/Security
Progressive web appshttps://developer.mozilla.org/en-US/docs/Web/Progressive_web_apps
Learn web developmenthttps://developer.mozilla.org/en-US/docs/Learn_web_development
Getting started moduleshttps://developer.mozilla.org/en-US/docs/Learn_web_development/Getting_started
Core moduleshttps://developer.mozilla.org/en-US/docs/Learn_web_development/Core
MDN Curriculumhttps://developer.mozilla.org/en-US/curriculum/
Structuring content with HTML modulehttps://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content
CSS styling basics modulehttps://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics
CSS layout modulehttps://developer.mozilla.org/en-US/docs/Learn_web_development/Core/CSS_layout
Dynamic scripting with JavaScript modulehttps://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting
Playgroundhttps://developer.mozilla.org/en-US/play
HTTP Observatoryhttps://developer.mozilla.org/en-US/observatory
Border-image generatorhttps://developer.mozilla.org/en-US/docs/Web/CSS/CSS_backgrounds_and_borders/Border-image_generator
Border-radius generatorhttps://developer.mozilla.org/en-US/docs/Web/CSS/CSS_backgrounds_and_borders/Border-radius_generator
Box-shadow generatorhttps://developer.mozilla.org/en-US/docs/Web/CSS/CSS_backgrounds_and_borders/Box-shadow_generator
Color format converterhttps://developer.mozilla.org/en-US/docs/Web/CSS/CSS_colors/Color_format_converter
Color mixerhttps://developer.mozilla.org/en-US/docs/Web/CSS/CSS_colors/Color_mixer
Shape generatorhttps://developer.mozilla.org/en-US/docs/Web/CSS/CSS_shapes/Shape_generator
About MDNhttps://developer.mozilla.org/en-US/about
Advertise with ushttps://developer.mozilla.org/en-US/advertising
Communityhttps://developer.mozilla.org/en-US/community
MDN on GitHubhttps://github.com/mdn
Bloghttps://developer.mozilla.org/en-US/blog/
Webhttps://developer.mozilla.org/en-US/docs/Web
JavaScripthttps://developer.mozilla.org/en-US/docs/Web/JavaScript
Guidehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide
Meta programminghttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Meta_programming
https://github.com/orgs/mdn/discussions/739
https://developer.mozilla.org/de/docs/Web/JavaScript/Guide/Meta_programming
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Meta_programming
https://developer.mozilla.org/es/docs/Web/JavaScript/Guide/Meta_programming
https://developer.mozilla.org/fr/docs/Web/JavaScript/Guide/Meta_programming
https://developer.mozilla.org/ja/docs/Web/JavaScript/Guide/Meta_programming
https://developer.mozilla.org/ko/docs/Web/JavaScript/Guide/Meta_programming
https://developer.mozilla.org/pt-BR/docs/Web/JavaScript/Guide/Meta_programming
https://developer.mozilla.org/ru/docs/Web/JavaScript/Guide/Meta_programming
https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Guide/Meta_programming
Proxyhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy
Reflecthttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect
Proxieshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Meta_programming#proxies
Handlers and trapshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Meta_programming#handlers_and_traps
Revocable Proxyhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Meta_programming#revocable_proxy
Reflectionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Meta_programming#reflection
Proxieshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Meta_programming#proxies
Proxyhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy
Proxyhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy
Terminologyhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Meta_programming#terminology
handlerhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy/Proxy
trapshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Meta_programming#traps
targethttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Meta_programming#target
invariantshttps://developer.mozilla.org/en-US/docs/Glossary/Invariant
TypeErrorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypeError
Handlers and trapshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Meta_programming#handlers_and_traps
reference pageshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy/Proxy
handler.getPrototypeOf()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy/Proxy/getPrototypeOf
Object.getPrototypeOf()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/getPrototypeOf
Reflect.getPrototypeOf()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect/getPrototypeOf
__proto__https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/proto
Object.prototype.isPrototypeOf()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/isPrototypeOf
instanceofhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/instanceof
handler.setPrototypeOf()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy/Proxy/setPrototypeOf
Object.setPrototypeOf()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/setPrototypeOf
Reflect.setPrototypeOf()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect/setPrototypeOf
handler.isExtensible()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy/Proxy/isExtensible
Object.isExtensible()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/isExtensible
Reflect.isExtensible()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect/isExtensible
handler.preventExtensions()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy/Proxy/preventExtensions
Object.preventExtensions()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/preventExtensions
Reflect.preventExtensions()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect/preventExtensions
handler.getOwnPropertyDescriptor()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy/Proxy/getOwnPropertyDescriptor
Object.getOwnPropertyDescriptor()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/getOwnPropertyDescriptor
Reflect.getOwnPropertyDescriptor()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect/getOwnPropertyDescriptor
handler.defineProperty()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy/Proxy/defineProperty
Object.defineProperty()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty
Reflect.defineProperty()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect/defineProperty
handler.has()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy/Proxy/has
Property queryhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Meta_programming#property_query
Inherited property queryhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Meta_programming#inherited_property_query
Reflect.has()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect/has
handler.get()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy/Proxy/get
Property accesshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Meta_programming#property_access
Inherited property accesshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Meta_programming#inherited_property_access
Reflect.get()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect/get
handler.set()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy/Proxy/set
Property assignmenthttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Meta_programming#property_assignment
Inherited property assignmenthttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Meta_programming#inherited_property_assignment
Reflect.set()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect/set
handler.deleteProperty()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy/Proxy/deleteProperty
Property deletionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Meta_programming#property_deletion
Reflect.deleteProperty()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect/deleteProperty
handler.ownKeys()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy/Proxy/ownKeys
Object.getOwnPropertyNames()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/getOwnPropertyNames
Object.getOwnPropertySymbols()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/getOwnPropertySymbols
Object.keys()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/keys
Reflect.ownKeys()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect/ownKeys
handler.apply()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy/Proxy/apply
Function.prototype.apply()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/apply
Function.prototype.call()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/call
Reflect.apply()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect/apply
handler.construct()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy/Proxy/construct
Reflect.construct()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect/construct
Revocable Proxyhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Meta_programming#revocable_proxy
Proxy.revocable()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy/revocable
TypeErrorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypeError
Reflectionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Meta_programming#reflection
Reflecthttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect
proxy handler'shttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy/Proxy
Reflect.has()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect/has
in operatorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/in
A better apply() functionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Meta_programming#a_better_apply_function
Function.prototype.apply()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/apply
array-like objecthttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Indexed_collections#working_with_array-like_objects
Reflect.applyhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect/apply
Checking if property definition has been successfulhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Meta_programming#checking_if_property_definition_has_been_successful
Object.definePropertyhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty
TypeErrorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypeError
try...catchhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/try...catch
Reflect.defineProperty()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect/defineProperty
if...elsehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/if...else
Learn how to contributehttps://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started
MDN contributorshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Meta_programming/contributors.txt
View this page on GitHubhttps://github.com/mdn/content/blob/main/files/en-us/web/javascript/guide/meta_programming/index.md?plain=1
Report a problem with this contenthttps://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FWeb%2FJavaScript%2FGuide%2FMeta_programming&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fweb%2Fjavascript%2Fguide%2Fmeta_programming%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FWeb%2FJavaScript%2FGuide%2FMeta_programming%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fweb%2Fjavascript%2Fguide%2Fmeta_programming%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2Ffad67be4431d8e6c2a89ac880735233aa76c41d4%0A*+Document+last+modified%3A+2025-07-08T13%3A18%3A45.000Z%0A%0A%3C%2Fdetails%3E
JavaScripthttps://developer.mozilla.org/en-US/docs/Web/JavaScript
JavaScript Guidehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide
Introductionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Introduction
Grammar and typeshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Grammar_and_types
Control flow and error handlinghttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling
Loops and iterationhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration
Functionshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Functions
Expressions and operatorshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Expressions_and_operators
Numbers and stringshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Numbers_and_strings
Representing dates & timeshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Representing_dates_times
Regular expressionshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_expressions
Indexed collectionshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Indexed_collections
Keyed collectionshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Keyed_collections
Working with objectshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects
Using classeshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes
Using promiseshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_promises
JavaScript typed arrayshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Typed_arrays
Iterators and generatorshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Iterators_and_generators
Resource managementhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Resource_management
Internationalizationhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Internationalization
JavaScript moduleshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules
Language overviewhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Language_overview
JavaScript data structureshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Data_structures
Equality comparisons and samenesshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Equality_comparisons_and_sameness
Enumerability and ownership of propertieshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Enumerability_and_ownership_of_properties
Closureshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Closures
Inheritance and the prototype chainhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Inheritance_and_the_prototype_chain
Meta programminghttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Meta_programming
Memory Managementhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Memory_management
Referenceshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference
Built-in objectshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects
AggregateErrorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/AggregateError
Arrayhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array
ArrayBufferhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer
AsyncDisposableStackhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/AsyncDisposableStack
AsyncFunctionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/AsyncFunction
AsyncGeneratorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/AsyncGenerator
AsyncGeneratorFunctionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/AsyncGeneratorFunction
AsyncIteratorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/AsyncIterator
Atomicshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Atomics
BigInthttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/BigInt
BigInt64Arrayhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/BigInt64Array
BigUint64Arrayhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/BigUint64Array
Booleanhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean
DataViewhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView
Datehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date
decodeURI()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/decodeURI
decodeURIComponent()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/decodeURIComponent
DisposableStackhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DisposableStack
encodeURI()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/encodeURI
encodeURIComponent()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/encodeURIComponent
Errorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error
escape()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/escape
eval()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/eval
EvalErrorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/EvalError
FinalizationRegistryhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/FinalizationRegistry
Float16Arrayhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Float16Array
Float32Arrayhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Float32Array
Float64Arrayhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Float64Array
Functionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function
Generatorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Generator
GeneratorFunctionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/GeneratorFunction
globalThishttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/globalThis
Infinityhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Infinity
Int8Arrayhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Int8Array
Int16Arrayhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Int16Array
Int32Arrayhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Int32Array
InternalErrorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/InternalError
Intlhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl
isFinite()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/isFinite
isNaN()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/isNaN
Iteratorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Iterator
JSONhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON
Maphttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map
Mathhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math
NaNhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/NaN
Numberhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number
Objecthttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object
parseFloat()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/parseFloat
parseInt()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/parseInt
Promisehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise
Proxyhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy
RangeErrorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RangeError
ReferenceErrorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ReferenceError
Reflecthttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect
RegExphttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp
Sethttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set
SharedArrayBufferhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer
Stringhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String
SuppressedErrorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SuppressedError
Symbolhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol
SyntaxErrorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SyntaxError
Temporalhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal
TypedArrayhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray
TypeErrorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypeError
Uint8Arrayhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array
Uint8ClampedArrayhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8ClampedArray
Uint16Arrayhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint16Array
Uint32Arrayhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint32Array
undefinedhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/undefined
unescape()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/unescape
URIErrorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/URIError
WeakMaphttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakMap
WeakRefhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakRef
WeakSethttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakSet
Expressions & operatorshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators
Addition (+)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Addition
Addition assignment (+=)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Addition_assignment
Assignment (=)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Assignment
async function expressionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/async_function
async function* expressionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/async_function*
awaithttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/await
Bitwise AND (&)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Bitwise_AND
Bitwise AND assignment (&=)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Bitwise_AND_assignment
Bitwise NOT (~)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Bitwise_NOT
Bitwise OR (|)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Bitwise_OR
Bitwise OR assignment (|=)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Bitwise_OR_assignment
Bitwise XOR (^)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Bitwise_XOR
Bitwise XOR assignment (^=)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Bitwise_XOR_assignment
class expressionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/class
Comma operator (,)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Comma_operator
Conditional (ternary) operatorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Conditional_operator
Decrement (--)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Decrement
deletehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/delete
Destructuringhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Destructuring
Division (/)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Division
Division assignment (/=)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Division_assignment
Equality (==)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Equality
Exponentiation (**)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Exponentiation
Exponentiation assignment (**=)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Exponentiation_assignment
function expressionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/function
function* expressionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/function*
Greater than (>)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Greater_than
Greater than or equal (>=)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Greater_than_or_equal
Grouping operator ( )https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Grouping
import.metahttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/import.meta
import.meta.resolve()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/import.meta/resolve
import()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/import
inhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/in
Increment (++)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Increment
Inequality (!=)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Inequality
instanceofhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/instanceof
Left shift (<<)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Left_shift
Left shift assignment (<<=)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Left_shift_assignment
Less than (<)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Less_than
Less than or equal (<=)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Less_than_or_equal
Logical AND (&&)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Logical_AND
Logical AND assignment (&&=)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Logical_AND_assignment
Logical NOT (!)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Logical_NOT
Logical OR (||)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Logical_OR
Logical OR assignment (||=)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Logical_OR_assignment
Multiplication (*)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Multiplication
Multiplication assignment (*=)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Multiplication_assignment
newhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/new
new.targethttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/new.target
nullhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/null
Nullish coalescing assignment (??=)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Nullish_coalescing_assignment
Nullish coalescing operator (??)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Nullish_coalescing
Object initializerhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Object_initializer
Operator precedencehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_precedence
Optional chaining (?.)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Optional_chaining
Property accessorshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Property_accessors
Remainder (%)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Remainder
Remainder assignment (%=)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Remainder_assignment
Right shift (>>)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Right_shift
Right shift assignment (>>=)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Right_shift_assignment
Spread syntax (...)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Spread_syntax
Strict equality (===)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Strict_equality
Strict inequality (!==)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Strict_inequality
Subtraction (-)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Subtraction
Subtraction assignment (-=)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Subtraction_assignment
superhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/super
thishttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/this
typeofhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/typeof
Unary negation (-)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Unary_negation
Unary plus (+)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Unary_plus
Unsigned right shift (>>>)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Unsigned_right_shift
Unsigned right shift assignment (>>>=)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Unsigned_right_shift_assignment
void operatorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/void
yieldhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/yield
yield*https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/yield*
Statements & declarationshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements
async functionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/async_function
async function*https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/async_function*
await usinghttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/await_using
Block statementhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/block
breakhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/break
classhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/class
consthttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/const
continuehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/continue
debuggerhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/debugger
do...whilehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/do...while
Empty statementhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/Empty
exporthttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/export
Expression statementhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/Expression_statement
forhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for
for await...ofhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for-await...of
for...inhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for...in
for...ofhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for...of
functionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/function
function*https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/function*
if...elsehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/if...else
importhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/import
Import attributeshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/import/with
Labeled statementhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/label
lethttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/let
returnhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/return
switchhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/switch
throwhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/throw
try...catchhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/try...catch
usinghttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/using
varhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/var
whilehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/while
withhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/with
Functionshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions
Arrow function expressionshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions
Default parametershttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Default_parameters
gethttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/get
Method definitionshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Method_definitions
Rest parametershttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/rest_parameters
sethttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/set
The arguments objecthttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/arguments
[Symbol.iterator]()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/arguments/Symbol.iterator
calleehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/arguments/callee
lengthhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/arguments/length
Classeshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes
constructorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes/constructor
extendshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes/extends
Private elementshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes/Private_elements
Public class fieldshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes/Public_class_fields
statichttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes/static
Static initialization blockshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes/Static_initialization_blocks
Regular expressionshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Regular_expressions
Backreference: \1, \2https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Regular_expressions/Backreference
Capturing group: (...)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Regular_expressions/Capturing_group
Character class escape: \d, \D, \w, \W, \s, \Shttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Regular_expressions/Character_class_escape
Character class: [...], [^...]https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Regular_expressions/Character_class
Character escape: \n, \u{...}https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Regular_expressions/Character_escape
Disjunction: |https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Regular_expressions/Disjunction
Input boundary assertion: ^, $https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Regular_expressions/Input_boundary_assertion
Literal character: a, bhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Regular_expressions/Literal_character
Lookahead assertion: (?=...), (?!...)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Regular_expressions/Lookahead_assertion
Lookbehind assertion: (?<=...), (?https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Regular_expressions/Lookbehind_assertion
Modifier: (?ims-ims:...)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Regular_expressions/Modifier
Named backreference: \khttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Regular_expressions/Named_backreference
Named capturing group: (?...)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Regular_expressions/Named_capturing_group
Non-capturing group: (?:...)https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Regular_expressions/Non-capturing_group
Quantifier: *, +, ?, {n}, {n,}, {n,m}https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Regular_expressions/Quantifier
Unicode character class escape: \p{...}, \P{...}https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Regular_expressions/Unicode_character_class_escape
Wildcard: .https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Regular_expressions/Wildcard
Word boundary assertion: \b, \Bhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Regular_expressions/Word_boundary_assertion
Errorshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors
AggregateError: No Promise in Promise.any was resolvedhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Promise_any_all_rejected
Error: Permission denied to access property "x"https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Property_access_denied
InternalError: too much recursionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Too_much_recursion
RangeError: argument is not a valid code pointhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Not_a_valid_code_point
RangeError: BigInt division by zerohttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/BigInt_division_by_zero
RangeError: BigInt negative exponenthttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/BigInt_negative_exponent
RangeError: form must be one of 'NFC', 'NFD', 'NFKC', or 'NFKD'https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Form_must_be_one_of
RangeError: invalid array lengthhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Invalid_array_length
RangeError: invalid datehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Invalid_date
RangeError: precision is out of rangehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Precision_range
RangeError: radix must be an integerhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Bad_radix
RangeError: repeat count must be less than infinityhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Resulting_string_too_large
RangeError: repeat count must be non-negativehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Negative_repetition_count
RangeError: x can't be converted to BigInt because it isn't an integerhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Cant_be_converted_to_BigInt_because_it_isnt_an_integer
ReferenceError: "x" is not definedhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Not_defined
ReferenceError: assignment to undeclared variable "x"https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Undeclared_var
ReferenceError: can't access lexical declaration 'X' before initializationhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Cant_access_lexical_declaration_before_init
ReferenceError: must call super constructor before using 'this' in derived class constructorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Super_not_called
ReferenceError: super() called twice in derived class constructorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Super_called_twice
SyntaxError: 'arguments'/'eval' can't be defined or assigned to in strict mode codehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Bad_strict_arguments_eval
SyntaxError: "0"-prefixed octal literals are deprecatedhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Deprecated_octal_literal
SyntaxError: "use strict" not allowed in function with non-simple parametershttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Strict_non_simple_params
SyntaxError: "x" is a reserved identifierhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Reserved_identifier
SyntaxError: \ at end of patternhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Regex_backslash_at_end_of_pattern
SyntaxError: a declaration in the head of a for-of loop can't have an initializerhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Invalid_for-of_initializer
SyntaxError: applying the 'delete' operator to an unqualified name is deprecatedhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Delete_in_strict_mode
SyntaxError: arguments is not valid in fieldshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Arguments_not_allowed
SyntaxError: await is only valid in async functions, async generators and moduleshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Bad_await
SyntaxError: await/yield expression can't be used in parameterhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/await_yield_in_parameter
SyntaxError: cannot use `??` unparenthesized within `||` and `&&` expressionshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Cant_use_nullish_coalescing_unparenthesized
SyntaxError: character class escape cannot be used in class range in regular expressionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Regex_character_class_escape_in_class_range
SyntaxError: continue must be inside loophttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Bad_continue
SyntaxError: duplicate capture group name in regular expressionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Regex_duplicate_capture_group_name
SyntaxError: duplicate formal argument xhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Duplicate_parameter
SyntaxError: for-in loop head declarations may not have initializershttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Invalid_for-in_initializer
SyntaxError: function statement requires a namehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Unnamed_function_statement
SyntaxError: functions cannot be labelledhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Function_label
SyntaxError: getter and setter for private name #x should either be both static or non-statichttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Either_be_both_static_or_non-static
SyntaxError: getter functions must have no argumentshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Getter_no_arguments
SyntaxError: identifier starts immediately after numeric literalhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Identifier_after_number
SyntaxError: illegal characterhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Illegal_character
SyntaxError: import declarations may only appear at top level of a modulehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/import_decl_module_top_level
SyntaxError: incomplete quantifier in regular expressionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Regex_incomplete_quantifier
SyntaxError: invalid assignment left-hand sidehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Invalid_assignment_left-hand_side
SyntaxError: invalid BigInt syntaxhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Invalid_BigInt_syntax
SyntaxError: invalid capture group name in regular expressionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Regex_invalid_capture_group_name
SyntaxError: invalid character in class in regular expressionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Regex_invalid_char_in_class
SyntaxError: invalid class set operation in regular expressionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Regex_invalid_class_set_operation
SyntaxError: invalid decimal escape in regular expressionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Regex_invalid_decimal_escape
SyntaxError: invalid identity escape in regular expressionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Regex_invalid_identity_escape
SyntaxError: invalid named capture reference in regular expressionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Regex_invalid_named_capture_reference
SyntaxError: invalid property name in regular expressionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Regex_invalid_property_name
SyntaxError: invalid range in character classhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Regex_invalid_range_in_character_class
SyntaxError: invalid regexp grouphttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Regex_invalid_group
SyntaxError: invalid regular expression flag "x"https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Bad_regexp_flag
SyntaxError: invalid unicode escape in regular expressionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Regex_invalid_unicode_escape
SyntaxError: JSON.parse: bad parsinghttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/JSON_bad_parse
SyntaxError: label not foundhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Label_not_found
SyntaxError: missing : after property idhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Missing_colon_after_property_id
SyntaxError: missing ) after argument listhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Missing_parenthesis_after_argument_list
SyntaxError: missing ) after conditionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Missing_parenthesis_after_condition
SyntaxError: missing ] after element listhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Missing_bracket_after_list
SyntaxError: missing } after function bodyhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Missing_curly_after_function_body
SyntaxError: missing } after property listhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Missing_curly_after_property_list
SyntaxError: missing = in const declarationhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Missing_initializer_in_const
SyntaxError: missing formal parameterhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Missing_formal_parameter
SyntaxError: missing name after . operatorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Missing_name_after_dot_operator
SyntaxError: missing variable namehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/No_variable_name
SyntaxError: negated character class with strings in regular expressionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Regex_negated_char_class_with_strings
SyntaxError: new keyword cannot be used with an optional chainhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Bad_new_optional
SyntaxError: nothing to repeathttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Regex_nothing_to_repeat
SyntaxError: numbers out of order in {} quantifier.https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Regex_numbers_out_of_order_in_quantifier
SyntaxError: octal escape sequences can't be used in untagged template literals or in strict mode codehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Deprecated_octal_escape_sequence
SyntaxError: parameter after rest parameterhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Parameter_after_rest_parameter
SyntaxError: private fields can't be deletedhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Cant_delete_private_fields
SyntaxError: property name __proto__ appears more than once in object literalhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Duplicate_proto
SyntaxError: raw bracket is not allowed in regular expression with unicode flaghttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Regex_raw_bracket
SyntaxError: redeclaration of formal parameter "x"https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Redeclared_parameter
SyntaxError: reference to undeclared private field or method #xhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Undeclared_private_field_or_method
SyntaxError: rest parameter may not have a defaulthttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Rest_with_default
SyntaxError: return not in functionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Bad_return
SyntaxError: setter functions must have one argumenthttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Setter_one_argument
SyntaxError: string literal contains an unescaped line breakhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/String_literal_EOL
SyntaxError: super() is only valid in derived class constructorshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Bad_super_call
SyntaxError: tagged template cannot be used with optional chainhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Bad_optional_template
SyntaxError: Unexpected '#' used outside of class bodyhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Hash_outside_class
SyntaxError: Unexpected tokenhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Unexpected_token
SyntaxError: unlabeled break must be inside loop or switchhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Bad_break
SyntaxError: unparenthesized unary expression can't appear on the left-hand side of '**'https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Unparenthesized_unary_expr_lhs_exponentiation
SyntaxError: use of super property/member accesses only valid within methods or eval code within methodshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Bad_super_prop
SyntaxError: Using //@ to indicate sourceURL pragmas is deprecated. Use //# insteadhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Deprecated_source_map_pragma
TypeError: 'caller', 'callee', and 'arguments' properties may not be accessedhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Deprecated_caller_or_arguments_usage
TypeError: 'x' is not iterablehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/is_not_iterable
TypeError: "x" is (not) "y"https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Unexpected_type
TypeError: "x" is not a constructorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Not_a_constructor
TypeError: "x" is not a functionhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Not_a_function
TypeError: "x" is not a non-null objecthttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/No_non-null_object
TypeError: "x" is read-onlyhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Read-only
TypeError: already executing generatorhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Already_executing_generator
TypeError: BigInt value can't be serialized in JSONhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/BigInt_not_serializable
TypeError: calling a builtin X constructor without new is forbiddenhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Builtin_ctor_no_new
TypeError: can't access/set private field or method: object is not the right classhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Get_set_missing_private
TypeError: can't assign to property "x" on "y": not an objecthttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Cant_assign_to_property
TypeError: can't convert BigInt to numberhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Cant_convert_BigInt_to_number
TypeError: can't convert x to BigInthttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Cant_convert_x_to_BigInt
TypeError: can't define property "x": "obj" is not extensiblehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Cant_define_property_object_not_extensible
TypeError: can't delete non-configurable array elementhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Non_configurable_array_element
TypeError: can't redefine non-configurable property "x"https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Cant_redefine_property
TypeError: can't set prototype of this objecthttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Cant_set_prototype
TypeError: can't set prototype: it would cause a prototype chain cyclehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Cyclic_prototype
TypeError: cannot use 'in' operator to search for 'x' in 'y'https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/in_operator_no_object
TypeError: class constructors must be invoked with 'new'https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Class_ctor_no_new
TypeError: cyclic object valuehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Cyclic_object_value
TypeError: derived class constructor returned invalid value xhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Invalid_derived_return
TypeError: getting private setter-only propertyhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Private_setter_only
TypeError: Initializing an object twice is an error with private fields/methodshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Private_double_initialization
TypeError: invalid 'instanceof' operand 'x'https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/invalid_right_hand_side_instanceof_operand
TypeError: invalid Array.prototype.sort argumenthttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Array_sort_argument
TypeError: invalid assignment to const "x"https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Invalid_const_assignment
TypeError: Iterator/AsyncIterator constructor can't be used directlyhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Constructor_cant_be_used_directly
TypeError: matchAll/replaceAll must be called with a global RegExphttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Requires_global_RegExp
TypeError: More arguments neededhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/More_arguments_needed
TypeError: null/undefined has no propertieshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/No_properties
TypeError: property "x" is non-configurable and can't be deletedhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Cant_delete
TypeError: Reduce of empty array with no initial valuehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Reduce_of_empty_array_with_no_initial_value
TypeError: setting getter-only property "x"https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Getter_only
TypeError: WeakSet key/WeakMap value 'x' must be an object or an unregistered symbolhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Key_not_weakly_held
TypeError: X.prototype.y called on incompatible typehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Called_on_incompatible_type
URIError: malformed URI sequencehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Malformed_URI
Warning: -file- is being assigned a //# sourceMappingURL, but already has onehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Already_has_pragma
Warning: unreachable code after return statementhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Stmt_after_return
JavaScript technologies overviewhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/JavaScript_technologies_overview
Execution modelhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Execution_model
Lexical grammarhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Lexical_grammar
Iteration protocolshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols
Strict modehttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Strict_mode
Template literalshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Template_literals
Trailing commashttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Trailing_commas
Deprecated featureshttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Deprecated_and_obsolete_features
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