# Glossary - Reference [Glossary of Web Terms](https://developer.mozilla.org/en-US/docs/Glossary) ## Web Terms This glossary contains comprehensive web terms categorized across 15 domains: - HTML & Markup - CSS & Styling - JavaScript & Programming - Web APIs & DOM - HTTP & Networking - Security & Authentication - Performance & Optimization - Accessibility - Web Protocols & Standards - Browsers & Engines - Development Tools - Data Formats & Encoding - Media & Graphics - Architecture & Patterns - Servers & Infrastructure ## All Web Terms - [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) - [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) - [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) - [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) - [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) - [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) - [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) - [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) - [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/Ajax) - [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) - [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_container) - [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_subject) - [Alpha (*alpha channel*)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) - [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) - [API](https://developer.mozilla.org/en-US/docs/Glossary/API) - [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) - [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) - [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) - [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) - [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) - [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/ARPANET) - [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) - [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) - [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) - [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) - [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) - [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) - [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) - [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) - [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) - [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) - [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) - [Baseline (*compatibility*)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) - [Baseline (*typography*)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) - [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) - [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) - [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bézier_curve) - [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) - [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) - [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) - [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) - [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) - [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) - [blink element (*\ tag*)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) - [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) - [Block (*CSS*)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) - [Block (*scripting*)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) - [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) - [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) - [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) - [Boolean (*JavaScript*)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) - [Boolean attribute (*ARIA*)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) - [Boolean attribute (*HTML*)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) - [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) - [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) - [Brotli compression](https://developer.mozilla.org/en-US/docs/Glossary/Brotli_compression) - [Browser](https://developer.mozilla.org/en-US/docs/Glossary/Browser) - [Browsing context](https://developer.mozilla.org/en-US/docs/Glossary/Browsing_context) - [Buffer](https://developer.mozilla.org/en-US/docs/Glossary/Buffer) - [Bun](https://developer.mozilla.org/en-US/docs/Glossary/Bun) - [Cache](https://developer.mozilla.org/en-US/docs/Glossary/Cache) - [Cacheable](https://developer.mozilla.org/en-US/docs/Glossary/Cacheable) - [CalDAV](https://developer.mozilla.org/en-US/docs/Glossary/CalDAV) - [Call stack](https://developer.mozilla.org/en-US/docs/Glossary/Call_stack) - [Callback function](https://developer.mozilla.org/en-US/docs/Glossary/Callback_function) - [Camel case](https://developer.mozilla.org/en-US/docs/Glossary/Camel_case) - [Canonical order](https://developer.mozilla.org/en-US/docs/Glossary/Canonical_order) - [Canvas](https://developer.mozilla.org/en-US/docs/Glossary/Canvas) - [Card sorting](https://developer.mozilla.org/en-US/docs/Glossary/Card_sorting) - [CardDAV](https://developer.mozilla.org/en-US/docs/Glossary/CardDAV) - [Caret](https://developer.mozilla.org/en-US/docs/Glossary/Caret) - [CDN](https://developer.mozilla.org/en-US/docs/Glossary/CDN) - [Certificate authority](https://developer.mozilla.org/en-US/docs/Glossary/Certificate_authority) - [Certified](https://developer.mozilla.org/en-US/docs/Glossary/Certified) - [Challenge-response authentication](https://developer.mozilla.org/en-US/docs/Glossary/Challenge-response_authentication) - [Character](https://developer.mozilla.org/en-US/docs/Glossary/Character) - [Character encoding](https://developer.mozilla.org/en-US/docs/Glossary/Character_encoding) - [Character reference](https://developer.mozilla.org/en-US/docs/Glossary/Character_reference) - [Character set](https://developer.mozilla.org/en-US/docs/Glossary/Character_set) - [Chrome](https://developer.mozilla.org/en-US/docs/Glossary/Chrome) - [CIA](https://developer.mozilla.org/en-US/docs/Glossary/CIA) - [Cipher](https://developer.mozilla.org/en-US/docs/Glossary/Cipher) - [Cipher suite](https://developer.mozilla.org/en-US/docs/Glossary/Cipher_suite) - [Ciphertext](https://developer.mozilla.org/en-US/docs/Glossary/Ciphertext) - [Class](https://developer.mozilla.org/en-US/docs/Glossary/Class) - [Client-side rendering (*CSR*)](https://developer.mozilla.org/en-US/docs/Glossary/Client-side_rendering_(CSR)) - [Closure](https://developer.mozilla.org/en-US/docs/Glossary/Closure) - [Cloud](https://developer.mozilla.org/en-US/docs/Glossary/Cloud) - [Cloud computing](https://developer.mozilla.org/en-US/docs/Glossary/Cloud_computing) - [CMS](https://developer.mozilla.org/en-US/docs/Glossary/CMS) - [Code point](https://developer.mozilla.org/en-US/docs/Glossary/Code_point) - [Code splitting](https://developer.mozilla.org/en-US/docs/Glossary/Code_splitting) - [Code unit](https://developer.mozilla.org/en-US/docs/Glossary/Code_unit) - [Codec](https://developer.mozilla.org/en-US/docs/Glossary/Codec) - [Color space](https://developer.mozilla.org/en-US/docs/Glossary/Color_space) - [Color wheel](https://developer.mozilla.org/en-US/docs/Glossary/Color_wheel) - [Compile](https://developer.mozilla.org/en-US/docs/Glossary/Compile) - [Compile time](https://developer.mozilla.org/en-US/docs/Glossary/Compile_time) - [Composite operation](https://developer.mozilla.org/en-US/docs/Glossary/Composite_operation) - [Compression Dictionary Transport](https://developer.mozilla.org/en-US/docs/Glossary/Compression_Dictionary_Transport) - [Computer programming](https://developer.mozilla.org/en-US/docs/Glossary/Computer_programming) - [Conditional](https://developer.mozilla.org/en-US/docs/Glossary/Conditional) - [Constant](https://developer.mozilla.org/en-US/docs/Glossary/Constant) - [Constructor](https://developer.mozilla.org/en-US/docs/Glossary/Constructor) - [Content header](https://developer.mozilla.org/en-US/docs/Glossary/Content_header) - [Continuous integration](https://developer.mozilla.org/en-US/docs/Glossary/Continuous_integration) - [Continuous media](https://developer.mozilla.org/en-US/docs/Glossary/Continuous_media) - [Control flow](https://developer.mozilla.org/en-US/docs/Glossary/Control_flow) - [Cookie](https://developer.mozilla.org/en-US/docs/Glossary/Cookie) - [Copyleft](https://developer.mozilla.org/en-US/docs/Glossary/Copyleft) - [CORS](https://developer.mozilla.org/en-US/docs/Glossary/CORS) - [CORS-safelisted request header](https://developer.mozilla.org/en-US/docs/Glossary/CORS-safelisted_request_header) - [CORS-safelisted response header](https://developer.mozilla.org/en-US/docs/Glossary/CORS-safelisted_response_header) - [Crawler](https://developer.mozilla.org/en-US/docs/Glossary/Crawler) - [Credential](https://developer.mozilla.org/en-US/docs/Glossary/Credential) - [CRLF](https://developer.mozilla.org/en-US/docs/Glossary/CRLF) - [Cross Axis](https://developer.mozilla.org/en-US/docs/Glossary/Cross_Axis) - [Cross-site request forgery (*CSRF*)](https://developer.mozilla.org/en-US/docs/Glossary/CSRF) - [Cross-site scripting (*XSS*)](https://developer.mozilla.org/en-US/docs/Glossary/Cross-site_scripting) - [CRUD](https://developer.mozilla.org/en-US/docs/Glossary/CRUD) - [Cryptanalysis](https://developer.mozilla.org/en-US/docs/Glossary/Cryptanalysis) - [Cryptography](https://developer.mozilla.org/en-US/docs/Glossary/Cryptography) - [CSP](https://developer.mozilla.org/en-US/docs/Glossary/CSP) - [CSS](https://developer.mozilla.org/en-US/docs/Glossary/CSS) - [CSS Object Model (*CSSOM*)](https://developer.mozilla.org/en-US/docs/Glossary/CSS_Object_Model_(CSSOM)) - [CSS pixel](https://developer.mozilla.org/en-US/docs/Glossary/CSS_pixel) - [CSS preprocessor](https://developer.mozilla.org/en-US/docs/Glossary/CSS_preprocessor) - [Cumulative Layout Shift (*CLS*)](https://developer.mozilla.org/en-US/docs/Glossary/CLS) - [Data structure](https://developer.mozilla.org/en-US/docs/Glossary/Data_structure) - [Database](https://developer.mozilla.org/en-US/docs/Glossary/Database) - [Debounce](https://developer.mozilla.org/en-US/docs/Glossary/Debounce) - [Decryption](https://developer.mozilla.org/en-US/docs/Glossary/Decryption) - [Deep copy](https://developer.mozilla.org/en-US/docs/Glossary/Deep_copy) - [Delta](https://developer.mozilla.org/en-US/docs/Glossary/Delta) - [Denial of Service (*DoS*)](https://developer.mozilla.org/en-US/docs/Glossary/Denial_of_Service) - [Deno](https://developer.mozilla.org/en-US/docs/Glossary/Deno) - [Descriptor (*CSS*)](https://developer.mozilla.org/en-US/docs/Glossary/Descriptor_(CSS)) - [Deserialization](https://developer.mozilla.org/en-US/docs/Glossary/Deserialization) - [Developer tools](https://developer.mozilla.org/en-US/docs/Glossary/Developer_tools) - [Device pixel](https://developer.mozilla.org/en-US/docs/Glossary/Device_pixel) - [Digital certificate](https://developer.mozilla.org/en-US/docs/Glossary/Digital_certificate) - [Digital signature](https://developer.mozilla.org/en-US/docs/Glossary/Digital_signature) - [Distributed Denial of Service (*DDoS*)](https://developer.mozilla.org/en-US/docs/Glossary/Distributed_Denial_of_Service) - [DMZ](https://developer.mozilla.org/en-US/docs/Glossary/DMZ) - [DNS](https://developer.mozilla.org/en-US/docs/Glossary/DNS) - [Doctype](https://developer.mozilla.org/en-US/docs/Glossary/Doctype) - [Document directive](https://developer.mozilla.org/en-US/docs/Glossary/Document_directive) - [Document environment](https://developer.mozilla.org/en-US/docs/Glossary/Document_environment) - [DOM (*Document Object Model*)](https://developer.mozilla.org/en-US/docs/Glossary/DOM) - [Domain](https://developer.mozilla.org/en-US/docs/Glossary/Domain) - [Domain name](https://developer.mozilla.org/en-US/docs/Glossary/Domain_name) - [Domain sharding](https://developer.mozilla.org/en-US/docs/Glossary/Domain_sharding) - [Dominator](https://developer.mozilla.org/en-US/docs/Glossary/Dominator) - [DSL](https://developer.mozilla.org/en-US/docs/Glossary/DSL) - [DSL (*Digital Subscriber Line*)](https://developer.mozilla.org/en-US/docs/Glossary/DSL/Digital_Subscriber_Line) - [DSL (*Domain-Specific Language*)](https://developer.mozilla.org/en-US/docs/Glossary/DSL/Domain-Specific_Language) - [DTLS (*Datagram Transport Layer Security*)](https://developer.mozilla.org/en-US/docs/Glossary/DTLS) - [DTMF (*Dual-Tone Multi-Frequency signaling*)](https://developer.mozilla.org/en-US/docs/Glossary/DTMF) - [Dynamic typing](https://developer.mozilla.org/en-US/docs/Glossary/Dynamic_typing) - [ECMA](https://developer.mozilla.org/en-US/docs/Glossary/ECMA) - [ECMAScript](https://developer.mozilla.org/en-US/docs/Glossary/ECMAScript) - [Effective connection type](https://developer.mozilla.org/en-US/docs/Glossary/Effective_connection_type) - [Element](https://developer.mozilla.org/en-US/docs/Glossary/Element) - [Encapsulation](https://developer.mozilla.org/en-US/docs/Glossary/Encapsulation) - [Encryption](https://developer.mozilla.org/en-US/docs/Glossary/Encryption) - [Endianness](https://developer.mozilla.org/en-US/docs/Glossary/Endianness) - [Engine](https://developer.mozilla.org/en-US/docs/Glossary/Engine) - [JavaScript engine](https://developer.mozilla.org/en-US/docs/Glossary/JavaScript_engine) - [Rendering engine](https://developer.mozilla.org/en-US/docs/Glossary/Rendering_engine) - [Entity](https://developer.mozilla.org/en-US/docs/Glossary/Entity) - [Entity header](https://developer.mozilla.org/en-US/docs/Glossary/Entity_header) - [Enumerated](https://developer.mozilla.org/en-US/docs/Glossary/Enumerated) - [Escape character](https://developer.mozilla.org/en-US/docs/Glossary/Escape_character) - [Event](https://developer.mozilla.org/en-US/docs/Glossary/Event) - [Exception](https://developer.mozilla.org/en-US/docs/Glossary/Exception) - [EXIF](https://developer.mozilla.org/en-US/docs/Glossary/EXIF) - [Expando](https://developer.mozilla.org/en-US/docs/Glossary/Expando) - [Extrinsic size](https://developer.mozilla.org/en-US/docs/Glossary/Extrinsic_size) - [Fallback alignment](https://developer.mozilla.org/en-US/docs/Glossary/Fallback_alignment) - [Falsy](https://developer.mozilla.org/en-US/docs/Glossary/Falsy) - [Favicon](https://developer.mozilla.org/en-US/docs/Glossary/Favicon) - [Federated identity](https://developer.mozilla.org/en-US/docs/Glossary/Federated_identity) - [Fetch directive](https://developer.mozilla.org/en-US/docs/Glossary/Fetch_directive) - [Fetch metadata request header](https://developer.mozilla.org/en-US/docs/Glossary/Fetch_metadata_request_header) - [Fingerprinting](https://developer.mozilla.org/en-US/docs/Glossary/Fingerprinting) - [Firefox OS](https://developer.mozilla.org/en-US/docs/Glossary/Firefox_OS) - [Firewall](https://developer.mozilla.org/en-US/docs/Glossary/Firewall) - [First Contentful Paint (*FCP*)](https://developer.mozilla.org/en-US/docs/Glossary/First_Contentful_Paint_(FCP)) - [First CPU idle](https://developer.mozilla.org/en-US/docs/Glossary/First_CPU_idle) - [First Input Delay (FID)Deprecated](https://developer.mozilla.org/en-US/docs/Glossary/First_Input_Delay) - [First Meaningful Paint (*FMP*)](https://developer.mozilla.org/en-US/docs/Glossary/First_meaningful_paint) - [First Paint (*FP*)](https://developer.mozilla.org/en-US/docs/Glossary/First_paint) - [First-class function](https://developer.mozilla.org/en-US/docs/Glossary/First-class_function) - [Flex](https://developer.mozilla.org/en-US/docs/Glossary/Flex) - [Flex container](https://developer.mozilla.org/en-US/docs/Glossary/Flex_container) - [Flex item](https://developer.mozilla.org/en-US/docs/Glossary/Flex_item) - [Flexbox](https://developer.mozilla.org/en-US/docs/Glossary/Flexbox) - [Flow relative values](https://developer.mozilla.org/en-US/docs/Glossary/Flow_relative_values) - [Forbidden request header](https://developer.mozilla.org/en-US/docs/Glossary/Forbidden_request_header) - [Forbidden response header name](https://developer.mozilla.org/en-US/docs/Glossary/Forbidden_response_header_name) - [Fork](https://developer.mozilla.org/en-US/docs/Glossary/Fork) - [Fragmentainer](https://developer.mozilla.org/en-US/docs/Glossary/Fragmentainer) - [Frame rate (*FPS*)](https://developer.mozilla.org/en-US/docs/Glossary/FPS) - [FTP](https://developer.mozilla.org/en-US/docs/Glossary/FTP) - [FTU](https://developer.mozilla.org/en-US/docs/Glossary/FTU) - [Function](https://developer.mozilla.org/en-US/docs/Glossary/Function) - [Fuzz testing](https://developer.mozilla.org/en-US/docs/Glossary/Fuzz_testing) - [Gamut](https://developer.mozilla.org/en-US/docs/Glossary/Gamut) - [Garbage collection](https://developer.mozilla.org/en-US/docs/Glossary/Garbage_collection) - [Gecko](https://developer.mozilla.org/en-US/docs/Glossary/Gecko) - [General header](https://developer.mozilla.org/en-US/docs/Glossary/General_header) - [GIF](https://developer.mozilla.org/en-US/docs/Glossary/GIF) - [Git](https://developer.mozilla.org/en-US/docs/Glossary/Git) - [Global object](https://developer.mozilla.org/en-US/docs/Glossary/Global_object) - [Global scope](https://developer.mozilla.org/en-US/docs/Glossary/Global_scope) - [Global variable](https://developer.mozilla.org/en-US/docs/Glossary/Global_variable) - [Glyph](https://developer.mozilla.org/en-US/docs/Glossary/Glyph) - [Google Chrome](https://developer.mozilla.org/en-US/docs/Glossary/Google_Chrome) - [GPL](https://developer.mozilla.org/en-US/docs/Glossary/GPL) - [GPU](https://developer.mozilla.org/en-US/docs/Glossary/GPU) - [Graceful degradation](https://developer.mozilla.org/en-US/docs/Glossary/Graceful_degradation) - [Grid](https://developer.mozilla.org/en-US/docs/Glossary/Grid) - [Grid areas](https://developer.mozilla.org/en-US/docs/Glossary/Grid_areas) - [Grid Axis](https://developer.mozilla.org/en-US/docs/Glossary/Grid_Axis) - [Grid Cell](https://developer.mozilla.org/en-US/docs/Glossary/Grid_Cell) - [Grid Column](https://developer.mozilla.org/en-US/docs/Glossary/Grid_Column) - [Grid container](https://developer.mozilla.org/en-US/docs/Glossary/Grid_container) - [Grid lines](https://developer.mozilla.org/en-US/docs/Glossary/Grid_lines) - [Grid Row](https://developer.mozilla.org/en-US/docs/Glossary/Grid_Row) - [Grid Tracks](https://developer.mozilla.org/en-US/docs/Glossary/Grid_Tracks) - [Guaranteed-invalid value](https://developer.mozilla.org/en-US/docs/Glossary/Guaranteed-invalid_value) - [Gutters](https://developer.mozilla.org/en-US/docs/Glossary/Gutters) - [gzip compression](https://developer.mozilla.org/en-US/docs/Glossary/gzip_compression) - [Hash function](https://developer.mozilla.org/en-US/docs/Glossary/Hash_function) - [Hash routing](https://developer.mozilla.org/en-US/docs/Glossary/Hash_routing) - [Head](https://developer.mozilla.org/en-US/docs/Glossary/Head) - [High-level programming language](https://developer.mozilla.org/en-US/docs/Glossary/High-level_programming_language) - [HMAC](https://developer.mozilla.org/en-US/docs/Glossary/HMAC) - [Hoisting](https://developer.mozilla.org/en-US/docs/Glossary/Hoisting) - [HOL blocking](https://developer.mozilla.org/en-US/docs/Glossary/HOL_blocking) - [Host](https://developer.mozilla.org/en-US/docs/Glossary/Host) - [Hotlink](https://developer.mozilla.org/en-US/docs/Glossary/Hotlink) - [Houdini](https://developer.mozilla.org/en-US/docs/Glossary/Houdini) - [HPKP](https://developer.mozilla.org/en-US/docs/Glossary/HPKP) - [HSTS](https://developer.mozilla.org/en-US/docs/Glossary/HSTS) - [HTML](https://developer.mozilla.org/en-US/docs/Glossary/HTML) - [HTML color codes](https://developer.mozilla.org/en-US/docs/Glossary/HTML_color_codes) - [HTML5](https://developer.mozilla.org/en-US/docs/Glossary/HTML5) - [HTTP](https://developer.mozilla.org/en-US/docs/Glossary/HTTP) - [HTTP content](https://developer.mozilla.org/en-US/docs/Glossary/HTTP_content) - [HTTP header](https://developer.mozilla.org/en-US/docs/Glossary/HTTP_header) - [HTTP/2](https://developer.mozilla.org/en-US/docs/Glossary/HTTP/2) - [HTTP/3](https://developer.mozilla.org/en-US/docs/Glossary/HTTP/3) - [HTTPS](https://developer.mozilla.org/en-US/docs/Glossary/HTTPS) - [HTTPS RR](https://developer.mozilla.org/en-US/docs/Glossary/HTTPS_RR) - [Hyperlink](https://developer.mozilla.org/en-US/docs/Glossary/Hyperlink) - [Hypertext](https://developer.mozilla.org/en-US/docs/Glossary/Hypertext) - [IANA](https://developer.mozilla.org/en-US/docs/Glossary/IANA) - [ICANN](https://developer.mozilla.org/en-US/docs/Glossary/ICANN) - [ICE](https://developer.mozilla.org/en-US/docs/Glossary/ICE) - [IDE](https://developer.mozilla.org/en-US/docs/Glossary/IDE) - [Idempotent](https://developer.mozilla.org/en-US/docs/Glossary/Idempotent) - [Identifier](https://developer.mozilla.org/en-US/docs/Glossary/Identifier) - [Identity provider (*IdP*)](https://developer.mozilla.org/en-US/docs/Glossary/Identity_provider) - [IDL](https://developer.mozilla.org/en-US/docs/Glossary/IDL) - [IETF](https://developer.mozilla.org/en-US/docs/Glossary/IETF) - [IIFE](https://developer.mozilla.org/en-US/docs/Glossary/IIFE) - [IMAP](https://developer.mozilla.org/en-US/docs/Glossary/IMAP) - [Immutable](https://developer.mozilla.org/en-US/docs/Glossary/Immutable) - [IndexedDB](https://developer.mozilla.org/en-US/docs/Glossary/IndexedDB) - [Information architecture](https://developer.mozilla.org/en-US/docs/Glossary/Information_architecture) - [Inheritance](https://developer.mozilla.org/en-US/docs/Glossary/Inheritance) - [Ink overflow](https://developer.mozilla.org/en-US/docs/Glossary/Ink_overflow) - [Inline-level content](https://developer.mozilla.org/en-US/docs/Glossary/Inline-level_content) - [Input method editor](https://developer.mozilla.org/en-US/docs/Glossary/Input_method_editor) - [Inset properties](https://developer.mozilla.org/en-US/docs/Glossary/Inset_properties) - [Instance](https://developer.mozilla.org/en-US/docs/Glossary/Instance) - [Interaction to Next Paint (*INP*)](https://developer.mozilla.org/en-US/docs/Glossary/interaction_to_next_paint) - [Internationalization (*i18n*)](https://developer.mozilla.org/en-US/docs/Glossary/Internationalization) - [Internet](https://developer.mozilla.org/en-US/docs/Glossary/Internet) - [Interpolation](https://developer.mozilla.org/en-US/docs/Glossary/Interpolation) - [Intrinsic size](https://developer.mozilla.org/en-US/docs/Glossary/Intrinsic_size) - [Invariant](https://developer.mozilla.org/en-US/docs/Glossary/Invariant) - [IP Address](https://developer.mozilla.org/en-US/docs/Glossary/IP_Address) - [IPv4](https://developer.mozilla.org/en-US/docs/Glossary/IPv4) - [IPv6](https://developer.mozilla.org/en-US/docs/Glossary/IPv6) - [IRC](https://developer.mozilla.org/en-US/docs/Glossary/IRC) - [ISO](https://developer.mozilla.org/en-US/docs/Glossary/ISO) - [ISP](https://developer.mozilla.org/en-US/docs/Glossary/ISP) - [ITU](https://developer.mozilla.org/en-US/docs/Glossary/ITU) - [Jank](https://developer.mozilla.org/en-US/docs/Glossary/Jank) - [Java](https://developer.mozilla.org/en-US/docs/Glossary/Java) - [JavaScript](https://developer.mozilla.org/en-US/docs/Glossary/JavaScript) - [Jitter](https://developer.mozilla.org/en-US/docs/Glossary/Jitter) - [JPEG](https://developer.mozilla.org/en-US/docs/Glossary/JPEG) - [JSON](https://developer.mozilla.org/en-US/docs/Glossary/JSON) - [JSON type representation](https://developer.mozilla.org/en-US/docs/Glossary/JSON_type_representation) - [Just-In-Time Compilation (*JIT*)](https://developer.mozilla.org/en-US/docs/Glossary/Just-in-time_compilation) - [Kebab case](https://developer.mozilla.org/en-US/docs/Glossary/Kebab_case) - [Key](https://developer.mozilla.org/en-US/docs/Glossary/Key) - [Keyword](https://developer.mozilla.org/en-US/docs/Glossary/Keyword) - [Largest Contentful Paint (*LCP*)](https://developer.mozilla.org/en-US/docs/Glossary/Largest_contentful_paint) - [Latency](https://developer.mozilla.org/en-US/docs/Glossary/Latency) - [Layout mode](https://developer.mozilla.org/en-US/docs/Glossary/Layout_mode) - [Layout viewport](https://developer.mozilla.org/en-US/docs/Glossary/Layout_viewport) - [Lazy load](https://developer.mozilla.org/en-US/docs/Glossary/Lazy_load) - [Leading](https://developer.mozilla.org/en-US/docs/Glossary/Leading) - [LGPL](https://developer.mozilla.org/en-US/docs/Glossary/LGPL) - [Ligature](https://developer.mozilla.org/en-US/docs/Glossary/Ligature) - [Literal](https://developer.mozilla.org/en-US/docs/Glossary/Literal) - [Local scope](https://developer.mozilla.org/en-US/docs/Glossary/Local_scope) - [Local variable](https://developer.mozilla.org/en-US/docs/Glossary/Local_variable) - [Locale](https://developer.mozilla.org/en-US/docs/Glossary/Locale) - [Localization](https://developer.mozilla.org/en-US/docs/Glossary/Localization) - [Logical properties](https://developer.mozilla.org/en-US/docs/Glossary/Logical_properties) - [Long task](https://developer.mozilla.org/en-US/docs/Glossary/Long_task) - [Loop](https://developer.mozilla.org/en-US/docs/Glossary/Loop) - [Lossless compression](https://developer.mozilla.org/en-US/docs/Glossary/Lossless_compression) - [Lossy compression](https://developer.mozilla.org/en-US/docs/Glossary/Lossy_compression) - [LTR (*Left To Right*)](https://developer.mozilla.org/en-US/docs/Glossary/LTR) - [Main axis](https://developer.mozilla.org/en-US/docs/Glossary/Main_axis) - [Main thread](https://developer.mozilla.org/en-US/docs/Glossary/Main_thread) - [Markup](https://developer.mozilla.org/en-US/docs/Glossary/Markup) - [MathML](https://developer.mozilla.org/en-US/docs/Glossary/MathML) - [Media](https://developer.mozilla.org/en-US/docs/Glossary/Media) - [Media (*Audio-visual presentation*)](https://developer.mozilla.org/en-US/docs/Glossary/Media/Audio-visual_presentation) - [Media (*CSS*)](https://developer.mozilla.org/en-US/docs/Glossary/Media/CSS) - [Media query](https://developer.mozilla.org/en-US/docs/Glossary/Media_query) - [Metadata](https://developer.mozilla.org/en-US/docs/Glossary/Metadata) - [Method](https://developer.mozilla.org/en-US/docs/Glossary/Method) - [Microsoft Edge](https://developer.mozilla.org/en-US/docs/Glossary/Microsoft_Edge) - [Microsoft Internet Explorer](https://developer.mozilla.org/en-US/docs/Glossary/Microsoft_Internet_Explorer) - [Middleware](https://developer.mozilla.org/en-US/docs/Glossary/Middleware) - [MIME](https://developer.mozilla.org/en-US/docs/Glossary/MIME) - [MIME type](https://developer.mozilla.org/en-US/docs/Glossary/MIME_type) - [Minification](https://developer.mozilla.org/en-US/docs/Glossary/Minification) - [MitM](https://developer.mozilla.org/en-US/docs/Glossary/MitM) - [Mixin](https://developer.mozilla.org/en-US/docs/Glossary/Mixin) - [Mobile first](https://developer.mozilla.org/en-US/docs/Glossary/Mobile_first) - [Modem](https://developer.mozilla.org/en-US/docs/Glossary/Modem) - [Modularity](https://developer.mozilla.org/en-US/docs/Glossary/Modularity) - [Mozilla Firefox](https://developer.mozilla.org/en-US/docs/Glossary/Mozilla_Firefox) - [Multi-factor authentication](https://developer.mozilla.org/en-US/docs/Glossary/Multi-factor_authentication) - [Mutable](https://developer.mozilla.org/en-US/docs/Glossary/Mutable) - [MVC](https://developer.mozilla.org/en-US/docs/Glossary/MVC) - [Namespace](https://developer.mozilla.org/en-US/docs/Glossary/Namespace) - [NaN](https://developer.mozilla.org/en-US/docs/Glossary/NaN) - [NAT](https://developer.mozilla.org/en-US/docs/Glossary/NAT) - [Native](https://developer.mozilla.org/en-US/docs/Glossary/Native) - [Navigation directive](https://developer.mozilla.org/en-US/docs/Glossary/Navigation_directive) - [Netscape Navigator](https://developer.mozilla.org/en-US/docs/Glossary/Netscape_Navigator) - [Network throttling](https://developer.mozilla.org/en-US/docs/Glossary/Network_throttling) - [NNTP](https://developer.mozilla.org/en-US/docs/Glossary/NNTP) - [Node](https://developer.mozilla.org/en-US/docs/Glossary/Node) - [Node (*DOM*)](https://developer.mozilla.org/en-US/docs/Glossary/Node/DOM) - [Node (*networking*)](https://developer.mozilla.org/en-US/docs/Glossary/Node/Networking) - [Node.js](https://developer.mozilla.org/en-US/docs/Glossary/Node.js) - [Non-normative](https://developer.mozilla.org/en-US/docs/Glossary/Non-normative) - [Nonce](https://developer.mozilla.org/en-US/docs/Glossary/Nonce) - [Normative](https://developer.mozilla.org/en-US/docs/Glossary/Normative) - [Null](https://developer.mozilla.org/en-US/docs/Glossary/Null) - [Nullish value](https://developer.mozilla.org/en-US/docs/Glossary/Nullish_value) - [Number](https://developer.mozilla.org/en-US/docs/Glossary/Number) - [Object](https://developer.mozilla.org/en-US/docs/Glossary/Object) - [Object reference](https://developer.mozilla.org/en-US/docs/Glossary/Object_reference) - [OOP](https://developer.mozilla.org/en-US/docs/Glossary/OOP) - [OpenGL](https://developer.mozilla.org/en-US/docs/Glossary/OpenGL) - [OpenSSL](https://developer.mozilla.org/en-US/docs/Glossary/OpenSSL) - [Opera browser](https://developer.mozilla.org/en-US/docs/Glossary/Opera_browser) - [Operand](https://developer.mozilla.org/en-US/docs/Glossary/Operand) - [Operator](https://developer.mozilla.org/en-US/docs/Glossary/Operator) - [Origin](https://developer.mozilla.org/en-US/docs/Glossary/Origin) - [OTA](https://developer.mozilla.org/en-US/docs/Glossary/OTA) - [OWASP](https://developer.mozilla.org/en-US/docs/Glossary/OWASP) - [P2P](https://developer.mozilla.org/en-US/docs/Glossary/P2P) - [PAC](https://developer.mozilla.org/en-US/docs/Glossary/PAC) - [Packet](https://developer.mozilla.org/en-US/docs/Glossary/Packet) - [Page load time](https://developer.mozilla.org/en-US/docs/Glossary/Page_load_time) - [Page prediction](https://developer.mozilla.org/en-US/docs/Glossary/Page_prediction) - [Parameter](https://developer.mozilla.org/en-US/docs/Glossary/Parameter) - [Parent object](https://developer.mozilla.org/en-US/docs/Glossary/Parent_object) - [Parse](https://developer.mozilla.org/en-US/docs/Glossary/Parse) - [Parser](https://developer.mozilla.org/en-US/docs/Glossary/Parser) - [Payload body](https://developer.mozilla.org/en-US/docs/Glossary/Payload_body) - [Payload header](https://developer.mozilla.org/en-US/docs/Glossary/Payload_header) - [PDF](https://developer.mozilla.org/en-US/docs/Glossary/PDF) - [Perceived performance](https://developer.mozilla.org/en-US/docs/Glossary/Perceived_performance) - [Percent-encoding](https://developer.mozilla.org/en-US/docs/Glossary/Percent-encoding) - [PHP](https://developer.mozilla.org/en-US/docs/Glossary/PHP) - [Physical properties](https://developer.mozilla.org/en-US/docs/Glossary/Physical_properties) - [Pixel](https://developer.mozilla.org/en-US/docs/Glossary/Pixel) - [Placeholder names](https://developer.mozilla.org/en-US/docs/Glossary/Placeholder_names) - [Plaintext](https://developer.mozilla.org/en-US/docs/Glossary/Plaintext) - [Plugin](https://developer.mozilla.org/en-US/docs/Glossary/Plugin) - [PNG](https://developer.mozilla.org/en-US/docs/Glossary/PNG) - [Polyfill](https://developer.mozilla.org/en-US/docs/Glossary/Polyfill) - [Polymorphism](https://developer.mozilla.org/en-US/docs/Glossary/Polymorphism) - [POP3](https://developer.mozilla.org/en-US/docs/Glossary/POP3) - [Port](https://developer.mozilla.org/en-US/docs/Glossary/Port) - [Prefetch](https://developer.mozilla.org/en-US/docs/Glossary/Prefetch) - [Preflight request](https://developer.mozilla.org/en-US/docs/Glossary/Preflight_request) - [Prerender](https://developer.mozilla.org/en-US/docs/Glossary/Prerender) - [Presto](https://developer.mozilla.org/en-US/docs/Glossary/Presto) - [Primitive](https://developer.mozilla.org/en-US/docs/Glossary/Primitive) - [Principle of least privilege](https://developer.mozilla.org/en-US/docs/Glossary/Principle_of_least_privilege) - [Privileged](https://developer.mozilla.org/en-US/docs/Glossary/Privileged) - [Privileged code](https://developer.mozilla.org/en-US/docs/Glossary/Privileged_code) - [Progressive enhancement](https://developer.mozilla.org/en-US/docs/Glossary/Progressive_enhancement) - [Progressive web applications (*PWAs*)](https://developer.mozilla.org/en-US/docs/Glossary/Progressive_web_apps) - [Promise](https://developer.mozilla.org/en-US/docs/Glossary/Promise) - [Property](https://developer.mozilla.org/en-US/docs/Glossary/Property) - [Property (*CSS*)](https://developer.mozilla.org/en-US/docs/Glossary/Property/CSS) - [Property (*JavaScript*)](https://developer.mozilla.org/en-US/docs/Glossary/Property/JavaScript) - [Protocol](https://developer.mozilla.org/en-US/docs/Glossary/Protocol) - [Prototype](https://developer.mozilla.org/en-US/docs/Glossary/Prototype) - [Prototype-based programming](https://developer.mozilla.org/en-US/docs/Glossary/Prototype-based_programming) - [Proxy server](https://developer.mozilla.org/en-US/docs/Glossary/Proxy_server) - [Pseudo-class](https://developer.mozilla.org/en-US/docs/Glossary/Pseudo-class) - [Pseudo-element](https://developer.mozilla.org/en-US/docs/Glossary/Pseudo-element) - [Pseudocode](https://developer.mozilla.org/en-US/docs/Glossary/Pseudocode) - [Public-key cryptography](https://developer.mozilla.org/en-US/docs/Glossary/Public-key_cryptography) - [Python](https://developer.mozilla.org/en-US/docs/Glossary/Python) - [Quality values](https://developer.mozilla.org/en-US/docs/Glossary/Quality_values) - [Quaternion](https://developer.mozilla.org/en-US/docs/Glossary/Quaternion) - [QUIC](https://developer.mozilla.org/en-US/docs/Glossary/QUIC) - [RAIL](https://developer.mozilla.org/en-US/docs/Glossary/RAIL) - [Random Number Generator](https://developer.mozilla.org/en-US/docs/Glossary/Random_Number_Generator) - [Raster image](https://developer.mozilla.org/en-US/docs/Glossary/Raster_image) - [Rate limit](https://developer.mozilla.org/en-US/docs/Glossary/Rate_limit) - [RDF](https://developer.mozilla.org/en-US/docs/Glossary/RDF) - [Reading order](https://developer.mozilla.org/en-US/docs/Glossary/Reading_order) - [Real User Monitoring (*RUM*)](https://developer.mozilla.org/en-US/docs/Glossary/Real_User_Monitoring) - [Recursion](https://developer.mozilla.org/en-US/docs/Glossary/Recursion) - [Reflow](https://developer.mozilla.org/en-US/docs/Glossary/Reflow) - [Registrable domain](https://developer.mozilla.org/en-US/docs/Glossary/Registrable_domain) - [Regular expression](https://developer.mozilla.org/en-US/docs/Glossary/Regular_expression) - [Relying party](https://developer.mozilla.org/en-US/docs/Glossary/Relying_party) - [Render-blocking](https://developer.mozilla.org/en-US/docs/Glossary/Render-blocking) - [Repaint](https://developer.mozilla.org/en-US/docs/Glossary/Repaint) - [Replaced elements](https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements) - [Replay attack](https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack) - [Repo](https://developer.mozilla.org/en-US/docs/Glossary/Repo) - [Reporting directive](https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive) - [Representation header](https://developer.mozilla.org/en-US/docs/Glossary/Representation_header) - [Request header](https://developer.mozilla.org/en-US/docs/Glossary/Request_header) - [Resource Timing](https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing) - [Response header](https://developer.mozilla.org/en-US/docs/Glossary/Response_header) - [Responsive Web Design (*RWD*)](https://developer.mozilla.org/en-US/docs/Glossary/Responsive_Web_Design) - [REST](https://developer.mozilla.org/en-US/docs/Glossary/REST) - [RGB](https://developer.mozilla.org/en-US/docs/Glossary/RGB) - [RIL](https://developer.mozilla.org/en-US/docs/Glossary/RIL) - [Robots.txt](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt) - [Round Trip Time (*RTT*)](https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time) - [Router](https://developer.mozilla.org/en-US/docs/Glossary/Router) - [RSS](https://developer.mozilla.org/en-US/docs/Glossary/RSS) - [Rsync](https://developer.mozilla.org/en-US/docs/Glossary/Rsync) - [RTCP (*RTP Control Protocol*)](https://developer.mozilla.org/en-US/docs/Glossary/RTCP) - [RTF](https://developer.mozilla.org/en-US/docs/Glossary/RTF) - [RTL (*Right to Left*)](https://developer.mozilla.org/en-US/docs/Glossary/RTL) - [RTP (*Real-time Transport Protocol*) and SRTP (*Secure RTP*)](https://developer.mozilla.org/en-US/docs/Glossary/RTP) - [RTSP: Real-time streaming protocol](https://developer.mozilla.org/en-US/docs/Glossary/RTSP) - [Ruby](https://developer.mozilla.org/en-US/docs/Glossary/Ruby) - [Safe](https://developer.mozilla.org/en-US/docs/Glossary/Safe) - [Safe (*HTTP Methods*)](https://developer.mozilla.org/en-US/docs/Glossary/Safe/HTTP) - [Salt](https://developer.mozilla.org/en-US/docs/Glossary/Salt) - [Same-origin policy](https://developer.mozilla.org/en-US/docs/Glossary/Same-origin_policy) - [SCM](https://developer.mozilla.org/en-US/docs/Glossary/SCM) - [Scope](https://developer.mozilla.org/en-US/docs/Glossary/Scope) - [Screen reader](https://developer.mozilla.org/en-US/docs/Glossary/Screen_reader) - [Script-supporting element](https://developer.mozilla.org/en-US/docs/Glossary/Script-supporting_element) - [Scroll boundary](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_boundary) - [Scroll chaining](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_chaining) - [Scroll container](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_container) - [Scroll snap](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_snap) - [SCTP](https://developer.mozilla.org/en-US/docs/Glossary/SCTP) - [SDK (*Software Development Kit*)](https://developer.mozilla.org/en-US/docs/Glossary/SDK) - [SDP](https://developer.mozilla.org/en-US/docs/Glossary/SDP) - [Search engine](https://developer.mozilla.org/en-US/docs/Glossary/Search_engine) - [Secure context](https://developer.mozilla.org/en-US/docs/Glossary/Secure_context) - [Secure Sockets Layer (*SSL*)](https://developer.mozilla.org/en-US/docs/Glossary/SSL) - [Selector (*CSS*)](https://developer.mozilla.org/en-US/docs/Glossary/CSS_Selector) - [Semantics](https://developer.mozilla.org/en-US/docs/Glossary/Semantics) - [SEO](https://developer.mozilla.org/en-US/docs/Glossary/SEO) - [Serializable object](https://developer.mozilla.org/en-US/docs/Glossary/Serializable_object) - [Serialization](https://developer.mozilla.org/en-US/docs/Glossary/Serialization) - [Server](https://developer.mozilla.org/en-US/docs/Glossary/Server) - [Server Timing](https://developer.mozilla.org/en-US/docs/Glossary/Server_Timing) - [Server-side rendering (*SSR*)](https://developer.mozilla.org/en-US/docs/Glossary/SSR) - [Session hijacking](https://developer.mozilla.org/en-US/docs/Glossary/Session_hijacking) - [SGML](https://developer.mozilla.org/en-US/docs/Glossary/SGML) - [Shadow tree](https://developer.mozilla.org/en-US/docs/Glossary/Shadow_tree) - [Shallow copy](https://developer.mozilla.org/en-US/docs/Glossary/Shallow_copy) - [Shim](https://developer.mozilla.org/en-US/docs/Glossary/Shim) - [Signature](https://developer.mozilla.org/en-US/docs/Glossary/Signature) - [Signature (*functions*)](https://developer.mozilla.org/en-US/docs/Glossary/Signature_(functions)) - [Signature (*security*)](https://developer.mozilla.org/en-US/docs/Glossary/Signature_(security)) - [SIMD](https://developer.mozilla.org/en-US/docs/Glossary/SIMD) - [SISD](https://developer.mozilla.org/en-US/docs/Glossary/SISD) - [Site](https://developer.mozilla.org/en-US/docs/Glossary/Site) - [Site map](https://developer.mozilla.org/en-US/docs/Glossary/Site_map) - [SLD](https://developer.mozilla.org/en-US/docs/Glossary/SLD) - [Sloppy mode](https://developer.mozilla.org/en-US/docs/Glossary/Sloppy_mode) - [Slug](https://developer.mozilla.org/en-US/docs/Glossary/Slug) - [Smoke test](https://developer.mozilla.org/en-US/docs/Glossary/Smoke_test) - [SMPTE (*Society of Motion Picture and Television Engineers*)](https://developer.mozilla.org/en-US/docs/Glossary/SMPTE) - [SMTP](https://developer.mozilla.org/en-US/docs/Glossary/SMTP) - [Snake case](https://developer.mozilla.org/en-US/docs/Glossary/Snake_case) - [Snap positions](https://developer.mozilla.org/en-US/docs/Glossary/Snap_positions) - [SOAP](https://developer.mozilla.org/en-US/docs/Glossary/SOAP) - [Social engineering](https://developer.mozilla.org/en-US/docs/Glossary/Social_engineering) - [Source map](https://developer.mozilla.org/en-US/docs/Glossary/Source_map) - [SPA (*Single-page application*)](https://developer.mozilla.org/en-US/docs/Glossary/SPA) - [Specification](https://developer.mozilla.org/en-US/docs/Glossary/Specification) - [Speculative parsing](https://developer.mozilla.org/en-US/docs/Glossary/Speculative_parsing) - [Speed index](https://developer.mozilla.org/en-US/docs/Glossary/Speed_index) - [SQL](https://developer.mozilla.org/en-US/docs/Glossary/SQL) - [SQL injection](https://developer.mozilla.org/en-US/docs/Glossary/SQL_injection) - [SRI](https://developer.mozilla.org/en-US/docs/Glossary/SRI) - [Stacking context](https://developer.mozilla.org/en-US/docs/Glossary/Stacking_context) - [State machine](https://developer.mozilla.org/en-US/docs/Glossary/State_machine) - [Statement](https://developer.mozilla.org/en-US/docs/Glossary/Statement) - [Static method](https://developer.mozilla.org/en-US/docs/Glossary/Static_method) - [Static site generator (*SSG*)](https://developer.mozilla.org/en-US/docs/Glossary/SSG) - [Static typing](https://developer.mozilla.org/en-US/docs/Glossary/Static_typing) - [Sticky activation](https://developer.mozilla.org/en-US/docs/Glossary/Sticky_activation) - [Strict mode](https://developer.mozilla.org/en-US/docs/Glossary/Strict_mode) - [String](https://developer.mozilla.org/en-US/docs/Glossary/String) - [Stringifier](https://developer.mozilla.org/en-US/docs/Glossary/Stringifier) - [STUN](https://developer.mozilla.org/en-US/docs/Glossary/STUN) - [Style origin](https://developer.mozilla.org/en-US/docs/Glossary/Style_origin) - [Stylesheet](https://developer.mozilla.org/en-US/docs/Glossary/Stylesheet) - [Submit button](https://developer.mozilla.org/en-US/docs/Glossary/Submit_button) - [SVG](https://developer.mozilla.org/en-US/docs/Glossary/SVG) - [SVN](https://developer.mozilla.org/en-US/docs/Glossary/SVN) - [Symbol](https://developer.mozilla.org/en-US/docs/Glossary/Symbol) - [Symmetric-key cryptography](https://developer.mozilla.org/en-US/docs/Glossary/Symmetric-key_cryptography) - [Synchronous](https://developer.mozilla.org/en-US/docs/Glossary/Synchronous) - [Syntax](https://developer.mozilla.org/en-US/docs/Glossary/Syntax) - [Syntax error](https://developer.mozilla.org/en-US/docs/Glossary/Syntax_error) - [Synthetic monitoring](https://developer.mozilla.org/en-US/docs/Glossary/Synthetic_monitoring) - [Table grid box](https://developer.mozilla.org/en-US/docs/Glossary/Table_grid_box) - [Table wrapper box](https://developer.mozilla.org/en-US/docs/Glossary/Table_wrapper_box) - [Tag](https://developer.mozilla.org/en-US/docs/Glossary/Tag) - [TCP](https://developer.mozilla.org/en-US/docs/Glossary/TCP) - [TCP handshake](https://developer.mozilla.org/en-US/docs/Glossary/TCP_handshake) - [TCP slow start](https://developer.mozilla.org/en-US/docs/Glossary/TCP_slow_start) - [Telnet](https://developer.mozilla.org/en-US/docs/Glossary/Telnet) - [Texel](https://developer.mozilla.org/en-US/docs/Glossary/Texel) - [The Khronos Group](https://developer.mozilla.org/en-US/docs/Glossary/The_Khronos_Group) - [Thread](https://developer.mozilla.org/en-US/docs/Glossary/Thread) - [Three js](https://developer.mozilla.org/en-US/docs/Glossary/Three_js) - [Throttle](https://developer.mozilla.org/en-US/docs/Glossary/Throttle) - [Time to First Byte (*TTFB*)](https://developer.mozilla.org/en-US/docs/Glossary/Time_to_first_byte) - [Time to Interactive (*TTI*)](https://developer.mozilla.org/en-US/docs/Glossary/Time_to_interactive) - [TLD](https://developer.mozilla.org/en-US/docs/Glossary/TLD) - [TOFU](https://developer.mozilla.org/en-US/docs/Glossary/TOFU) - [Top layer](https://developer.mozilla.org/en-US/docs/Glossary/Top_layer) - [Transient activation](https://developer.mozilla.org/en-US/docs/Glossary/Transient_activation) - [Transport Layer Security (*TLS*)](https://developer.mozilla.org/en-US/docs/Glossary/TLS) - [Tree shaking](https://developer.mozilla.org/en-US/docs/Glossary/Tree_shaking) - [Trident](https://developer.mozilla.org/en-US/docs/Glossary/Trident) - [Truthy](https://developer.mozilla.org/en-US/docs/Glossary/Truthy) - [TTL](https://developer.mozilla.org/en-US/docs/Glossary/TTL) - [TURN](https://developer.mozilla.org/en-US/docs/Glossary/TURN) - [Type](https://developer.mozilla.org/en-US/docs/Glossary/Type) - [Type coercion](https://developer.mozilla.org/en-US/docs/Glossary/Type_coercion) - [Type conversion](https://developer.mozilla.org/en-US/docs/Glossary/Type_conversion) - [TypeScript](https://developer.mozilla.org/en-US/docs/Glossary/TypeScript) - [UAAG](https://developer.mozilla.org/en-US/docs/Glossary/UAAG) - [UDP (*User Datagram Protocol*)](https://developer.mozilla.org/en-US/docs/Glossary/UDP) - [UI](https://developer.mozilla.org/en-US/docs/Glossary/UI) - [Undefined](https://developer.mozilla.org/en-US/docs/Glossary/Undefined) - [Unicode](https://developer.mozilla.org/en-US/docs/Glossary/Unicode) - [Unix time](https://developer.mozilla.org/en-US/docs/Glossary/Unix_time) - [URI](https://developer.mozilla.org/en-US/docs/Glossary/URI) - [URL](https://developer.mozilla.org/en-US/docs/Glossary/URL) - [URN](https://developer.mozilla.org/en-US/docs/Glossary/URN) - [Usenet](https://developer.mozilla.org/en-US/docs/Glossary/Usenet) - [User agent](https://developer.mozilla.org/en-US/docs/Glossary/User_agent) - [UTF-8](https://developer.mozilla.org/en-US/docs/Glossary/UTF-8) - [UTF-16](https://developer.mozilla.org/en-US/docs/Glossary/UTF-16) - [UUID](https://developer.mozilla.org/en-US/docs/Glossary/UUID) - [UX](https://developer.mozilla.org/en-US/docs/Glossary/UX) - [Validator](https://developer.mozilla.org/en-US/docs/Glossary/Validator) - [Value](https://developer.mozilla.org/en-US/docs/Glossary/Value) - [Variable](https://developer.mozilla.org/en-US/docs/Glossary/Variable) - [Vendor prefix](https://developer.mozilla.org/en-US/docs/Glossary/Vendor_prefix) - [Viewport](https://developer.mozilla.org/en-US/docs/Glossary/Viewport) - [Visual viewport](https://developer.mozilla.org/en-US/docs/Glossary/Visual_viewport) - [Void element](https://developer.mozilla.org/en-US/docs/Glossary/Void_element) - [VoIP](https://developer.mozilla.org/en-US/docs/Glossary/VoIP) - [W3C](https://developer.mozilla.org/en-US/docs/Glossary/W3C) - [WAI](https://developer.mozilla.org/en-US/docs/Glossary/WAI) - [WCAG](https://developer.mozilla.org/en-US/docs/Glossary/WCAG) - [Web performance](https://developer.mozilla.org/en-US/docs/Glossary/Web_performance) - [Web server](https://developer.mozilla.org/en-US/docs/Glossary/Web_server) - [Web standards](https://developer.mozilla.org/en-US/docs/Glossary/Web_standards) - [WebAssembly](https://developer.mozilla.org/en-US/docs/Glossary/WebAssembly) - [WebDAV](https://developer.mozilla.org/en-US/docs/Glossary/WebDAV) - [WebExtensions](https://developer.mozilla.org/en-US/docs/Glossary/WebExtensions) - [WebGL](https://developer.mozilla.org/en-US/docs/Glossary/WebGL) - [WebIDL](https://developer.mozilla.org/en-US/docs/Glossary/WebIDL) - [WebKit](https://developer.mozilla.org/en-US/docs/Glossary/WebKit) - [WebM](https://developer.mozilla.org/en-US/docs/Glossary/WebM) - [WebP](https://developer.mozilla.org/en-US/docs/Glossary/WebP) - [WebRTC](https://developer.mozilla.org/en-US/docs/Glossary/WebRTC) - [WebSockets](https://developer.mozilla.org/en-US/docs/Glossary/WebSockets) - [WebVTT](https://developer.mozilla.org/en-US/docs/Glossary/WebVTT) - [WHATWG](https://developer.mozilla.org/en-US/docs/Glossary/WHATWG) - [Whitespace](https://developer.mozilla.org/en-US/docs/Glossary/Whitespace) - [WindowProxy](https://developer.mozilla.org/en-US/docs/Glossary/WindowProxy) - [World Wide Web](https://developer.mozilla.org/en-US/docs/Glossary/World_Wide_Web) - [Wrapper](https://developer.mozilla.org/en-US/docs/Glossary/Wrapper) - [XFormsDeprecated](https://developer.mozilla.org/en-US/docs/Glossary/XFormsDeprecated) - [XHTML](https://developer.mozilla.org/en-US/docs/Glossary/XHTML) - [XInclude](https://developer.mozilla.org/en-US/docs/Glossary/XInclude) - [XLink](https://developer.mozilla.org/en-US/docs/Glossary/XLink) - [XML](https://developer.mozilla.org/en-US/docs/Glossary/XML) - [XMLHttpRequest (*XHR*)](https://developer.mozilla.org/en-US/docs/Glossary/XMLHttpRequest_(XHR)) - [XPath](https://developer.mozilla.org/en-US/docs/Glossary/XPath) - [XQuery](https://developer.mozilla.org/en-US/docs/Glossary/XQuery) - [XSLT](https://developer.mozilla.org/en-US/docs/Glossary/XSLT) - [Zstandard compression](https://developer.mozilla.org/en-US/docs/Glossary/Zstandard_compression)