学习一个新术语：
- 语义
- 在程序中, 语义 指的是一段代码的含义 — 例如 "运行这行代码会产生怎样的影响?", 或者 "这个HTML的元素有什么作用，扮演了什么样的角色" (不只是 "它看上去像是什么?"。)
Web 技术文档和代码中含有大量的术语和缩写。本术语表给出了可以帮助你正确理解并运用于 Web 开发所需要的名词与缩写，以及它们的定义。
A
- Accessibility
- Accessibility tree (AOM)
- Adobe Flash
- AJAX
- Alignment container
- Alignment subject
- ALPN
- API
- Apple Safari
- Application Context
- Argument
- ARIA
- ARPA
- Arpanet
- Array
- ASCII
- ATAG
- Attribute
B
- Baseline
- beacon
- Bézier curve
- BiDi
- BigInt
- Blink
- Block
- Block (scripting)
- Block cipher mode of operation
- Boolean
- Boot2Gecko
- Bounding Box
- Breadcrumb
- Brotli
- Browsing context
C
- Cache
- Cacheable
- CalDAV
- Canonical order
- Canvas
- Card sorting
- CardDAV
- caret
- CDN
- Certificate authority
- Certified
- Challenge-response authentication
- Character
- Character set
- Chrome
- Chrome 浏览器
- CIA
- Cipher
- Cipher suite
- Ciphertext
- Class
- Client hints
- Closure
- CMS
- Code splitting
- Codec
- Computer Programming
- Conditional
- Constant
- Constructor
- Continuous Media
- Cookie
- Copyleft
- CORS
- CORS-safelisted request header
- CORS-safelisted response header
- Crawler
- CRLF
- Cross Axis
- CRUD
- Cryptanalysis
- Cryptographic hash function
- Cryptography
- CSP
- CSRF
- CSS
- CSS Object Model (CSSOM)
- CSS pixel
- CSS 预处理器
D
- Decryption
- Denial of Service
- Descriptor (解释器) (CSS)
- Deserialization
- DHTML
- Digest
- Distributed Denial of Service
- DMZ
- DNS
- Document directive
- document environment
- DOM
- Domain sharding
- Dominator
- DoS attack
- DTLS (Datagram Transport Layer Security)
- DTMF (Dual-Tone Multi-Frequency signaling)
- Dynamic typing
E
- ECMA
- ECMAScript
- Effective connection type
- Encapsulation
- Encryption
- Endianness（字节序）
- Engine
- Entity
- Entity header
- Event
- Exception
- Expando
F
- Fallback alignment
- Falsy
- Fetch 指令
- Firefox OS
- firewall
- First contentful paint
- First CPU idle
- First input delay
- First interactive
- First Meaningful Paint
- First paint
- Flex Item
- Flexbox
- Forbidden response header name
- Fork
- Fragmentainer
- frame rate (FPS)
- FTP
- FTU
- Function（函数）
- Fuzz testing
G
- Gaia
- Garbage collection
- Gecko
- GIF
- GIJ
- Git
- Global object
- Global scope
- Global variable
- Glyph
- Gonk
- GPL
- GPU
- Grid
- Grid Areas
- Grid Axis
- Grid Cell
- Grid Column
- Grid container
- Grid Lines
- Grid Row
- Grid Tracks
- Guard
- Gutters
- Gzip 压缩
H
- Head
- High-level programming language
- Host
- Hotlink
- Houdini
- HPKP
- HSTS
- HTML
- HTML5
- HTTP
- HTTP/2
- HTTPS
- Hypertext
I
- I18N
- IANA
- ICANN
- ICE
- IDE
- IDL
- IETF
- IIFE（立即调用函数表达式）
- IMAP
- Immutable
- Index
- IndexedDB
- Information architecture
- Inheritance
- Input method editor
- Instance
- Internationalization
- Internet
- Intrinsic Size
- IP Address
- IPv4
- IPv6
- IRC
- ISO
- ISP
- ITU
J
K
L
- Latency
- Lazy load
- LGPL
- Ligature
- Local scope
- Local variable
- Locale
- Long task
- Loop
- Lossless compression
- lossy compression
- LTR (Left To Right)
M
- Main Axis
- Main thread
- markup
- MathML
- Media
- Media (Audio-visual presentation)
- Media (CSS)
- Metadata
- Method
- Microsoft Edge
- Microsoft Internet Explorer
- Middleware
- mime
- MIME type
- minification
- Mixin
- Mobile First
- Modem
- Modern web apps
- Modularity
- Mozilla Firefox
- Mutable
- MVC
N
- Namespace
- NaN
- NAT
- Native
- Navigation directive
- Netscape Navigator
- Network throttling
- NNTP
- Node
- Node (networking)
- Node.js
- non-normative
- Normative
- Null
- Number
O
P
- P2P
- PAC
- Packet
- Page load time
- Page prediction
- Parameter
- Parent object
- Parse
- Parser
- Perceived performance
- Percent-encoding
- PHP
- Pixel
- Placeholder names
- Plaintext
- PNG
- Polyfill
- Polymorphism
- POP3
- Port
- Prefetch
- Preflight request
- prerender
- Presto
- Privileged
- privileged code
- Progressive web apps
- Promise
- Property
- Property (CSS)
- Property (JavaScript)
- Prototype
- Pseudo-class
- Pseudo-element
- Pseudocode
- Public-key cryptography
- Python
Q
R
- RAIL
- Random Number Generator
- Raptor
- Raster image
- RDF
- Real User Monitoring (RUM)
- Reference
- Regular expression
- Rendering engine
- Repo
- Reporting directive
- Resource Timing
- Response header
- Responsive web design
- REST
- RGB
- RIL
- Robots.txt
- Round Trip Time (RTT)
- routers
- RSS
- RTCP (RTP Control Protocol)
- RTF
- RTL (Right to Left)
- RTP (Real-time Transport Protocol) and SRTP (Secure RTP)
- RTSP: Real-time streaming protocol
- Ruby
S
- Same-origin policy
- SCM
- Screen reader
- Script-supporting element
- Scroll container
- Scrollport
- SCTP
- SDP
- Search engine
- Second-level Domain
- Secure Sockets Layer (SSL)
- Selector (CSS)
- Self-Executing Anonymous Function
- SEO
- Serialization
- Server Timing
- Session Hijacking
- SGML
- Shadow tree
- Shim
- SIMD
- Simple response header
- SISD
- Site
- Site map
- SLD
- Slug
- Smoke Test
- SMPTE (Society of Motion Picture and Television Engineers)
- SMTP
- Snap positions
- SOAP
- SPA
- Specification
- Speed index
- SQL
- SQL Injection
- SRI
- Stacking context
- State machine
- Statement
- Static method
- Static typing
- String
- STUN
- Style origin
- SVG
- SVN
- Symbol
- Symmetric-key cryptography
- Syntax
- Syntax error(语法错误)
- Synthetic monitoring
T
- Tag
- TCP
- TCP handshake
- TCP slow start
- Telnet
- Texel
- Thread
- Three js
- Time to first byte
- Time to interactive
- TLD
- TLS
- TOFU
- Transmission Control Protocol (TCP)
- Tratando Formulários com PHP
- Tree shaking
- Trident
- Truthy（真值）
- TTL
- TURN
- Type coercion
- Type conversion（类型转换）
U
V
W
- W3C
- WAI
- WCAG
- Web performance
- Web server
- Web standards
- WebDAV
- WebExtensions
- WebGL
- WebIDL
- WebKit
- WebM
- WebP
- WebRTC
- WebSockets
- WebVTT
- WHATWG
- Whitespace
- World Wide Web
- Wrapper
X
严
中
代
优
伸
作
元
函
动
协
原
变
同
回
块
域
头
字
安
密
对
带
幂
开
异
抽
控
散
数
文
服
本
标
正
浏
渐
用
禁
空
签
简
算
类
缓
编
节
语
请
调
超
跨
递
通
首
Other
为本表作贡献
由于中文术语表目前（同英文版一样）使用首字符排序，标题中每一个不同的首字符都会产生一个子索引（而不是首字母排序，仅使用 26 个首字母与单独一个“其他”分类），建议暂时使用类似 Endianness（字节序）的形式来翻译文章标题，以保证本索引的可读性。
编辑术语表是一项永无止境的工作，你可以添加新的条目或改进、完善现有条目。现在就点击下面的按钮或者选择一项来开始吧。
如果你想要了解更多关于如何对该术语表做贡献的相关信息，请访问术语表文档状态页面。