The Web platform: Browser technologies

Core platform

HTML ⓤ ⓣ

DOM ⓣ

ECMAScript ⓣ

WebAssembly

URL ⓣ

Fetch (includes CORS) ⓤ ⓤ ⓣ ⓣ ⚑ ⚑

XMLHttpRequest ⓤ ⓜ ⓣ ⓣ

Encoding ⓣ

CSS features

CSS roadmap ⓤ ⓣ

Animations ⓤ ⓜ ⓣ ❢

Background-image options ⓤ ⚑

Border images ⓤ ⓜ ⚑

Border radius (rounded corners) ⓤ ⓜ ⚑

Box shadows ⓤ ⓜ ❢

Box sizing ⓤ ⓜ ⚑

Cascading and inheritance ⓜ

Colors ⓤ ⓜ ⓣ

Compositing and Blending ⓤ ⓣ

Containment ⓤ ⓜ

Device Adaptation ⓤ

Downloadable fonts (@font-face) ⓤ ⓜ ⓣ ⚑

Exclusions ⓤ ⓣ

Feature queries (@supports) ⓤ ⓜ ⓣ

Filter Effects ⓤ ⓣ

Fixed positioning (position:fixed) ⓤ ⓜ ⚑

Flexible box layout (Flexbox) ⓤ ⓜ ⓣ ⚑

Font-feature settings ⓤ ⓜ ⚑

Font loading ⓤ ⓜ

Gradients ⓤ ⓜ ⚑

Grid layout ⓤ ⓣ ⚑

Hyphenation ⓤ ⓜ ⚑

Image Values and Replaced Content ⓣ

Logical properties ⓤ

Masking ⓤ ⓣ

Media Queries ⓤ ⓜ ⓣ ⚑

Motion paths

Multiple-column layout ⓤ ⓜ ⓣ ⚑

Multiple backgrounds ⓤ ⓜ ⚑

Opacity ⓤ ⓜ ⚑

Overflow

Pointer events ⓤ ⓜ ⚑

Pseudo-elements ⓜ ⓣ

Scroll Snap Points ⓤ

Selectors ⓤ ⓜ ⚑

Shapes ⓤ ⓣ

Sticky positioning (position:sticky) ⓤ ⓜ ❢

Style attributes ⓣ

Syntax ⓣ

Text decoration ⓤ ⓜ ⓣ

Text overflow ⓤ ⓜ ⚑

Text shadows ⓤ ⓜ ⚑

Transforms (2D) ⓤ ⓜ ⓣ ⚑

Transforms (3D) ⓤ ⓜ ⓣ ⚑

Transitions ⓤ ⓜ ⓣ ⚑

Values and Units ⓜ ⓣ

Will Change ⓤ ⓜ

Writing modes ⓣ

CSSOM (CSS Object Model) ⓣ

CSSOM View Module ⓣ

Graphics and typography

Canvas ⓤ ⓣ ⚑

WebGL ⓤ ❢

SVG ⓤ ⓣ ⚑

WOFF ⓤ ⚑

MathML ⓤ ⓜ ⓣ

Web Animations ⓤ ⓜ ⓣ

Media

Web Audio API ⓣ

WebVTT ⓣ

Media Source Extensions ⓣ

Media Fragments

Platform interaction, events, messaging

Notifications API ⓤ ⓣ

Cross-document messaging ⓤ ⓜ ⓣ ⚑

Channel messaging

Fullscreen API ⓤ ⓜ

Geolocation ⓤ ⓣ ⚑

Device Orientation ⓤ ⓣ

Screen Orientation ⓤ ⓜ ⓣ

UI Events (formerly DOM Events) ⓣ

Pointer Events ⓤ ⓣ

Touch Events ⓤ ⓣ

Pointer Lock ⓜ ⓣ

Gamepad ⓜ ⓣ

getUserMedia ⓤ ⓣ

Battery Status ⓜ ⓣ

Vibration ⓜ ⓣ

Beacon

HTML Media Capture (the capture attribute) ⓣ

Clipboard API and events

Storage and Files

Storage (NavigatorStorage+StorageManager)

Web Storage (localStorage) ⓤ ⓜ ⓣ ❢

Indexed Database ⓤ ⓣ ❢

File API ⓤ ⓜ ⓣ ⚑

Blob URLs ⓤ ⓜ ⓣ ⓣ

File Reader ⓤ ⓜ ⓣ

File and Directory Entries API

Real-time communication

WebRTC ⓣ

WebSocket protocol

WebSocket API ⓤ ⓣ ❢

Server-Sent Events ⓤ ⓣ ⚑

Push API ⓜ

Web Components

Custom Elements ⓣ

Shadow DOM ⓣ

Templates

HTML bonus features

classList (DOMTokenList) ⓤ ⓜ ⓜ ⓣ ⚑

dataset (data-* attributes) ⓤ ⓣ ⚑

async for scripts ⓤ ⓜ ⓣ

defer for scripts ⓤ ⓜ

Session-history management ⓤ ⓜ ⓣ ⚑

hashchange ⓤ ⓜ ⚑

Sandboxed iframe ⓤ ⓜ ⓣ

Drag and drop ⓤ ⓣ ❢

contentEditable ⓤ ⓣ

ARIA ⓤ

Performance optimization and analysis

Web Workers ⓤ ⓜ ⓣ ⚑

Shared Workers ⓤ

Timing control for script-based animations ⓤ ⚑

Navigation Timing ⓤ ⓜ ⓣ

Page Visibility ⓣ

User Timing ⓣ

Performance Timeline ⓣ

High Resolution Time ⓣ

SIMD (Single instruction, multiple data)

Security and privacy

Content Security Policy (CSP) ⓣ

Upgrade Insecure Requests

Web Cryptography API ⓣ

Referrer policy ⓤ ⓣ

Tracking Preference Expression (DNT)

Web Authentication ⓜ

Other core-platform bonus features

Structured cloning ⓜ

Transferable objects ⓜ

Mutation observers

Streams

DOM Parsing and Serialization ⓣ

DOM XPath ⓣ

Quirks Mode ⓣ

Internationalization API ⓤ ⓜ ⓣ

Promises

JSON parsing ⓤ ⓜ ⚑

Typed Array ⓤ ⓜ

Service Workers ⓣ

Intersection Observer

querySelector() method ⓤ

matches() method ⓤ

matchMedia() method ⓤ ⓜ ⚑

data URLs ⓤ ⓣ

Foundations

HTTP

HTTP/2 ⓣ

TLS

Cookies

Origin ⓜ

Unicode

MIME Sniffing

Various other

Web IDL ⓣ

Link header

Content-Disposition header

A feature history of the modern Web Platform