Web API

Access and manipulate the DOM tree

Since 1998

Element

Base class for all elements

Since 1998

IntersectionObserver

Detect element visibility

Since 2019

MutationObserver

Watch for DOM changes

Since 2012

ResizeObserver

Observe element size changes

Since 2020

PerformanceObserver

Monitor performance metrics

Since 2017

Storage & Data

localStorage

Persistent key-value storage

Since 2009

sessionStorage

Session-scoped storage

Since 2009

IndexedDB

98%

Client-side database

Since 2015

Cache API

HTTP cache management

Since 2017

Cookie Store API

87%

Asynchronous cookie access

Since 2021

Graphics & Animation

Canvas 2D

2D drawing and graphics

Since 2005

SVG

Scalable vector graphics

Since 2001

WebGL

98%

3D graphics rendering

Since 2011

OffscreenCanvas

89%

Canvas rendering in workers

Since 2018

Workers & Threading

Performance API

Measure web performance

Since 2012

Web Workers

Background JavaScript execution

Since 2012

Service Worker

Offline-first web apps

Since 2017

SharedArrayBuffer

92%

Shared memory for workers

Since 2017

User Interaction

Drag and Drop API

Native drag and drop

Since 2010

Page Visibility API

Detect page visibility

Since 2013

Fullscreen API

Enter fullscreen mode

Since 2014

Clipboard API

Access system clipboard

Since 2020

Pointer Lock API

Lock mouse cursor

Since 2013

Web Share API

89%

Native sharing

Since 2019

File & System

File API

Read and manipulate files

Since 2011

File and Directory Entries

92%

Navigate file system

Since 2016

File System Access API

86%

Access local file system

Since 2020

Other

History API

Browser history manipulation

Since 2010

URL API

Parse and construct URLs

Since 2015

Web Components

Custom HTML elements

Since 2019

Notification API

Display system notifications

Since 2015

Network & Communication

Fetch API

98%

Modern HTTP requests

Since 2015

WebSocket

Real-time bidirectional communication

Since 2011

Server-Sent Events

Server push notifications

Since 2012

Broadcast Channel API

Communication between browsing contexts

Since 2016

WebRTC

Real-time peer-to-peer communication

Since 2017

Media & Audio

Web Audio API

Advanced audio processing

Since 2014

Media Source Extensions

Adaptive streaming support

Since 2016

Media Devices

Access cameras and microphones

Since 2016

Screen Capture API

94%

Capture screen content

Since 2018

Picture-in-Picture

93%

Floating video window

Since 2020

Device & Sensors

Geolocation API

Access device location

Since 2010

Device Orientation

94%

Detect device rotation

Since 2011

Vibration API

82%

Control device vibration

Since 2014

Battery Status API

76%

Monitor battery level

Since 2016

Ambient Light Sensor

68%

Detect ambient light level

Since 2019

Security & Crypto

Web Crypto API

Cryptographic operations

Since 2017

Permissions API

94%

Query permission status

Since 2017

Web Authentication API

93%

WebAuthn for passwordless auth

Since 2019

Credential Management

89%

Password and credential storage

Since 2019

Modern Web Platform

Web Animations API