2021 state of js

特性

语言

• Promise.any
• Logical Assignment (&&=)
• Private Fields
• Nullish Coalescing
• Numeric Separator
• String.prototype.replaceAll
• Proxies
• Promise.allSettled
• String.prototype.matchAll
• Optional Chaining
• Dynamic Import
• BigInt
• Top Level Await
• Array.prototype.at

浏览器接口

• Geolocation
• Web Share API
• Shadow DOM
• WebRTC
• WebGL
• WebSocket
• Custom Elements
• Service Workers
• Intl
• Page Visibility API
• Web Animations
• Web Audio
• Web Speech API
• Broadcast Channel API
• File System API
• WebXR Device API

其他

• Progressive Web Apps
• WebAssembly WASM