ECMAScript 6得到了Mozilla的支持

2013-5-28 10:06| 发布者: joejoe0332| 查看: 766| 评论: 0|原作者: 开源中国社区|来自: 开源中国社区

摘要: 　　ECMAScript 6 是下一个版本标准，标准草案已经在官方 wiki 中公布。如果你想发送反馈意见，可以访问 es-discuss. 　　TC39 共识标注为三个不同级别 Consensus 共识 Ongoing Discussion 讨论中 Controversial ...

　　ECMAScript 6 是下一个版本标准，标准草案已经在官方 wiki 中公布。如果你想发送反馈意见，可以访问 es-discuss.

　　TC39 共识标注为三个不同级别

Consensus 共识

Ongoing Discussion 讨论中

Controversial 争议

　　这三个级别的意思是：

　　Firefox 已经支持的特性

Feature	Version	Comment
`const`	?	Not compliant with the current specification: scoped like var not let
`let` (global scope)	?	Not compliant with the current specification
`let` (local scope)	?	Not compliant with the current specification
Destructuring assignment	JS 1.7	Not compliant with the current specification
`for...of` statement	New in Firefox 13
Iterators and generators	?	Not compliant with the current specification
Rest parameters	New in Firefox 15
Default parameters	New in Firefox 15
Spread operator of Array	New in Firefox 16
Arrow functions	New in Firefox 22

Feature	Version	Comment
`Map`	New in Firefox 13	A new type of collections
`Map` Iteration	New in Firefox 17	Iterable in for-of
`Map methods`		forEach, entries, keys, values
`Set`	New in Firefox 13	A new type of collections
`Set` Iteration	New in Firefox 17	Iterable in for-of
`Set methods`		forEach, entries, keys, values
`Array` Iteration	New in Firefox 13	Iterable in for-of
`WeakMap`	New in Firefox 6	A new type of collections
`weakmap.clear()`	New in Firefox 20
`Proxy`	New in Firefox 18
`RegExp` sticky (`y`) flag	?
`Number.isNaN()`	New in Firefox 16
`Number.isFinite()`	New in Firefox 16
`Number.toInteger()`	New in Firefox 16
`Number.isInteger()`	New in Firefox 16
`string.startsWith()`	New in Firefox 17
`string.endsWith()`	New in Firefox 17
`string.contains()`	New in Firefox 17
`string.repeat()`	New in Firefox 24
Object.is
Math.imul	New in Firefox 20	C-like 32-bit integer multiplication