[@@iterator]()
方法返回一个新的Iterator对象,它遍历字符串的代码点,返回每一个代码点的字符串值。
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语法
string[Symbol.iterator]
返回值
一个新的Iterator对象。
示例
使用[@@iterator]()
var string = 'A\uD835\uDC68'; var strIter = string[Symbol.iterator](); console.log(strIter.next().value); // "A" console.log(strIter.next().value); // "\uD835\uDC68"
通过
for..of 使用[@@iterator]()
var string = 'A\uD835\uDC68B\uD835\uDC69C\uD835\uDC6A'; for (var v of string) { console.log(v); } // "A" // "\uD835\uDC68" // "B" // "\uD835\uDC69" // "C" // "\uD835\uDC6A"
规范
Specification | Status | Comment |
---|---|---|
ECMAScript 2015 (6th Edition, ECMA-262) String.prototype[@@iterator]() |
Standard | Initial definition. |
ECMAScript Latest Draft (ECMA-262) String.prototype[@@iterator]() |
Draft |
浏览器兼容性
We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains.
Find out how you can help!
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
基本支持 | (Yes) | 36 (36) [1] | 未实现 | 未实现 | 未实现 |
Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
基本支持 | 未实现 | (Yes) | 36.0 (36) [1] | 未实现 | 未实现 | 未实现 |
[1] From Gecko 17 (Firefox 17 / Thunderbird 17 / SeaMonkey 2.14) to Gecko 26 (Firefox 26 / Thunderbird 26 / SeaMonkey 2.23 / Firefox OS 1.2) the iterator
property was used (bug 907077), and from Gecko 27 to Gecko 35 the "@@iterator"
placeholder was used. In Gecko 36 (Firefox 36 / Thunderbird 36 / SeaMonkey 2.33), the @@iterator
symbol got implemented (bug 918828).