string.@@iterator

[@@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。

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)The definition of 'String.prototype@@iterator' in that specification.	Standard	Initial definition.
ECMAScript Latest Draft (ECMA-262)The definition of 'String.prototype@@iterator' in that specification.	Draft

浏览器兼容性

Feature	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic Support	(Yes)	?	17 — 27 (as iterator) 27 — 36 (as @@iterator)1 362	No	No	No

Feature	Android	Chrome for Android	Edge mobile	Firefox for Android	IE mobile	Opera Android	iOS Safari
Basic Support	No	No	?	36	No	No	No