map.entries
entries()方法返回一个新的包含 [key, value]的 Iterator对象，返回的迭代器的迭代顺序与 Map对象的插入顺序相同。
语法
myMap.entries()返回值
一个新的Map迭代器对象。
示例
使用 entries()
var myMap = new Map();
myMap.set('0', 'foo');
myMap.set(1, 'bar');
myMap.set({}, 'baz');
var mapIter = myMap.entries();
console.log(mapIter.next().value); // ["0", "foo"]
console.log(mapIter.next().value); // [1, "bar"]
console.log(mapIter.next().value); // [Object, "baz"]规范
Specification | Status | Comment |
|---|---|---|
ECMAScript 2015 (6th Edition, ECMA-262)The definition of 'Map.prototype.entries' in that specification. | Standard | Initial definition. |
ECMAScript Latest Draft (ECMA-262)The definition of 'Map.prototype.entries' in that specification. | Living Standard | |
浏览器兼容性
Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
Basic support | 38 | (Yes) | 20 (20) | No support | 25 | 7.1 |
Feature | Android | Chrome for Android | Edge | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|---|
Basic support | No support | 38 | (Yes) | 20.0 (20) | No support | No support | 8 |
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