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Map.prototype.entries()

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该新特性属于 ECMAScript 2015(ES6)规范,在使用时请注意浏览器兼容性。

entries() 方法返回一个新的包含 [key, value] 对的 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()

示例

entries() 的使用

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)
Map.prototype.entries
Standard Initial definition.

浏览器兼容性

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 38 20 (20) 未实现 25 7.1
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support 未实现 38 20.0 (20) 未实现 未实现 8

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