Map.prototype.entries()

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()

返回值

一个新的 Map 迭代器对象.

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 Latest Draft (ECMA-262)
Map.prototype.entries
Draft
ECMAScript 2015 (6th Edition, ECMA-262)
Map.prototype.entries
Standard Initial definition.

浏览器兼容性

Update compatibility data on GitHub
DesktopMobileServer
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
entriesChrome Full support 38Edge Full support 12Firefox Full support 20IE No support NoOpera Full support 25Safari Full support 8WebView Android Full support 38Chrome Android Full support 38Firefox Android Full support 20Opera Android Full support 25Safari iOS Full support 8Samsung Internet Android Full support Yesnodejs Full support 0.12

Legend

Full support  
Full support
No support  
No support

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