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
Desktop Mobile Server
Chrome Edge Firefox Internet Explorer Opera Safari Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet Node.js
entries Chrome Full support 38 Edge Full support 12 Firefox Full support 20 IE No support No Opera Full support 25 Safari Full support 8 WebView Android Full support 38 Chrome Android Full support 38 Firefox Android Full support 20 Opera Android Full support 25 Safari iOS Full support 8 Samsung Internet Android Full support 3.0 nodejs Full support 0.12

Legend

Full support  
Full support
No support  
No support

相关链接

  1. JavaScript 标准库
  2. Map
  3. 属性
    1. Map.prototype
    2. Map.prototype.size
    3. Map.prototype[@@toStringTag]
    4. get Map[@@species]
  4. 方法
    1. Map.prototype.clear()
    2. Map.prototype.delete()
    3. Map.prototype.entries()
    4. Map.prototype.forEach()
    5. Map.prototype.get()
    6. Map.prototype.has()
    7. Map.prototype.keys()
    8. Map.prototype.set()
    9. Map.prototype.values()
    10. Map.prototype[@@iterator]()
  5. 继承
  6. Function
  7. 属性
    1. Function.arguments
    2. Function.arity
    3. Function.caller
    4. Function.displayName
    5. Function.length
    6. Function.name
    7. Function.prototype
  8. 方法
    1. Function.prototype.apply()
    2. Function.prototype.bind()
    3. Function.prototype.call()
    4. Function.prototype.isGenerator()
    5. Function.prototype.toSource()
    6. Function.prototype.toString()
  9. Object
  10. 属性
    1. Object.prototype.__count__
    2. Object.prototype.__noSuchMethod__
    3. Object.prototype.__parent__
    4. Object.prototype.__proto__
    5. Object.prototype.constructor
  11. 方法
    1. Object.prototype.__defineGetter__()
    2. Object.prototype.__defineSetter__()
    3. Object.prototype.__lookupGetter__()
    4. Object.prototype.__lookupSetter__()
    5. Object.prototype.hasOwnProperty()
    6. Object.prototype.isPrototypeOf()
    7. Object.prototype.propertyIsEnumerable()
    8. Object.prototype.toLocaleString()
    9. Object.prototype.toSource()
    10. Object.prototype.toString()
    11. Object.prototype.unwatch()
    12. Object.prototype.valueOf()
    13. Object.prototype.watch()
    14. Object.setPrototypeOf()