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 | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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