Object.values()
方法返回一个给定对象自身的所有可枚举属性值的数组,值的顺序与使用for...in
循环的顺序相同 ( 区别在于 for-in 循环枚举原型链中的属性 )。
语法
Object.values(obj)
参数
-
obj
- 被返回可枚举属性值的对象。
返回值
一个包含对象自身的所有可枚举属性值的数组。
描述
Object.values()
返回一个数组,其元素是在对象上找到的可枚举属性值。属性的顺序与通过手动循环对象的属性值所给出的顺序相同。
示例
var obj = { foo: 'bar', baz: 42 }; console.log(Object.values(obj)); // ['bar', 42] // array like object var obj = { 0: 'a', 1: 'b', 2: 'c' }; console.log(Object.values(obj)); // ['a', 'b', 'c'] // array like object with random key ordering // when we use numeric keys, the value returned in a numerical order according to the keys var an_obj = { 100: 'a', 2: 'b', 7: 'c' }; console.log(Object.values(an_obj)); // ['b', 'c', 'a'] // getFoo is property which isn't enumerable var my_obj = Object.create({}, { getFoo: { value: function() { return this.foo; } } }); my_obj.foo = 'bar'; console.log(Object.values(my_obj)); // ['bar'] // non-object argument will be coerced to an object console.log(Object.values('foo')); // ['f', 'o', 'o']
Polyfill
如果要 Object.values
兼容不支持它的旧环境,可在 tc39/proposal-object-values-entries 或 es-shims/Object.values 中找到 Polyfill 。
根据Object.keys()的Polyfill仿写一个:
if (!Object.values) Object.values = function(obj) { if (obj !== Object(obj)) throw new TypeError('Object.values called on a non-object'); var val=[],key; for (key in obj) { if (Object.prototype.hasOwnProperty.call(obj,key)) { val.push(obj[key]); } } return val; }
规范
Specification | Status | Comment |
---|---|---|
ECMAScript Latest Draft (ECMA-262) Object.values |
Draft | Initial definition. |
ECMAScript 2017 (ECMA-262) Object.values |
Standard |
浏览器兼容
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out
https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
Desktop | Mobile | Server | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
values |
Chrome Full support 54 | Edge Full support 14 | Firefox Full support 47 | IE No support No | Opera Full support 41 | Safari Full support 10.1 | WebView Android Full support 54 | Chrome Android Full support 54 | Firefox Android Full support 47 | Opera Android Full support 41 | Safari iOS Full support 10.3 | Samsung Internet Android Full support 6.0 | nodejs Full support 7.0.0
|
Legend
- Full support
- Full support
- No support
- No support
- User must explicitly enable this feature.
- User must explicitly enable this feature.