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Object.values()方法返回一个给定对象自己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

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support54 Yes47 No4110.1
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support5454 Yes474110.36.0

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