--- title: Object.values() slug: Web/JavaScript/Reference/Global_Objects/Object/values tags: - JavaScript - Method - Object - Reference translation_of: Web/JavaScript/Reference/Global_Objects/Object/values ---
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{{jsxref("Statements/for...in", "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 )。
Object.values(obj)
obj
一个包含对象自身的所有可枚举属性值的数组。
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。
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']
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; }
Specification | Status | Comment |
---|---|---|
{{SpecName('ESDraft', '#sec-object.values', 'Object.values')}} | {{Spec2('ESDraft')}} | Initial definition. |
{{SpecName('ES8', '#sec-object.values', 'Object.values')}} | {{Spec2('ES8')}} |
{{Compat("javascript.builtins.Object.values")}}