Reflect.ownKeys()

静态方法 Reflect.ownKeys() 返回一个由目标对象自身的属性键组成的数组。

语法

Reflect.ownKeys(target)

参数

target
获取自身属性键的目标对象。

返回值

由目标对象的自身属性键组成的 Array。 

异常

如果目标不是 TypeError

描述

Reflect.ownKeys 方法返回一个由目标对象自身的属性键组成的数组。它的返回值等同于Object.getOwnPropertySymbols(target))。

示例

使用 Reflect.ownKeys()

Reflect.ownKeys({z: 3, y: 2, x: 1}); // [ "z", "y", "x" ]
Reflect.ownKeys([]); // ["length"]

var sym = Symbol.for("comet");
var sym2 = Symbol.for("meteor");
var obj = {[sym]: 0, "str": 0, "773": 0, "0": 0,
           [sym2]: 0, "-1": 0, "8": 0, "second str": 0};
Reflect.ownKeys(obj);
// [ "0", "8", "773", "str", "-1", "second str", Symbol(comet), Symbol(meteor) ]
// Indexes in numeric order, 
// strings in insertion order, 
// symbols in insertion order

规范

Specification Status Comment
ECMAScript 2015 (6th Edition, ECMA-262)
Reflect.ownKeys
Standard Initial definition.
ECMAScript Latest Draft (ECMA-262)
Reflect.ownKeys
Draft  

浏览器兼容

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
ownKeys Chrome Full support 49 Edge Full support 12 Firefox Full support 42 IE No support No Opera Full support 36 Safari Full support 10 WebView Android Full support 49 Chrome Android Full support 49 Firefox Android Full support 42 Opera Android Full support 36 Safari iOS Full support 10 Samsung Internet Android Full support 5.0 nodejs Full support 6.0.0

Legend

Full support  
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No support  
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