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。
The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.
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
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 | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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
- Full support
- No support
- No support