Reflect.ownKeys()

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2016.

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。

尝试一下

const object1 = {
  property1: 42,
  property2: 13,
};

const array1 = [];

console.log(Reflect.ownKeys(object1));
// Expected output: Array ["property1", "property2"]

console.log(Reflect.ownKeys(array1));
// Expected output: Array ["length"]

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 Object,抛出一个 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.getOwnPropertyNames(target).concat(Object.getOwnPropertySymbols(target))

示例

使用 Reflect.ownKeys()

js
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
ECMAScript® 2025 Language Specification
# sec-reflect.ownkeys

浏览器兼容性

Report problems with this compatibility data on GitHub
desktopmobileserver
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
Deno
Node.js
ownKeys

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support

参见