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Expand Up @@ -36,16 +36,16 @@ JavaScript 对象中的每个属性能根据三个因素进行分类：

仅访问字符串属性或仅访问 symbol 属性的方法有额外的注解。✅ 表示能访问这个类型的属性；❌ 表示不能访问这个类型的属性。

| | 可枚举的、自己的 | 可枚举的、继承的 | 不可枚举的、自己的 | 不可枚举的、继承的 |
| ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------- | --------------------- | ------------------- | ------------------------- |
| [`Object.keys`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Object/keys)<br />[`Object.values`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Object/values)<br />[`Object.entries`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Object/entries) | ✅<br />(字符串) | ❌ | ❌ | ❌ |
| [`Object.getOwnPropertyNames`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Object/getOwnPropertyNames) | ✅<br />(字符串) | ❌ | ✅<br />(字符串) | ❌ |
| [`Object.getOwnPropertySymbols`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Object/getOwnPropertySymbols) | ✅<br />(symbol) | ❌ | ✅<br />(symbol) | ❌ |
| [`Object.getOwnPropertyDescriptors`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Object/getOwnPropertyDescriptors) | ✅ | ❌ | ✅ | ❌ |
| [`Reflect.ownKeys`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Reflect/ownKeys) | ✅ | ❌ | ✅ | ❌ |
| [`for...in`](/zh-CN/docs/Web/JavaScript/Reference/Statements/for...in) | ✅<br />(字符串) | ✅<br />(字符串) | ❌ | ❌ |
| [`Object.assign`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Object/assign)<br />(第二个参数) | ✅ | ❌ | ❌ | ❌ |
| [Object spread](/zh-CN/docs/Web/JavaScript/Reference/Operators/Spread_syntax) | ✅ | ❌ | ❌ | ❌ |
| | 可枚举的、自己的 | 可枚举的、继承的 | 不可枚举的、自己的 | 不可枚举的、继承的 |
| ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------- | ---------------- | ------------------ | ------------------ |
| [`Object.keys`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Object/keys)<br />[`Object.values`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Object/values)<br />[`Object.entries`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Object/entries) | ✅<br />(字符串) | ❌ | ❌ | ❌ |
| [`Object.getOwnPropertyNames`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Object/getOwnPropertyNames) | ✅<br />(字符串) | ❌ | ✅<br />(字符串) | ❌ |
| [`Object.getOwnPropertySymbols`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Object/getOwnPropertySymbols) | ✅<br />(symbol) | ❌ | ✅<br />(symbol) | ❌ |
| [`Object.getOwnPropertyDescriptors`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Object/getOwnPropertyDescriptors) | ✅ | ❌ | ✅ | ❌ |
| [`Reflect.ownKeys`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Reflect/ownKeys) | ✅ | ❌ | ✅ | ❌ |
| [`for...in`](/zh-CN/docs/Web/JavaScript/Reference/Statements/for...in) | ✅<br />(字符串) | ✅<br />(字符串) | ❌ | ❌ |
| [`Object.assign`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Object/assign)<br />(第二个参数) | ✅ | ❌ | ❌ | ❌ |
| [Object spread](/zh-CN/docs/Web/JavaScript/Reference/Operators/Spread_syntax) | ✅ | ❌ | ❌ | ❌ |

## 通过可枚举性和所有权获取对象的属性

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