38 lines
912 B
Markdown
38 lines
912 B
Markdown
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---
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title: Array isArray
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localeTitle: Array isArray
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---
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如果对象是数组，则`Array.isArray()`方法返回`true`否则返回`false` 。
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## 句法
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```
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Array.isArray(obj)
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```
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### 参数
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**obj**要检查的对象。
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[MDN链接](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/isArray) | [MSDN链接](https://msdn.microsoft.com/en-us/LIBRary/ff848265%28v=vs.94%29.aspx)
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## 例子
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```
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// all following calls return true
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Array.isArray([]);
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Array.isArray([1]);
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Array.isArray(new Array());
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// Little known fact: Array.prototype itself is an array:
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Array.isArray(Array.prototype);
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// all following calls return false
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Array.isArray();
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Array.isArray({});
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Array.isArray(null);
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Array.isArray(undefined);
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Array.isArray(17);
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Array.isArray('Array');
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Array.isArray(true);
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Array.isArray(false);
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Array.isArray({ __proto__: Array.prototype });
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```
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