20 lines
485 B
Markdown
20 lines
485 B
Markdown
---
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title: isArrayLike
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tags: type,array,intermediate
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---
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Checks if the provided argument is array-like (i.e. is iterable).
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- Check if the provided argument is not `null` and that its `Symbol.iterator` property is a function.
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```js
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const isArrayLike = obj => obj != null && typeof obj[Symbol.iterator] === 'function';
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```
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```js
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isArrayLike([1, 2, 3]); // true
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isArrayLike(document.querySelectorAll('.className')); // true
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isArrayLike('abc'); // true
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isArrayLike(null); // false
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```
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