21 lines
415 B
Markdown
21 lines
415 B
Markdown
---
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title: Value is function
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tags: type,function
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cover: blog_images/boulder-beach.jpg
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firstSeen: 2017-12-17T17:55:51+02:00
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lastUpdated: 2020-09-15T16:28:04+03:00
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---
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Checks if the given argument is a function.
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- Use `typeof` to check if a value is classified as a function primitive.
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```js
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const isFunction = val => typeof val === 'function';
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```
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```js
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isFunction('x'); // false
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isFunction(x => x); // true
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```
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