17 lines
301 B
Markdown
17 lines
301 B
Markdown
---
|
|
title: isFunction
|
|
tags: type,function,beginner
|
|
---
|
|
|
|
Checks if the given argument is a function.
|
|
|
|
Use `typeof` to check if a value is classified as a function primitive.
|
|
|
|
```js
|
|
const isFunction = val => typeof val === 'function';
|
|
```
|
|
|
|
```js
|
|
isFunction('x'); // false
|
|
isFunction(x => x); // true
|
|
``` |