21 lines
397 B
Markdown
21 lines
397 B
Markdown
---
|
|
title: Value is boolean
|
|
tags: type
|
|
expertise: beginner
|
|
firstSeen: 2017-12-17T17:55:51+02:00
|
|
lastUpdated: 2020-09-15T16:28:04+03:00
|
|
---
|
|
|
|
Checks if the given argument is a native boolean element.
|
|
|
|
- Use `typeof` to check if a value is classified as a boolean primitive.
|
|
|
|
```js
|
|
const isBoolean = val => typeof val === 'boolean';
|
|
```
|
|
|
|
```js
|
|
isBoolean(null); // false
|
|
isBoolean(false); // true
|
|
```
|