23 lines
475 B
Markdown
23 lines
475 B
Markdown
---
|
|
title: Value is nil
|
|
tags: type
|
|
expertise: beginner
|
|
cover: blog_images/river-houses.jpg
|
|
firstSeen: 2018-01-16T16:50:21+02:00
|
|
lastUpdated: 2020-10-20T23:02:01+03:00
|
|
---
|
|
|
|
Checks if the specified value is `null` or `undefined`.
|
|
|
|
- Use the strict equality operator to check if the value of `val` is equal to `null` or `undefined`.
|
|
|
|
```js
|
|
const isNil = val => val === undefined || val === null;
|
|
```
|
|
|
|
```js
|
|
isNil(null); // true
|
|
isNil(undefined); // true
|
|
isNil(''); // false
|
|
```
|