https://github.com/ianstormtaylor/is-empty

Check whether a value is empty.
https://github.com/ianstormtaylor/is-empty

browser javascript node utility

Last synced: 3 months ago
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Check whether a value is empty.

• Host: GitHub
• URL: https://github.com/ianstormtaylor/is-empty
• Owner: ianstormtaylor
• Archived: true
• Created: 2013-08-29T00:36:11.000Z (about 11 years ago)
• Default Branch: master
• Last Pushed: 2019-03-07T23:13:12.000Z (over 5 years ago)
• Last Synced: 2024-07-22T00:04:44.345Z (3 months ago)
• Topics: browser, javascript, node, utility
• Language: JavaScript
• Size: 10.7 KB
• Stars: 46
• Watchers: 4
• Forks: 18
• Open Issues: 6
• Metadata Files:
  • Readme: Readme.md
  • Changelog: History.md

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• awesome-github-star - is-empty

README

        

> **Archived:** I wrote this package quite a while ago, and I'd consider it an anti-pattern. The main use case for it is checking if an object is empty, which can be done with [`lodash.isEmpty`](https://lodash.com/docs/4.17.11#isEmpty) instead. In many other cases, it's easier and more clear for people reading your code to just check `val.length === 0` or `val.size === 0` instead of using a separate package for it. And people continue to ask for more things to be considered "empty" over time, which are breaking changes, and just make it harder to understand what the API this package really offers is. For that reason, I've archived this package and I don't recommend using it anymore.

# is-empty

  Check whether a value is empty.

## Installation

  

```

$ npm install is-empty

$ npm test

```

## Example

```js

var empty = require('is-empty');

empty([]);              // true

empty({});              // true

empty('');              // true

empty(0);               // true

empty(function(){});    // true

empty(null);            // true

empty(undefined);       // true

empty(new Map());       // true

empty(new Set());       // true

empty(new Error());     // true

empty(true);            // false

empty(false);           // false

empty(['a', 'b']);      // false

empty({ a: 'b' });      // false

empty('string');        // false

empty(42);              // false

empty(function(a,b){}); // false

empty(new Map([['key', 'value']])); // false

empty(new Set([1]));    // false

empty(new Error('fail'))// false

```

## API

### isEmpty(value)

  Check whether `value` is empty.

## License

  MIT