https://github.com/jonschlinkert/is-primitive
Is the typeof value a javascript primitive?
https://github.com/jonschlinkert/is-primitive
check is javascript jonschlinkert kind-of node nodejs number primitive primitive-values string symbol type typeof
Last synced: about 12 hours ago
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Is the typeof value a javascript primitive?
- Host: GitHub
- URL: https://github.com/jonschlinkert/is-primitive
- Owner: jonschlinkert
- License: mit
- Created: 2014-09-26T07:40:27.000Z (over 10 years ago)
- Default Branch: master
- Last Pushed: 2021-03-20T04:24:09.000Z (almost 4 years ago)
- Last Synced: 2025-02-14T03:05:13.701Z (8 days ago)
- Topics: check, is, javascript, jonschlinkert, kind-of, node, nodejs, number, primitive, primitive-values, string, symbol, type, typeof
- Language: JavaScript
- Size: 18.6 KB
- Stars: 37
- Watchers: 5
- Forks: 9
- Open Issues: 3
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# is-primitive [](https://www.npmjs.com/package/is-primitive) [](https://npmjs.org/package/is-primitive) [](https://npmjs.org/package/is-primitive) [](https://travis-ci.org/jonschlinkert/is-primitive)
> Returns `true` if the value is a primitive.
Please consider following this project's author, [Jon Schlinkert](https://github.com/jonschlinkert), and consider starring the project to show your :heart: and support.
## Install
Install with [npm](https://www.npmjs.com/):
```sh
$ npm install --save is-primitive
```
## Primitive values
The [Mozilla docs for "Primitive values"](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Primitive_values) defines specifies six data types that are primitives:
* `Boolean`
* `Null`
* `Undefined`
* `Number`
* `String`
* `Symbol` (new in ECMAScript 6)
## Usage
```js
var isPrimitive = require('is-primitive');
```
## true
All of the following return `true`:
```js
console.log(isPrimitive(false));
console.log(isPrimitive(true));
console.log(isPrimitive(null));
console.log(isPrimitive());
console.log(isPrimitive(42));
console.log(isPrimitive('abc'));
console.log(isPrimitive(Symbol()));
//=> true
```
## false
Everything else returns `false`:
```js
console.log(isPrimitive({}));
console.log(isPrimitive([]));
console.log(isPrimitive(function(){}));
console.log(isPrimitive(new Date()));
// et cetera...
//=> false
```
## About
Contributing
Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](../../issues/new).
Running Tests
Running and reviewing unit tests is a great way to get familiarized with a library and its API. You can install dependencies and run tests with the following command:
```sh
$ npm install && npm test
```
Building docs
_(This project's readme.md is generated by [verb](https://github.com/verbose/verb-generate-readme), please don't edit the readme directly. Any changes to the readme must be made in the [.verb.md](.verb.md) readme template.)_
To generate the readme, run the following command:
```sh
$ npm install -g verbose/verb#dev verb-generate-readme && verb
```
### Related projects
You might also be interested in these projects:
* [is-number](https://www.npmjs.com/package/is-number): Returns true if the value is a number. comprehensive tests. | [homepage](https://github.com/jonschlinkert/is-number "Returns true if the value is a number. comprehensive tests.")
* [is-plain-object](https://www.npmjs.com/package/is-plain-object): Returns true if an object was created by the `Object` constructor. | [homepage](https://github.com/jonschlinkert/is-plain-object "Returns true if an object was created by the `Object` constructor.")
* [kind-of](https://www.npmjs.com/package/kind-of): Get the native type of a value. | [homepage](https://github.com/jonschlinkert/kind-of "Get the native type of a value.")
### Contributors
| **Commits** | **Contributor** |
| --- | --- |
| 11 | [jonschlinkert](https://github.com/jonschlinkert) |
| 1 | [ljharb](https://github.com/ljharb) |
| 1 | [bttmly](https://github.com/bttmly) |
| 1 | [hemanth](https://github.com/hemanth) |
### Author
**Jon Schlinkert**
* [github/jonschlinkert](https://github.com/jonschlinkert)
* [twitter/jonschlinkert](https://twitter.com/jonschlinkert)
### License
Copyright © 2017, [Jon Schlinkert](https://github.com/jonschlinkert).
Released under the [MIT License](LICENSE).
***
_This file was generated by [verb-generate-readme](https://github.com/verbose/verb-generate-readme), v0.6.0, on November 23, 2017._