Returns true if the value is a primitive.
- Types
- ESM
- CJS
- License
- MIT
- Deps
- 0
- Install Size
- 6.8 kB
- Vulns
- 0
- Published
npm install is-primitivepnpm add is-primitiveyarn add is-primitivebun add is-primitivedeno add npm:is-primitivevlt install is-primitivevp add is-primitiveYou might not need this dependency.
You can check typeof of a value to determine if it's a primitive. Note that typeof null is "object" so you need to check for null separately.
const isPrimitive = (value) => value === null || (typeof value !== "function" && typeof value !== "object");is-primitive 
Returns
trueif the value is a primitive.
Please consider following this project's author, Jon Schlinkert, and consider starring the project to show your ❤️ and support.
Install
Install with npm:
$ npm install --save is-primitivePrimitive values
The Mozilla docs for "Primitive values" defines specifies six data types that are primitives:
BooleanNullUndefinedNumberStringSymbol(new in ECMAScript 6)
Usage
var isPrimitive = require('is-primitive');true
All of the following return true:
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()));
//=> truefalse
Everything else returns false:
console.log(isPrimitive({}));
console.log(isPrimitive([]));
console.log(isPrimitive(function(){}));
console.log(isPrimitive(new Date()));
// et cetera...
//=> falseAbout
Contributing
Pull requests and stars are always welcome. For bugs and feature requests, please create an issue.
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:
$ npm install && npm testBuilding docs
(This project's readme.md is generated by verb, please don't edit the readme directly. Any changes to the readme must be made in the .verb.md readme template.)
To generate the readme, run the following command:
$ npm install -g verbose/verb#dev verb-generate-readme && verbRelated projects
You might also be interested in these projects:
- is-number: Returns true if the value is a number. comprehensive tests. | homepage
- is-plain-object: Returns true if an object was created by the
Objectconstructor. | homepage - kind-of: Get the native type of a value. | homepage
Contributors
| Commits | Contributor |
|---|---|
| 11 | jonschlinkert |
| 1 | ljharb |
| 1 | bttmly |
| 1 | hemanth |
Author
Jon Schlinkert
License
Copyright © 2017, Jon Schlinkert. Released under the MIT License.
This file was generated by verb-generate-readme, v0.6.0, on November 23, 2017.