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Jar Build Status

A tiny (< 1kb) helper library that makes working with cookies a bit easier.

Installation | API | Browser Compatibility | License

Want to learn how to write your own vanilla JS libraries? Check out my Vanilla JS Pocket Guides or join the Vanilla JS Academy and level-up as a web developer. 🚀


The CDN is the fastest and simplest way to get started, but you can use importable modules or a direct download if you’d prefer.

<!-- Get the latest major version -->
<script src=""></script>

Jar uses semantic versioning. You can grab a major, minor, or patch version from the CDN with the @1.2.3 syntax. You can find all available versions under releases.

ES Modules

Jar also supports modern browsers and module bundlers (like Rollup, Webpack, Snowpack, and so on) using the ES modules import syntax. Use the .es version.

import jar from '';


You can also use NPM (or your favorite package manager). First, install with NPM.

npm install jarvanillajs --save

Then import the package.

import jar from 'jarvanillajs';


If you use NodeJS, you can import jar using the require() method with the .cjs version.

let jar = require('');


If you use RequireJS, SystemJS, and other AMD formats, you can import jar with the .amd version.

requirejs([''], function (jar) {

Direct Download

You can download the files directly from GitHub.

Compiled and production-ready code can be found in the dist directory. The src directory contains development code.

<script src="path/to/jar.min.js"></script>



Create a cookie. Pass in the cookie name and value as arguments.

// Create a cookie named `sandwich` with a value of `turkey`
jar.set('sandwich', 'turkey');

As an optional third argument, provide an object of options to use for the cookie. The default values are shown below.

let options = {
	path: '/',         // path to set the cookie at
	domain: hostname,  // domain for the cookie
	'max-age': null,   // maximum amount of time to keep the cookie, in seconds
	expires: null,     // date on which to expire the cookie (GMT format)
	secure: false,     // the cookie can only be transmitted over HTTPS
	'same-site': 'lax' // lax|strict|none

For example, this cookie is set for the root path ('/'), and expires in one week (60 seconds x 60 minutes x 24 hours x 7 days)

jar.set('drink', 'soda', {
	'max-age': 60 * 60 * 24 * 7


Get the value of a cookie. Pass in the cookie name as an argument.

// Get the `sandwich` cookie


Delete a cookie. Pass in the cookie name as an argument.

// Delete the `sandwich` cookie

If you passed in an option for path other than the default /, you must also provide that as a second argument.

// Delete the `drink` cookie at the /order path
jar.remove('drink', '/order');

Browser Compatibility

Jar works in all modern browsers on desktop and mobile.


The code is available under the MIT License.


A tiny (< 1kb) library that makes working with cookies easier.





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