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How to Set, Get and Delete Cookies using Vanilla JavaScript

In this tutorial, we are going to learn how to SET, GET and DELETE Cookies using Vanilla JavaScript. We will create functions to reduce our codes and make it easy to do these operations. It will help you in your JavaScript projects.

Cookie Javascript

Getting Started

Follow the following steps to use the codes in your HTML document.

Table of Contents

Basic

Add the following JavaScript codes under a <script> in the head section of your HTML document.

const Cookie = {
  get: (e) => { e = document.cookie.match(new RegExp("(?:^|; )" + e.replace(/([.$?*|{}()[\]\\/+^])/g, "$1") + "=([^;]*)")); return e ? decodeURIComponent(e[1]) : void 0 },
  set: (e, n, o = {}) => { o = { path: "/", ...o }, o.expires instanceof Date && (o.expires = o.expires.toUTCString()); let c = unescape(encodeURIComponent(e)) + "=" + unescape(encodeURIComponent(n)); for (var t in o) { c += "; " + t; var a = o[t]; !0 !== a && (c += "=" + a) } document.cookie = c },
  rem: (e) => { Cookie.set(e, "", { "max-age": -1 }) }
}

Functions

Cookie
.set(key, value, [config]) ⇒ void
.get(key) ⇒ Cookie key value
.rem(key) ⇒ void

Cookie.set(key, value, [config]) ⇒ void

To set cookie with desired key and value.

Param Type Default Description
key string Key of the cookie to set
value string Value of the cookie key
[config] object { path: "/" } To add "max-age" (number), secure (boolean), etc

Returns:

undefined

Example:

<script>
  const userDetails = {
    name: "Deo Kumar",
    email: "deo@fineshopdesign.com"
  };
  Cookie.set("user", JSON.stringify(userDetails), { secure: true, "max-age": 3600 });
</script>

Cookie.get(key) ⇒ Cookie key value

To get cookie with its key.

Param Type Default Description
key string Key of the cookie to get

Returns:

string: value of the cookie key if exists.

undefined: if cookie key doesn't exists.

Example:

<script>
  const cookieValue = Cookie.get("user");
  const userObj = cookieValue ? JSON.parse(cookieValue) : null;
  console.log(userObj);
</script>

Cookie.rem(key) ⇒ void

To remove cookie with its key.

Param Type Default Description
key string Key of the cookie to remove

Returns:

undefined

Example:

<script>
  Cookie.rem("user");
</script>
Related Topics

About the Author

Hey! I'm Deo Kumar, a passionate web developer skilled in JavaScript, Node.js, Cloudflare Workers, KV stores, and Next.js. With a focus on dynamic web applications, I excel in JavaScript and Node.js, ensuring robust websites. As a front-end expe…

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