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.

Table of Contents

1. Getting Started
   1. Basic
   2. Functions
      1. Cookie.set(key, value, [config]) ⇒ void
      2. Cookie.get(key) ⇒ Cookie key value
      3. Cookie.rem(key) ⇒ void

Getting Started

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

Basic

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

JavaScript

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:

Cookie.set()

<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:

Cookie.get()

<script>
  const cookieValue = Cookie.get("user");
  const userObj = cookieValue != undefined ? 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:

Cookie.rem()

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