All about website 'Cookies' not biscuits.

What is cookies?

Cookies are small pieces of data that websites store on a user's browser. They are commonly used to remember information about the user or their preferences between different visits to a website. Cookies are sent by the web server to the user's browser and are then stored on the user's device.

Overview to use cookies 

Here's a basic overview of how to use cookies in JavaScript:

Setting a Cookie:

   To set a cookie, you use the `document.cookie` property. Here's an example of setting a cookie:

  document.cookie = "username=John Doe; expires=Thu, 18 Dec 2022
  12:00:00 UTC; path=/";

In this example, a cookie named "username" is set with the value "John Doe." The `expires` attribute specifies when the cookie will expire.

Getting a Cookie:

   To retrieve a cookie, you can read the `document.cookie` property:

  const username =
  document.cookie.replace(/(?:(?:^|.*;\s*)username\s*=\s*([^;]*).*$)|^.*$/,
  "$1");

   This code extracts the value of the "username" cookie.

Deleting a Cookie:

To delete a cookie, you can set its expiration date to a past date. This will effectively remove the cookie.

  document.cookie = "username=; expires=Thu, 01 Jan 1970 00:00:00
  UTC; path=/;";

Cookie Attributes:

   Cookies can have various attributes, such as `expires` (to set an expiration date), `path` (specifying the URL path for which the cookie is valid), `domain` (specifying the domain for which the cookie is valid), and `secure` (if the cookie should only be sent over secure connections).

Here's a simple example using JavaScript to set, get, and delete a cookie:

const username =
  document.cookie.replace(/(?:(?:^|.*;\s*)username\s*=\s*([^;]*).*$)|^.*$/,
  "$1"); 
  // Set a cookie . 
  document.cookie = "username=John Doe; expires=Thu, 18 Dec 2022 12:00:00 UTC;
  path=/";
  // Get a cookie

  const username =
  document.cookie.replace(/(?:(?:^|.*;\s*)username\s*=\s*([^;]*).*$)|^.*$/,
  "$1");

  console.log("Username:", username);
  // Delete a cookie

  document.cookie = "username=; expires=Thu, 01 Jan 1970 00:00:00 UTC; path=/;";

Keep in mind that cookies have certain limitations, and privacy concerns should be considered when working with them. Modern web development often uses other technologies like `localStorage` or `sessionStorage` for client-side storage, and server-side storage mechanisms for more sensitive data.