Generating Unique GUIDs in JavaScript: A Step-by-Step Guide

 In JavaScript, you can create a GUID (Globally Unique Identifier) by generating a random string using the Math.random() function and combining it with the current timestamp. Here's an example of how you can create a GUID in JavaScript:

function createGUID() {
  function s4() {
    return Math.floor((1 + Math.random()) * 0x10000)
      .toString(16)
      .substring(1);
  }

  return (
    s4() +
    s4() +
    '-' +
    s4() +
    '-' +
    s4() +
    '-' +
    s4() +
    '-' +
    s4() +
    s4() +
    s4()
  );
}

var guid = createGUID();
console.log(guid);

This code defines a function called createGUID() that generates a random string of hexadecimal characters. It calls this function multiple times to create a string in the format xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx, where each x represents a random hexadecimal character.

You can use the createGUID() function to generate a GUID whenever you need one in your JavaScript code. The generated GUID will be unique (although not guaranteed to be truly globally unique) each time you run the function.