JavaScript Random String Generator

Home JavaScript DOM JavaScript Random String Generator

I needed a random string for various purposes. For example, to provide a unique ID to HTML elements via JavaScript. The code below is a semi-random string generator function.

let guid = function () {
    let S4 = function () {
        return (((1 + Math.random()) * 0x10000)|0).toString(16).substring(1);
    };

    return (S4() + S4() + '-' + S4() + '-' + S4() + '-' + S4() + '-' + S4() + S4() + S4());
};

It should return random strings, similar to the ones below:

ff31943b-0818-6651-d3a5-9ffb43a5d410
542b312d-8b63-9327-c25e-2423fd93c797
c49d26a2-cc0a-99ff-df6c-f8cd5f7d9f60
beeb0e19-65ee-664f-a953-0e99288b03ec

on in JavaScript DOM | Last modified on

Next article

Image Beacons

Related Posts

JavaScript

April 30, 2025

How to Defer Image Loading with Vanilla JavaScript

JavaScript

July 2, 2024

How to Build a Vertical Off-Canvas Menu Bar Using JavaScript and CSS

JavaScript

July 2, 2024

How to Build a Double Off-Canvas Menu Using JavaScript