How to Create a UUID in JavaScript
The UUID identifier has been used in programming since the days a baby-faced David Walsh became a professional software engineer. My first exposure to UUIDs was via a ColdFusion app I inherited and ... the less we say about that the better. In any event, I was recently surprised to see that JavaScript has the ability to create UUIDs.
Developers can use the native JavaScript crypto library to generate a UUID:
crypto.randomUUID() // '5872aded-d613-410e-841f-a681a6aa8d8b'
crypto.randomUUID() // 'fe6c7438-a833-4c7c-9ea3-cdc84ef41dfc'
crypto.randomUUID() // 'e47a03d4-5da3-4451-a2c1-265de99cc2c1'
crypto.randomUUID() // '04cdadeb-0228-43db-85dc-ce7e960a6cde'
It's important to remember that the UUID is not guaranteed to be unique, though the probability of repetition is incredibly low. I look forward to exploring the window.crypto API further to see what other cool things we can do!
![Animated 3D Flipping Menu with CSS]()
CSS animations aren't just for basic fades or sliding elements anymore -- CSS animations are capable of much more. I've showed you how you can create an exploding logo (applied with JavaScript, but all animation is CSS), an animated Photo Stack, a sweet...
![CSS Gradients]()
With CSS border-radius, I showed you how CSS can bridge the gap between design and development by adding rounded corners to elements. CSS gradients are another step in that direction. Now that CSS gradients are supported in Internet Explorer 8+, Firefox, Safari, and Chrome...
![Dress Up Your Select Elements with FauxSelect]()
I received an email from Ben Delaney a few weeks back about an interesting MooTools script he had written. His script was called FauxSelect and took a list of elements (UL / LI) and transformed it into a beautiful Mac-like SELECT element.
![Implement the Google AJAX Search API]()
Let's be honest...WordPress' search functionality isn't great. Let's be more honest...no search functionality is better than Google's. Luckily for us, Google provides an awesome method by which we can use their search for our own site: the Google AJAX Search API.
Unfortunately, browser support is very patchy so far…
Plenty of shims/polyills are available.
From https://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid
if (! (crypto.randomUUID instanceof Function)) { crypto.randomUUID = function uuidv4() { return ([1e7]+-1e3+-4e3+-8e3+-1e11).replace(/[018]/g, c => (c ^ crypto.getRandomValues(new Uint8Array(1))[0] & 15 >> c / 4).toString(16) ); } }V8 is not equal to JavaScript
Yes, the article should have included ‘node’ or ‘v8’ in the title.
Probably worth mentioning this doesn’t work in Safari or Firefox and is not a W3C Standard nor is it on the W3C Standards Track.
Are there any other libraries that generate uuid other than crypto in js?
https://github.com/uuidjs/uuid
the uuid library
https://www.npmjs.com/package/uuid
A note on browser support would be useful ;) But it‘s great to see that we can soon use it just like that.
Chromium (including Edge): >=92
Firefox: >=95 (Release notes how I discovered the API)
Safari: :(
IE: No!
shim:
if (! (crypto.randomUUID instanceof Function)) { function uuidv4() { return ([1e7]+-1e3+-4e3+-8e3+-1e11).replace(/[018]/g, c => (c ^ crypto.getRandomValues(new Uint8Array(1))[0] & 15 >> c / 4).toString(16) ); } }Turns out I cannot edit comments…
if (! (crypto.randomUUID instanceof Function)) { crypto.randomUUID = function uuidv4() { return ([1e7]+-1e3+-4e3+-8e3+-1e11).replace(/[018]/g, c => (c ^ crypto.getRandomValues(new Uint8Array(1))[0] & 15 >> c / 4).toString(16) ); } }