Javascript example

by nlviands

HTML

<h1 id="UUID"></h1>
<input type="submit" id="byBtn" value="Generate UUID" onclick="generateUUID()"/>

JavaScript

function generateUUID() {
    var d = new Date().getTime();
    var uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
        var r = (d + Math.random()*16)%16 | 0;
        d = Math.floor(d/16);
        return (c=='x' ? r : (r&0x7|0x8)).toString(16);
    });
    
    var title = document.getElementById('UUID');
    title.innerHTML = uuid.toUpperCase();
    
}