Generate random string

var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
var str = '';
for ( var i = 0; i < 10; i++ ) str += chars.charAt(Math.floor(Math.random() * chars.length));

var chars - declare characters string to use for random generation
var str - declare our resulting variable, will contain random string
10 - length of random string
chars.charAt(Math.floor(Math.random() * chars.length)) - return random character from our chars

group: random_generate

link_youtube: https://youtu.be/UyX_fvabXyw