Generate random string with only numbers or alphabet in JavaScript
This is a simple approach to generate random string with either numbers or letters using a predefined set.
function generateRandomString(alphabetsOnly, numbersOnly, n) {
var text = "";
var possible = alphabetsOnly?"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz":"" + numbersOnly?"0123456789":"";
for (var i = 0; i < n; i++)
text += possible.charAt(Math.floor(Math.random() * possible.length));
return text;
}
generateRandomString(true, false, 6) //ZmyQnw
generateRandomString(true, true, 6) //FUCcCl
generateRandomString(false, true, 6) //165785
