How to generate random string using javascript?

There are multiple ways to generate random string in javascript:

1. Using Math.Random

Math.random().toString(36).substring(6); // .substring(6) for 6 characters

2. Creating a function

function randomString() {
	var chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz";
	var string_length = 8;
	var randomstring = '';
	for (var i=0; i<string_length; i++) {
		var rnum = Math.floor(Math.random() * chars.length);
		randomstring += chars.substring(rnum,rnum+1);
	}
	document.randform.randomfield.value = randomstring;
}

You can call the above function like

<input type="button" value="Generate Random String" onClick="randomString();">

You can generate random string using following code

(function() {
		var randomString = function(length) {
			
			var text = "";
		
			var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
			
			for(var i = 0; i < length; i++) {
			
				text += possible.charAt(Math.floor(Math.random() * possible.length));
			
			}
			
			return text;
		}

		// call function random string with length
		var rand= randomString(10);
		
		// insert random string to the field
		var elem = document.getElementById("randomString").value = rand;
		
	})();