javascript get random string

1var crypto = require("crypto");
2var id = crypto.randomBytes(20).toString('hex');
3
4// "bb5dc8842ca31d4603d6aa11448d1654"

1function getRandomString(length) {
2    var randomChars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
3    var result = '';
4    for ( var i = 0; i < length; i++ ) {
5        result += randomChars.charAt(Math.floor(Math.random() * randomChars.length));
6    }
7    return result;
8}
9
10//usage: getRandomString(20); // pass desired length of random string

1function randomString(length) {
2		var result           = '';
3		var characters       = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789~!@#$%^&*()_+=-';
4		var charactersLength = characters.length;
5		for ( var i = 0; i < length; i++ ) {
6		   result += characters.charAt(Math.floor(Math.random() * charactersLength));
7		}
8		return result;
9	 }
10randomString(4);

1const string_length = 10
2[...Array(string_length)].map(i=>(~~(Math.random()*36)).toString(36)).join('')

1 Math.random().toString(36).substring(2, 15) + Math.random().toString(36).substring(2, 15);