Generate random string in JavaScript.

The other day I had a challenge and I have to create a function that generates the random string.

I’d like to show a couple of different ways to do that.

1. User the npm library to generate a random string:

To install randomstring, use npm:

npm install randomstring

Usage

var randomstring = require("randomstring");

randomstring.generate();
// >> "XwPp9xazJ0ku5CZnlmgAx2Dld8SHkAeT"
randomstring.generate(7);
// >> "xqm5wXX"

randomstring.generate({
length: 12,
charset: 'alphabetic'
});
// >> "AqoTIzKurxJi"

randomstring.generate({
charset: 'abc'
});
// >> "accbaabbbbcccbccccaacacbbcbbcbbc"

Command Line Usage

$ npm install -g randomstring
$ randomstring
> sKCx49VgtHZ59bJOTLcU0Gr06ogUnDJi
$ randomstring 7
> CpMg433
$ randomstring length=24 charset=github readable
> hthbtgiguihgbuttuutubugg

2. Create a function. The function I used:

let refCode = Math.random().toString(20).substring(2, 5) + Math.random().toString(20).substring(2, 5);
refCode;
// >> f1i64a

3. Using MD5 Library:

Usage

Install the blueimp-md5 package with npm:

npm install blueimp-md5

Include the (minified) JavaScript MD5 script in your HTML markup:

<script src="js/md5.min.js"></script>

In your application code, calculate the (hex-encoded) MD5 hash of a string by calling the md5 method with the string as an argument:

var hash = md5('value') // "2063c1608d6e0baf80249c42e2be5804"

The shortest way:

md5(Math.random())

To limit the size to 5:

md5(Math.random()).substr(0, 5)

Have fun coding!