Question

How to generate random string in JavaScript

Answer 1

function generate_random_string(size) {
    let characters = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
    let randomChars = "";
 
    for (let i = 0; i < size; i++) {
        randomChars += characters.charAt(Math.floor(Math.random() * characters.length));
    }
 
    return randomChars;
}

console.log(generate_random_string(10));

console.log(generate_random_string(10));

 
 
/*
 
run:
 
ftYpjfMtrS
tmOjeYAwac
 
*/

 
 

 

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Answer 2

// base 36 - [0-9a-z]

console.log((Math.random() + 1).toString(36).substring(2, 9));

console.log((Math.random() + 1).toString(36).substring(2, 5));
 
 
 
/*
 
run:
 
vzadiqx
f0s
 
*/

 

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Answer 3

console.log((Math.random() + 1).toString(36).substring(7));

console.log((Math.random() + 1).toString(36).substring(5));

console.log((Math.random() + 1).toString(36));


  
/*
  
run:
  
vunly
7zlo277
1.epxxxzsmno
  
*/

 

Cleaner teeth, healthier you!
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Answer 4

let crypto = require("crypto");
 
let rnd = crypto.randomBytes(30).toString('hex');
 
 
console.log(rnd);
  
  
  
/*
run:
      
228a9960f27687aff31332059a3fd2851906317e05334db1bd81e3d713d5
 
*/

 

Cleaner teeth, healthier you!
Get The Secret to a Bright and Healthy Smile