generate random characters in javascript code example

Example 1: javascript generate random string

// Generate a random alphanumerical string of length 11 ( change substring parameter for other length)
Math.random().toString(36).substring(2);

Example 2: generate random character in javascript

var characters = 'abcdefghijklmnopqrstuvwxyz0123456789';
var result = ""
var chaactersLength = characters.length;

for ( var i = 0; i < 5 ; i++ ) {
    result += characters.charAt(Math.floor(Math.random() * chaactersLength));
}

console.log(result)

Example 3: javascript get random string

function getRandomString(length) {
    var randomChars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
    var result = '';
    for ( var i = 0; i < length; i++ ) {
        result += randomChars.charAt(Math.floor(Math.random() * randomChars.length));
    }
    return result;
}

//usage: getRandomString(20); // pass desired length of random string

Example 4: random alphabet javascript

Math.random().toString(36).substr(2, 5);

Example 5: javascript random char

const characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
function generateRandomCode(){
    let result = ""
    let charactersLength = characters.length;
    for ( var i = 0; i < 6 ; i++ ) {
        result += characters.charAt(Math.floor(Math.random() * charactersLength));
    }
    return result
}