Random string generator

(function(length){
    length = length || 16;
    const symbols = "1234567890`~!@#$%^&*()[]\\{}|;':\"/.,?><qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM";

    let s = "";
    for (let i = 0; i < length; i++) {
        s += symbols[Math.floor(Math.random() * symbols.length)];
    }
    return s;
})()