create a iota seed in plain js

seed.js

function createSeed(){
    const seedsize = 81;
    const chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ9";
    let seed = "";
    for (var i = 0, n = chars.length; i < seedsize; ++i) {
        seed += chars.charAt(Math.floor(Math.random() * n));
    }
    return seed;
}

console.log(createSeed());

node seed.js
profit.