JSFiddle - React, Tailwind, and code Playground

JavaScript

function GenRandKey(){ 
    var keychars = "abcdefghijklmnopqrstuvwxyz"; 
    var chars = keychars.split(""); 
    ret=""; lim = chars.length; 
    for(i=0; i<lim; i++){ 
        console.log(i, chars, ret)
        index = Math.floor(chars.length*Math.random()); 
        ret += chars[index]; 
        chars.splice(index,1); 
    } 
    document.body.innerHTML = ret; 
} 

GenRandKey()