JSFiddle - React, Tailwind, and code Playground

by Felipe Miosso

HTML

<p id="result"></p>

JavaScript

var words = "Heyyyyy I beeeeeeeelieve".split(' ');
var aux = [], 
    values = [],
    k = 0,
    heigher = 0,
    letter = "";
    word = "";

for(var i = 0; i < words.length; i++) {  
    for(var j = 0; j < words[i].length; j++) {
        values[k] = words[i].match(new RegExp(words[i][j],'g')).length;
        if(values[k] > heigher) {
            heigher = values[k];
            letter = words[i][j];
            word = words[i];
        }
        k++;
    } 
}

document.getElementById('result').innerHTML = "word: " + word + " letter: " + letter + " total: " + heigher;