make long word into ... in javascript code example

Example 1: find longest word in string javascript

function data(str){
           var show = str.split(" ");
            show.sort(function (a,b){
                return b.length - a.length; 
            })
            return show[0];
      }
      console.log(data(str = "javascript is my favourite language "));

Example 2: js find longest vword

function findLongestWord(str) {
  var longestWord = str.split(' ').sort(function(a, b) { return b.length - a.length; });
  return longestWord[0].length;
}
findLongestWord("The quick brown fox jumped over the lazy dog");