FreeCodeCamp challenge: find longest word in a string

find longest word in a stringa FreeCodeCamp challenge

Return the length of the longest word in the provided sentence.

Your response should be a number.

Here are some helpful links:

String.prototype.split()
String.length

function findLongestWord(str) {
  var words = str.split(' ');

  // --> my second solution
  var lengthArr = words.map(wordsLength);
  var max = Math.max(...lengthArr);

  // --> my third solution
  var reduceArr = lengthArr.reduce(reduceLength);
  var reduceArr_2 = words.map(wordsLength).reduce( (a,b) => ( a > b ? a : b) );

  function wordsLength(word){
    return word.length;
  }

  function reduceLength(a, b) {
    return (a > b ? a : b);
  }

// --> my first solution
  var highScore = 0;
  for (var i = 0 ; i < words.length; i++) {
    var score = words[i].length;

    if( score >  highScore) {
      highScore = score;
    }
  }

  console.log('RETURN HIGHSCORE => ', highScore );
  overlay(highScore);
  return highScore;
}