How to return an error with JavaScript when someone enter just space on name field in a array?

Question

This question already has answers here: question from:https://stackoverflow.com/questions/65848819/how-to-return-an-error-with-javascript-when-someone-enter-just-space-on-name-fie

Answer 1

Use a regular expression to test if a word is just spaces, and report an error.

function megaFriend(str) {
  var wordLength = 0;
  var biggestWord;
  for (var i = 0; i < str.length; i++) {
    if (str[i].match(/^s+$/)) {
      alert("Spaces entered");
      return false;
    }
    if (str[i].length > wordLength) {
      var wordLength = str[i].length;
      biggestWord = str[i];
    }
  }
  return biggestWord;
}

console.log(megaFriend(['Nahid', 'Hassan', 'Ahugoggghs', '                ']));