Finding longest word, passing 9/10 tests, Why?

This is an task from codesignal.
It’s not a homework or something else, just I writed a code and now trying understand what’s wrong.
Let’s see task requirements.
Define a word as a sequence of consecutive English letters. Find the longest word from the given string.

Example.

For text = "Ready, steady, go!", the output should be
solution(text) = "steady".

Well, now I’m sharing my code.

function solution(text) {
 let words = text.match(/\w+/g);
    
    let ml = Math.max(...words.map(el=>el.length))
    
    for(let i = 0; i < words.length; i++){
        if(words[i].length == ml){
            return words[i]
        }
    }
}

It’s passing all tests, except of one hide test. Now I opened that hide test it looks like this text: "ab-CDE-fg_hi". Expected output of this test is "CDE" .
Now I’m trying understand what’s the problem and why it’s not passing this test, can someone please explain me.

I’m newbie so please be more polite)

>Solution :

/\w+/ also includes an underscore, try to make the regex more precise, for example /[A-Za-z0-9]+/:

function solution(text) {
 let words = text.match(/[A-Za-z0-9]+/g);
    
    let ml = Math.max(...words.map(el=>el.length))
    
    for(let i = 0; i < words.length; i++){
        if(words[i].length == ml){
            return words[i]
        }
    }
}

console.log(solution("ab-CDE-fg_hi"));

You could also iterate the words immediately and find your max sooner:

function solution(text) {
  let max = '';
  for(const word of text.match(/[A-Za-z0-9]+/g)){
    if(max.length < word.length){
      max = word;
    }
  }
  return max;
}

console.log(solution("ab-CDE-fg_hi"));