querySelector class? (JAVASCRIPT)

I made a function to change a photo when an element is added in my table, which table I created a class to get the photo to change, but to get the html element, I need to use the querySelector, but I'm not getting with class , but when it's with id it goes.

Ex:

function teste() {
  var elemento = document.querySelector('info-status');

    var conteudo = elemento.textContent || elemento.innerText;

    var teste = conteudo.length;

    if (teste > 0) {

      var img = document.getElementById('TrocaPost');
      var imgg = document.getElementById('TrocaEntregue');
      var image = document.getElementById('TrocaViagem');
      img.src = 'caminhao/caminhaoCERTOazul.png';
      imgg.src = 'caminhao/caminhaoCERTOazul.png';
      image.src = 'caminhao/caminhaoCERTOazul.png';

    }
}

o info-status when id, it takes, but when it is class it does not catch. Is there something wrong with my code or does the querySelector only handle ID?