1  const feedback = document.forms.feedback;
 2  feedback.hidden = false;
 3  
 4  feedback.addEventListener("submit", function(ev) {
 5      ev.preventDefault();
 6      const commentElement = document.getElementById("feedback");
 7      commentElement.style.display = "block";
 8      feedback.firstElementChild.disabled = true;
 9      const data = ev.submitter.getAttribute("data-md-value");
10      const note = feedback.querySelector(".md-feedback__note [data-md-value='" + data + "']");
11      if (note) {
12          note.hidden = false;
13      }
14  })