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JavaScript JavaScript and the DOM (Retiring) Making Changes to the DOM Appending Nodes

Posted by jeremy suter
jeremy suter
15,339 Points

I think I have everything correct as in the video, but I can't seem to get my 'add item' button to work.

<!DOCTYPE html>
<html>
  <head>
    <title>JavaScript and the DOM</title>
    <link rel="stylesheet" href="css/style.css">
  </head>
  <body>
    <h1 id="myHeading">JavaScript and the DOM</h1>
    <p>Making a web page interactive</p>
    <button id="toggleList">Hide list</button>
    <div class="list">
      <p class="description">Things that are purple:</p>
      <input type="text" class="description">
      <button class="description">Change list description</button>
      <ul>
        <li>grapes</li>
        <li>amethyst</li>
        <li>lavender</li>
        <li>plums</li>
      </ul>
      <input type="text" class="addItemInput">
      <button class="addItemButton">Add item</button>      
    </div>
    <script src="app.js"></script>
  </body>
</html>
app.js 
const toggleList = document.getElementById('toggleList');
const listDiv = document.querySelector('.list');
const descriptionInput = document.querySelector('input.description');
const descriptionP = document.querySelector('p.description');
const descriptionButton = document.querySelector('button.description');
const addItemInput = document.querySelector('input.addItemInput');
const addItemButton = document.querySelector('button.addItemButton');

toggleList.addEventListener('click', () => {
  if (listDiv.style.display == 'none') {
    toggleList.textContent = 'Hide list';
    listDiv.style.display = 'block';
  } else {
    toggleList.textContent = 'Show list';                        
    listDiv.style.display = 'none';
  }                         
});

descriptionButton.addEventListener('click', () => {
  descriptionP.innerHTML = descriptionInput.value + ':';
});

addItemButton.addEventListener('click', () => {
  let ul = document.getElementsByTagName('ul')[0];
  let li = document.createElement('li');
  li.textContent = addItemInput.value;
  ul.appendChild(li);
});

2 Answers

Adam N
Adam N
70,280 Points
Adam N
Adam N
70,280 Points

Looks good. Are you clicking the "Add item" button? Pressing enter wont work with this handler.

Please mark my response as the 'best answer' if it helps you out!

Andrew Comiskey
PLUS
Andrew Comiskey
Courses Plus Student 3,339 Points
Andrew Comiskey
Andrew Comiskey
Courses Plus Student 3,339 Points

I have the same problem. For good measure, I've even tried downloading the project files, opening the index.html in the "final" folder, and even then, the "add item" button does not work...

Andrew Comiskey
Andrew Comiskey
Courses Plus Student 3,339 Points
Andrew Comiskey
Andrew Comiskey
Courses Plus Student 3,339 Points

Okay, so I finally figured out what my issue was, and maybe it will be the same for you. Apparently I forgot to close the index.html file from the previous video (I downloaded the project files). The whole time, I was refreshing the index.html from the previous video. I opened the index.html from the fifth video, and everything was fine.