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JavaScript

Posted by Oskar Näsman
Oskar Näsman
7,007 Points

I can't get add item button to work..

Can't find out what's wrong. Please help! My JavaScript code:

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.addItemInput");


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);
});```java


And the HTML code:
```<!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>
        <script src="app.js"></script>
     </div>
    </body>
</html>
```html

1 Answer

KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,971 Points
KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,971 Points

The issue is with this line:

const addItemButton = document.querySelector("button.addItemInput");

Since the class name for the button is addItemButton you will need to use that to select it

const addItemButton = document.querySelector("button.addItemButton");