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JavaScript JavaScript and the DOM (Retiring) Responding to User Interaction Event Delegation

Killeon Patterson
Killeon Patterson
18,425 Points
Posted by Killeon Patterson
Killeon Patterson
18,425 Points

in the listener that has been selected by the section element

I'm receiving the unexpected token '}'error message for this code. I'm using the if statement to the best of my attempt. Is it the (e) parameter that needs to be changed?

index.html 
<!DOCTYPE html>
<html>
    <head>
        <title>JavaScript and the DOM</title>
    </head>
    <link rel="stylesheet" href="style.css" />
    <body>
        <section>
            <h1>Making a Webpage Interactive</h1>
            <p>JavaScript is an exciting language that you can use to power web servers, create desktop programs, and even control robots. But JavaScript got its start in the browser way back in 1995.</p>
            <hr>
            <p>Things to Learn</p>
            <ul>
                <li>Item One: <input type="text"></li>
                <li>Item Two: <input type="text"></li>
                <li>Item Three: <input type="text"></li>
                <li>Item Four: <input type="text"></li>
            </ul>
            <button>Save</button>
        </section>
        <script src="app.js"></script>
    </body>
</html>
app.js 
let section = document.getElementsByTagName('section');

section.addEventListener('click', (e) => {
  if (event.target.tagName == ('LI') {
  e.target.style.backgroundColor = 'rgb(255, 255, 0)';
      }
});

2 Answers

Keith Kelly
Keith Kelly
21,326 Points
Keith Kelly
Keith Kelly
21,326 Points

I think in this case the reason you are getting the unexpected token error is because you added a '(' before the 'LI'.

If you remove the parentheses just before the 'LI' on this line, I think that will solve your issue.

if (event.target.tagName == ('LI') {
Rick Buffington
Rick Buffington
8,146 Points
Rick Buffington
Rick Buffington
8,146 Points

You are spot on Keith. I didn't even catch the parenthesis. Good one!

Rick Buffington
Rick Buffington
8,146 Points
Rick Buffington
Rick Buffington
8,146 Points

You are close, but the tagName you are looking for is INPUT not LI. A good way to test this is to add console.log(event.target.tagName); to the code right below section.addEventListener('click', (e) => { and then using Chrome, press F12 and select Console. Whenever you select a text box or click save, it will log the tagName in the Console.

section.addEventListener('click', (e) => {
  // console.log(event.target.tagName);    // UNCOMMENT TO SEE WHAT TAGS ARE BEING SELECTED
  if (event.target.tagName === 'INPUT') {
    e.target.style.backgroundColor = 'rgb(255, 255, 0)';
  }
});