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

Juan Diaz
Juan Diaz
7,661 Points

I can't get this event to work properly. Please help!

I'm trying to fire the event ONLY when the '<input type="text"> ' elements inside of the <section> are clicked on so they change color (r,g,b).

I've tried the following. Selecting the ul first. Then, e.target.nodeName to check if the node that was clicked on is an input, but that won't work.

It may be simpler than I think it is, but I can't grasp what's going on under the hood.

Any suggestions would be of great help. Thank you!

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')[0];

section.addEventListener('click', (e) => {
  let ul = document.getElementsByTagName('ul')[0];
  if( e.target.nodeName == 'input'){
      e.target.style.backgroundColor = 'rgb(255, 255, 0)';
  }
});

1 Answer

Steven Parker
Steven Parker
231,271 Points

You're pretty close, but:

  • the property that indicates the type of element is "tagName"
  • tag names are always stored in all uppercase
Juan Diaz
Juan Diaz
7,661 Points

WOW! Excellent! thanks a lot. You were right all along!