JavaScript Fundamentals · DOM · Lesson 25 of 48
Handling Events
Concept
Handling Events
addEventListener lets your code react when a user clicks, types, or otherwise interacts with the page.
You can attach multiple listeners to the same element and the same event without them overwriting each other, unlike setting element.onclick directly.
- Explain the core idea behind Handling Events.
- Predict output before running a change.
- Test one realistic and one unusual input.
- Use the result to make the next decision.
- 1. Read one concept.
- 2. Change the example.
- 3. Run, compare, and explain.
- 4. Complete the challenge below.
Self-check before continuing
Without looking at the example, describe what changes when you modify one input in Handling Events. Then reopen the editor and prove your explanation with a small test.
You are ready to continue when you can predict, test, and explain the result.
Your turn
Write an event listener that logs a message when a button with id "submit" is clicked.
Ask about this lesson or your next move. The guide explains the path without taking the work away from you.
Ready for the next lesson?
Mark this lesson complete when you have finished the exercise.
Console