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Event Handling is the process of responding to user actions on a webpage.
Common events:
3 Steps:
Basic Code Example
| let btn = document.querySelector("button"); btn.addEventListener("click", () => { alert("Button Clicked!"); }); |
Technical Example
| document.querySelector("input").addEventListener("input", (e) => { console.log(e.target.value); }); |
1. Add to Cart Click
User clicks button → product added
| btn.addEventListener("click", addToCart); |
2. Typing in Search Bar
Every keystroke triggers event
| input.addEventListener("input", searchFunction); |
3. Form Submission
| form.addEventListener("submit", (e) => { e.preventDefault(); }); |
Prevents page reload & handles data
What is an event object?
Contains details about the event (target, type, key, etc.)
How to stop propagation?
| e.stopPropagation(); |
“Event handling allows JavaScript to respond to user interactions like clicks, typing, and submissions to make web pages interactive.”
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What is Event Handling?
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