JavaScript - Mouse & Keyboard Events

Overview

Estimated time: 15–20 minutes

Mouse and keyboard events are essential for interactive web applications. Learn to handle clicks, movement, key presses, and more.

Learning Objectives

• Respond to mouse events (click, dblclick, mouseover, etc.).
• Handle keyboard events (keydown, keyup, keypress).

Prerequisites

• JavaScript - Bubbling, Capturing, Delegation

Mouse Events

element.addEventListener('click', () => alert('Clicked!'));
element.addEventListener('mouseover', () => {/* ... */});

Keyboard Events

document.addEventListener('keydown', function(event) {
  if (event.key === 'Enter') {
    alert('Enter pressed!');
  }
});

Common Pitfalls

• Some keys behave differently across browsers; always test for compatibility.

Summary

Mastering mouse and keyboard events is crucial for building accessible, interactive web apps.