Handling Events
Explore how to handle user interactions in web development by attaching event listeners with addEventListener, managing event propagation through bubbling and capturing, and efficiently using event delegation for dynamic elements. Understand the event object and learn to prevent default browser behaviors to build engaging and responsive web applications.
Events in the DOM represent interactions like clicks, keypresses, or mouse movements. Using JavaScript, we can respond to these events dynamically.
Adding event listeners
The addEventListener() method attaches an event handler to an element without overwriting existing listeners.
The above JS code adds a click event listener to a button. When the button is clicked, a message is logged to the console.
Handling user actions
Event listeners can respond to a variety of user actions:
The above JS code logs the key pressed by the user in an input field.
Other commonly used events include:
click: Triggered when an element is clicked.mouseover: Triggered when the mouse hovers over an element.keydown...