Modern JavaScript from the Beginning - Second Edition - Event Delegation and Multiple Events

Modern JavaScript from the Beginning - Second Edition - Event Delegation and Multiple Events

Assessment

Interactive Video

Information Technology (IT), Architecture

University

Hard

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The video tutorial explains how to efficiently handle events in JavaScript by using event delegation. Initially, it discusses the inefficiency of adding event listeners to each element individually. It then introduces event delegation, a pattern that allows a single event listener to manage multiple elements by targeting their parent. The tutorial demonstrates how to implement this technique, showing how to add a listener to a parent element and use the event target to identify and manipulate child elements. Advanced uses of event delegation, such as changing styles on mouseover, are also covered.

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3 questions

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1.

OPEN ENDED QUESTION

3 mins • 1 pt

What is the significance of checking the tag name or class of the event target in event delegation?

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2.

OPEN ENDED QUESTION

3 mins • 1 pt

Explain how you can change the style of a list item when hovering over it using event delegation.

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3.

OPEN ENDED QUESTION

3 mins • 1 pt

In the context of the video, what would be a more complex scenario when adding event listeners to buttons?

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