Q
What is the primary advantage of using event delegation in web development?

Answer & Solution

Answer: Option B
Solution:
The primary advantage of event delegation is that it ensures events are captured on dynamically added elements, simplifying event handling and improving code maintainability.
Related Questions on Average

What happens if the parent element specified for event delegation is removed from the DOM?

A). The event delegation mechanism will no longer work for child elements.

B). The child elements will inherit the event handlers of the parent element.

C). The child elements will trigger the event handlers directly.

D). The event will be captured by the browser's default event handler.

How does event delegation help in handling events on dynamically added table rows?

A). By attaching event handlers to the parent table element.

B). By attaching event handlers directly to the dynamically added table rows.

C). By manually refreshing the page whenever new rows are added.

D). By using regular expressions to match table rows.

What is the syntax for using event delegation with jQuery's .on() method?

A). $(parentElement).on(eventType, childSelector, eventHandler);

B). $(childElement).on(eventType, parentSelector, eventHandler);

C). $(parentElement).delegate(eventType, childSelector, eventHandler);

D). $(childElement).delegate(eventType, parentSelector, eventHandler);

Which jQuery method is deprecated in favor of .on() for event delegation?

A). .bind()

B). .live()

C). .delegate()

D). .trigger()

Which jQuery method provides better performance for event delegation: .on() or .click()?

A). .on()

B). .click()

C). Both methods provide similar performance.

D). It depends on the browser being used.

How does event delegation help in improving code maintainability?

A). By reducing the number of event handlers attached to individual elements.

B). By increasing the complexity of event handling logic.

C). By requiring manual refreshing of the page whenever new elements are added.

D). By making it easier to trigger events programmatically.

In event delegation, which element's event handler is triggered when an event occurs?

A). The parent element's event handler.

B). The child element's event handler.

C). The event handler of the first ancestor element.

D). The event handler of the last ancestor element.

Which scenario is suitable for using event delegation?

A). When dealing with dynamically added elements or a large number of elements.

B). When events need to be triggered manually.

C). When events should be prevented from bubbling up the DOM tree.

D). When there is a need to remove events from the DOM altogether.

When is event delegation particularly useful in web development?

A). When events need to be triggered programmatically.

B). When dealing with a static DOM structure.

C). When handling events on elements that are dynamically added or removed.

D). When preventing events from bubbling up the DOM tree.

What is the advantage of using event delegation in single-page applications (SPAs)?

A). It ensures that events are captured on dynamically generated content.

B). It allows events to be triggered programmatically.

C). It prevents events from bubbling up the DOM tree.

D). It requires fewer resources compared to traditional web applications.