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

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.

How does event delegation help in handling dynamically added DOM elements?

A). By attaching event handlers to parent elements, ensuring consistent handling.

B). By removing event handlers from the DOM altogether.

C). By binding event handlers directly to dynamically added elements.

D). By refreshing the page whenever new elements are added.

What is the purpose of using event delegation?

A). To handle events on elements that are dynamically added to the DOM.

B). To prevent events from bubbling up the DOM tree.

C). To trigger events programmatically.

D). To remove events from the DOM completely.

What is event delegation in JavaScript/jQuery?

A). A technique for handling events on dynamically added DOM elements.

B). A method to delegate event handling to parent elements.

C). A way to trigger events manually in jQuery.

D). A mechanism to prevent event propagation in JavaScript.

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 do you specify the child elements to which the event should be delegated in jQuery?

A). By providing a CSS selector for the child elements.

B). By listing the child elements explicitly.

C). By using regular expressions to match child elements.

D). By specifying the child elements' IDs.

How do you attach an event handler to dynamically added elements using event delegation?

A). By attaching the event handler to a parent element using .on() with a child selector.

B). By attaching the event handler directly to the dynamically added elements.

C). By using the .trigger() method on the parent element.

D). By manually refreshing the page every time new elements are added.

Which jQuery method is commonly used for event delegation?

A). .on()

B). .click()

C). .delegate()

D). .trigger()

How does event delegation simplify event handling in web development?

A). By attaching event handlers to parent elements instead of individual elements.

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

C). By removing events from the DOM altogether.

D). By triggering events programmatically.

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.