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

Answer & Solution

Answer: Option A
Solution:
Event delegation allows you to attach event handlers to parent elements, which ensures that events on dynamically added elements are captured without needing to bind handlers directly to those elements. This provides consistent handling across dynamic content.
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.

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

A). .bind()

B). .live()

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 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.

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

A). Simplifies event handling by attaching handlers directly to individual elements.

B). Ensures events are captured on dynamically added elements.

C). Increases the complexity of event handling logic.

D). Requires manual refreshing of the page whenever new elements are added.

What happens when an event occurs on a dynamically added element with event delegation?

A). The event bubbles up through the DOM, triggering the event handler attached to the parent element.

B). The event is ignored because it wasn't present in the DOM when the page loaded.

C). The event is captured by the browser's default event handler.

D). The event causes an error because dynamically added elements cannot trigger events.

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.

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.

How does event delegation contribute to better performance in web applications?

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

B). By increasing the number of event handlers attached to individual elements.

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

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

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.