Q
Which jQuery method is commonly used for event delegation?

Answer & Solution

Answer: Option B
Solution:
The .on() method in jQuery is commonly used for event delegation. It allows you to attach an event handler function for one or more events to selected elements, including those that are dynamically added to the DOM.
Related Questions on Average

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.

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.

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.

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 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.

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

A). .bind()

B). .live()

C). .delegate()

D). .trigger()

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.

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.

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 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.