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 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 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 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.

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.

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 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 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.

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.

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.

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.