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 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.
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.
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 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 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 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.