Question

Sometimes you want to do something once an effect is complete. For example, suppose when a photo fades into view, you want the caption to appear. The caption will appear after the photo finishes fading into view. We can pass a callback function to any effect. That's a function that runs only after the effect is completed. O True O False

Answer 1

It is true. You want the caption to show up as the image fades into view. After the image has fully faded into view, the caption will be displayed. A callback function can be passed to any effect.

The primary plan was to gradually fade out the picture element before changing its source to point to the following image and then gradually bringing it back. Sounds simple, no? Yes, but nothing waits until the timer inside of fadeOut expires.

Instead, the fade-in function is used, which breaks up the transition by causing flickering pictures as both functions attempt to change the new image's opacity. We anticipate that such operations will be asynchronous and gracefully await the conclusion of the preceding timer.

When used back-to-back, as I did, those two functions operate flawlessly when they are each triggered by a different event, but they flicker and fail to perform as intended.

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