How can you monitor the precise start and end of CSS3 transitions?

CSS3 Transition Events: Monitoring Transitions with Precision

Question: How can you determine precisely when a CSS3 transition starts or ends?

Answer:

The completion of a CSS transition triggers a corresponding DOM event. Each property undergoing transition generates an individual event. This mechanism enables developers to synchronize actions with the transition's completion.

Browser-Specific Events:

• W3C: Completion of transition fires the 'transitionend' event.
• Webkit: 'webkitTransitionEnd' event signals the end of a transition.
• Mozilla: 'transitionend' event occurs at the completion of transitions.
• Opera: 'oTransitionEnd' event marks the conclusion of the transition.
• Internet Explorer: 'transitionend' event triggers upon the transition's completion.

Example Implementation:

To monitor a transition's completion in Webkit, use the following code:

box.addEventListener( 'webkitTransitionEnd',
    function( event ) {
        console.log( "Finished transition!" );
    }, false );

Note:

The availability and behavior of transition events can vary across browsers. Hence, it is essential to consider browser compatibility when using these events.

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