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I found the transition end events, but I need a transition start event. Is there such thing?
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Triggering transitions You can trigger CSS transitions directly with pseudo classes like :hover (activates when the mouse goes over an element), :focus (activates when a user tabs onto an element, or when a user clicks into an input element), or :active (activates when user clicks on the element).
The transitionend event is fired when a CSS transition has completed. In the case where a transition is removed before completion, such as if the transition-property is removed or display is set to none , then the event will not be generated.
CSS transitions provide a way to control animation speed when changing CSS properties. Instead of having property changes take effect immediately, you can cause the changes in a property to take place over a period of time.
The transitionend event occurs when a CSS transition has completed. Note: If the transition is removed before completion, e.g. if the CSS transition-property property is removed, the transitionend event will not fire. For more information about CSS Transitions, see our tutorial on CSS3 Transitions.
No, not yet. (reiterating @Frédéric Hamidi's comment.)
Consider broadcasting your own event with an event aggregator, mediator, or pub/sub. These all mean basically the same thing: Instead of waiting for JavaScript's DOM/CSS event specs to catch up with your needs, make your own global/near-global event management system, or use custom events in whatever event framework you're already using.
For example, you can use custom jQuery events:
// Transition target (body, for example) var $body = jQuery(document.body); // Register our transition starting function (left as exercise) $body.on('transition_start', startFunction); // Start the transition... $body.addClass('transitioning') // ... and let everyone know .trigger('transition_start');` If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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