This is an experimental technologyCheck the Browser compatibility table carefully before using this in production.
The transitionstart
event is fired when a CSS transition has actually started, i.e., after any transition-delay
has ended.
Bubbles | Yes |
Cancelable | No |
Interface | TransitionEvent
|
Event handler property | GlobalEventHandlers.ontransitionstart
|
The original target for this event is the Element
that had the transition applied. You can listen for this event on the Window
interface to handle it in the capture or bubbling phases. For full details on this event please see the page on HTMLElement: transitionstart.
Examples
This code adds a listener to the transitionstart
event:
window.addEventListener('transitionstart', () => {
console.log('Started transitioning');
});
The same, but using the ontransitionstart
property instead of addEventListener()
:
window.ontransitionrun = () => {
console.log('Started transitioning');
};
See a live example of this event.
Specifications
Specification | Status | Comment |
---|---|---|
CSS TransitionsThe definition of 'transitionstart' in that specification. | Working Draft | Initial definition. |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
transitionstart event
|
Chrome
No support No |
Edge
No support No |
Firefox
Full support 53 |
IE
? |
Opera
? |
Safari Full support 13.1 Full support 13.1 Full support 12 Disabled' From version 12: this feature is behind the |
WebView Android
No support No |
Chrome Android
No support No |
Firefox Android
Full support 53 |
Opera Android
? |
Safari iOS Full support 13.4 Full support 13.4 Full support 12 Disabled' From version 12: this feature is behind the |
Samsung Internet Android
No support No |
Legend
- Full support
- Full support
- No support
- No support
- Compatibility unknown
- Compatibility unknown
- User must explicitly enable this feature.'
- User must explicitly enable this feature.
See also
- The
GlobalEventHandlers.ontransitionstart
event handler - The
TransitionEvent
interface - CSS properties:
transition
,transition-delay
,transition-duration
,transition-property
,transition-timing-function
- Related events:
transitionend
,transitionrun
,transitioncancel
- This event on
HTMLElement
targets:transitionstart
- This event on
Document
targets:transitionstart
Window: transitionstart event by Mozilla Contributors is licensed under CC-BY-SA 2.5.