This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The TransitionEvent.transitionName read-only property is a DOMString containing the name of the CSS property associated with the transition.
name = TransitionEvent.transitionName
| Specification | Status | Comment | 
|---|---|---|
| CSS Transitions The definition of 'TransitionEvent.transitionName' in that specification.  |  Working Draft | Initial definition. | 
| Desktop | ||||||
|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | |
| Basic support | Yes | Yes | 4 | 10 | Yes | Yes | 
| Mobile | |||||||
|---|---|---|---|---|---|---|---|
| Android webview | Chrome for Android | Edge Mobile | Firefox for Android | Opera for Android | iOS Safari | Samsung Internet | |
| Basic support | Yes | Yes | Yes | 4 | Yes | Yes | ? | 
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    https://developer.mozilla.org/en-US/docs/Web/API/TransitionEvent/animationName