This is an experimental technologyCheck the Browser compatibility table carefully before using this in production. The TransitionEvent.pseudoElement read-only property is a DOMString, starting with '::', containing the name of the pseudo-element the animation runs on. If the transition doesn't run on a pseudo-element but on the element, an empty string: ''. Syntax name = TransitionEvent.pseudoElement Specifications Specification Status Comment CSS TransitionsThe definition of 'TransitionEvent.pseudoElement' 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. Desktop Mobile FeatureChromeEdgeFirefoxInternet ExplorerOperaSafariBasic support Yes No23 No Yes NoFeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung InternetBasic support Yes Yes No23 Yes No ?DesktopMobileChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung InternetBasic support ExperimentalChrome Full support YesEdge No support NoFirefox Full support 23IE No support NoOpera Full support YesSafari No support NoWebView Android Full support YesChrome Android Full support YesEdge Mobile No support NoFirefox Android Full support 23Opera Android Full support YesSafari iOS No support NoSamsung Internet Android ? Legend Full support Full support No support No support Compatibility unknown Compatibility unknownExperimental. Expect behavior to change in the future.Experimental. Expect behavior to change in the future. See also Using CSS transitions transition, transition-delay, transition-duration, transition-property, transition-timing-function.