235287 2022-01-16 23:00:43 -0800 MediaSession coordinator setTrack API not works 2022-01-18 08:28:16 -0800 1 1 1 Unclassified WebKit Media Safari 15 Mac (Intel) macOS 12 NEW InRadar P2 Normal --- 1 cammy.tang webkit-unassigned eric.carlson jer.noble webkit-bug-importer oldest_to_newest 1831404 0 cammy.tang 2022-01-16 23:00:43 -0800 Issue: When Shareplay between macOS safari and iOS native APP, Can't receive "settrack" action from native APP, also can't receive from our own website. Sample Code in our website: //Action handlers navigator.mediaSession.setActionHandler('play', () => {//work player.play(); }); navigator.mediaSession.setActionHandler('pause', () => {//work player.pause(); }); navigator.mediaSession.setActionHandler('settrack', (details) => {//NOT work const nextVideo = details.trackIdentifier; playNext(nextVideo); }); //produce setTrack action when user click next item. navigator.mediaSession.coordinator.setTrack(playing.seoName); Business scene: When user switch video A to video B on Safari,we intend to produce action 'setTrack' to inform iOS APP to sync switch. Otherwise,if user switch on APP, we receive and handle "settrack" action to sync on our website. 1831685 1 webkit-bug-importer 2022-01-18 08:28:16 -0800 <rdar://problem/87712870>