js如何判断video播放的视频内容是已经缓存了的还是新请求的？

Question

js如何判断video播放的视频内容是已经缓存了的还是新请求的？比如clppr.js里面也没有相关的状态判断。// You can either listen some events this wayvar player = new Clappr.Player({  events: {    onReady: function() { ... }, //Fired when the player is ready on startup    onResize: function() { ... },//Fired when player resizes    onPlay: function() { ... },//Fired when player starts to play    onPause: function() { ... },//Fired when player pauses    onStop: function() { ... },//Fired when player stops    onEnded: function() { ... },//Fired when player ends the video    onSeek: function() { ... },//Fired when player seeks the video    onError: function() { ... },//Fired when player receives an error    onTimeUpdate: function() { ... },//Fired when the time is updated on player    onVolumeUpdate: function() { ... },//Fired when player updates its volume  }})// or this wayplayer.on(Clappr.Events.PLAYER_PLAY, function() { ... })

Answer 1

你想新请求就加个时间戳。读缓存会特别快。加载慢一点。如果错误的话，会有error。这样来看的话。设置一个超时间，超过这个时间不报错的就是错误。