video.js默认一进页面就全屏，为什么报错

Question

var myPlayer = videojs('my-video',{                "autoplay":true,                "isFullscreen":true            });            videojs("my-video").ready(function(){            var myPlayer = this;             myPlayer.play();            myPlayer.enterFullScreen();           document.getElementsByClassName("vjs-progress-control")[0].style.display="none";           });会提示Uncaught TypeError: myPlayer.enterFullScreen is not a function