``` function checkFullScreen() { var isFull = document.webkitIsFullScreen || document.mozFullScreen || document.msFullscreenElement || document.fullscreenElement if (isFull == null || isFull == undefined) { isFull = false } return isFull } //使用 window.onresize = function () { if(checkFullScreen()) { console.log('全屏状态') } else { console.log('缩小状态') } } video::-webkit-media-controls-fullscreen-button {display: none;} video::-webkit-media-controls-play-button {} video::-webkit-media-controls-timeline {} video::-webkit-media-controls-current-time-display{} video::-webkit-media-controls-time-remaining-display {} video::-webkit-media-controls-mute-button {} video::-webkit-media-controls-toggle-closed-captions-button {} video::-webkit-media-controls-volume-slider {} ```