答案是：蓋不住。
唯有曲線救國配喳，video使用流式布局飘诗，將video的父元素進行全屏處理，之后就可以愉快地往視頻上面蓋東西了界逛。
// 兼容請求視頻全屏
function requestFullscreen(elem) {
if (elem.requestFullscreen) {
elem.requestFullscreen();
} else if (elem.msRequestFullscreen) {
elem.msRequestFullscreen();
} else if (elem.mozRequestFullScreen) {
elem.mozRequestFullScreen();
} else if (elem.webkitRequestFullscreen) {
elem.webkitRequestFullscreen();
} else {
console.error('requestFullScreen is not exist in target');
}
}
// 用于兼容請求退出全屏
function exitFullscreen(): void {
const _document: any = document;
if (_document.exitFullscreen) {
_document.exitFullscreen();
} else if (_document.msExitFullscreen) {
_document.msExitFullscreen();
} else if (_document.mozCancelFullScreen) {
_document.mozCancelFullScreen();
} else if (_document.oRequestFullscreen) {
_document.oCancelFullScreen();
} else if (_document.webkitExitFullscreen) {
_document.webkitExitFullscreen();
}
}
