修复The play() request was interrupted等系列问题

1. 问题

在网页端播放媒体，如video、audio等标签，在频繁切换组件播放时经常出现The play() request was interrupted 等错误提示，
比如Uncaught (in promise) DOMException: The play() request was interrupted by a call to pause()或者Uncaught (in promise) DOMException: The play() request was interrupted by a new load request。

2. 原因

不管是移除还是暂停等等错误，都是组件切换的时候play是异步的过程，所以需要延时执行操作。

3. 修复方式

this.timer = setTimeout(() => {
    this.video && this.video.play();
},500);

经过多次试验，定时操作设置500毫秒一般不再报错。

当然，别忘了组件销毁时需要移除定时器，比如

export default {
	beforeDestroy() {
		clearTimeout(this.timer);
	}
}