<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
<audio src=""></audio>
<video width="600" src="./video/video.mp4"></video>
<div id="controls">
<button>播放</button>
<button>暂停</button>
<button>+</button>
<button>-</button>
</div>
<script>
var volumeBigger = false;
var videoElement = document.getElementsByTagName("video")[0];
var btns = document.getElementsByTagName("button");
btns[0].οnclick=function(){
videoElement.play();
}
btns[1].οnclick=function(){
videoElement.pause();
}
btns[2].οnclick=function(){
console.log(videoElement.volume)
if(videoElement.volume<=0.9&&videoElement.volume>=0){
videoElement.volume += 0.1
}else{
videoElement.volume==1
}
}
btns[3].οnclick=function(){
console.log(videoElement.volume)
if(videoElement.volume>=0.1&&videoElement.volume<=1){
videoElement.volume -= 0.1
}else{
videoElement.volume==0
}
}
</script>
</body>
</html>
