获取当前时间戳:
<!DOCTYPE html>
<html>
<head><title></title>
</head>
<body></body>
</html>
<script type="text/javascript">//获取当前时间戳let a=new Date().getTime();let b=new Date()*1;let c=Date.now();let d=+new Date();console.log(a,b,c,d)//1597930959054 1597930959054 1597930959054 1597930959054
</script>