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<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<title>Document</title>
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<body>
<script>
var date=new Date(); //声明
console.log(date.getTime());
console.log(date.valueOf()); //得到距离1970年的毫秒数
//直接使用
console.log(Date.now());
console.log(+new Date());
</script>
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