js date_function.html

<!doctype html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>date_function</title>
    </head>
    <body>
        <script>
            function testDate(){
                var date = new Date();
                var myDate = new Date("2017/12/25 17:00:00");
                console.log(date);
                // Mon Oct 08 2018 15:53:36 GMT+0800 (中国标准时间)
                console.log(myDate);
                // Mon Dec 25 2017 17:00:00 GMT+0800 (中国标准时间)
            }

            function testFor(){
                var start = new Date();
                //查看打印1-10000所有的数字用了多少时间
                for(var i=1;i<=10000;i++){
                    console.log(i);
                }
                var end = new Date();
                var duration = end.getTime() - start.getTime();
                console.log("共花费"+duration+"毫秒");
                // 共花费1695毫秒
            }
        </script>
        <button onclick="testDate()">testDate</button>
        <button onclick="testFor()">testFor</button>
    </body>
</html>

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转载自blog.csdn.net/weixin_42193179/article/details/88988723