日期差异Javascript [英] Date diff Javascript
本文介绍了日期差异Javascript的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
你好我们刚刚学习Js，我有一个问题，差异两个约会。我想计算当前日期和日历之间的差异。用户应在日历上选择日期。我的简单代码如下所示，我需要通过所有回复来改进它。
Hello guys I am just learning Js and I have a problem that differences two date. I want to calculate differences between current date and any date from calender. User should select date whatever you want on calender. My simple code following and I need to improve it thanks for all response.
<!DOCTYPE html>
<html>
<head>
<title>Page Title</title>
<script>
var selectedDateFromCalendar = new Date();
selectedDateFromCalendar = document.getElementById('mydate').value;
var currentdate = new Date();
currentdate = document.getElementById("current").value;
var diff = selectedDateFromCalendar - currentdate ;
alert(diff);
</script>
</head>
<body>
<p id="current"></p>
<input type="date" id="myDate">
</body>
</html>
推荐答案
哪里有一些错误，我把它们都修好了：
There where quite some mistakes, I fixed them all here:
如果您无法理解其中的一部分，请随时发表评论。
If you can't understand some of this please feel free to leave a comment.
<!DOCTYPE html>
<html>
<head>
<title>Page Title</title>
</head>
<body>
<p id="current">2015-12-20</p>
<input type="date" id="myDate" value="2015-12-25">
<script>
document.getElementById('myDate').onchange = function() {
var selectedDateFromCalendar = this.value;
var currentdate = new Date();
document.getElementById("current").textContent = currentdate.toUTCString();
var diff = new Date(selectedDateFromCalendar) - currentdate;
var days = diff / 1000 / 60 / 60 / 24
alert(days + " days"); // or use Math.floor(days)
}
</script>
</body>
</html>
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