计算两个日期之间的百分比

Question

I want to calculate between two dates difference to percent. Only not date, hours needed to scale. Example:

22-08-2017 09:00 start date,
30.09.2017 22:00 finish date,

The today date is 01.09.2017. When I look to system today, the application show to me "%47 percent completed" I want to this.

Answer 1

function getpercent(){
var strt = new Date(document.getElementById('start').value).getTime();

var end = new Date(document.getElementById('end').value).getTime();

var current = new Date(document.getElementById('current').value).getTime();

var completed = ((current - strt) / (end - strt)) * 100;
document.getElementById('percent').innerHTML = completed+"%";
 }

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<p>start <input id="start" type="date" /></p>
<p>end <input id="end" type="date" /></p>
<p>current <input id="current" type="date" /></p>
<p>percent   <span id="percent"></span></p>
<button onclick="getpercent()">get percent</button>

new Date() will take a date string and turn it into unix standard time as seconds.

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