Find the difference of date type in JavaScript, increase/decrease S/min/h/Tian Deng

Recently, time is required to add and subtract operations, in the past need to take out specific time and then add and subtract, but also consider the rounding problem is very troublesome

　　Reprint Please specify source: http://www.cnblogs.com/zaiyuzhong/p/date-operator-in-javascript.html

Looked at the date object of W3school, found that there are gettime () and SetTime () two methods, very convenient. Here's how to use it:

Calculates the difference between two date objects: D1.gettime ()-D2.gettime ()

+1s:d1.settime (D1.gettime () + 1 * 1000)

+1min:d1.settime (D1.gettime () + 1 * 60 * 1000)

Other slightly ...

It is important to note that the two method return values are the number of milliseconds from midnight January 1, 1970 to the Date object

Find the difference of date type in JavaScript, increase/decrease S/min/h/Tian Deng