CODEWITHSUNDEEP
javascriptjquerydatejs
Sachin Prasad
Sachin Prasad

Reputation: 5411

Subtracting two times in AM/PM format using javascript

I'm using a date.js plugin to convert my times into date object and then I'm subtracting them.But the result is not valid. My time is in this format 11:00 pm This is what I'm doing:

var tim_i = $('#in_time').val();
var tim_o = $('#out_time').val();
total_tim = "";
if (tim_i && tim_o ){
    d1 = Date.parse(tim_i);
    d2 = Date.parse(tim_o);
    date_diff = new Date(d2 - d1);
    total_tim=date_diff.getHours() + ':' + date_diff.getMinutes();
}

$('#total_time').val(total_tim);

Is there something else I need to do?

Upvotes: 0

Views: 4134

Answers (2)

retype
retype

Reputation: 2385

The TimeSpan class in Datejs might help simplify the problem.

Here's a sample you can run in Firebug that parse the two strings into Date objects, then output the difference in Hours + Minutes.

Example

var d1 = Date.parse("6:30 am");
var d2 = Date.parse("11:00 pm");

var diff = new TimeSpan(d2 - d1);

console.log("Hours: ", diff.hours);
console.log("Minutes: ", diff.minutes);

Hope this helps.

EDIT: You could even simplify into one line if you really want to be terse. 

new TimeSpan(Date.parse("11:00 pm")-Date.parse("6:30 am")).toString("H:mm")

Upvotes: 1

palaѕн
palaѕн

Reputation: 73916

Try this:

var tim_i = new Date($('#in_time').val());
var tim_o = new Date($('#out_time').val());
total_tim = "";
if (tim_i && tim_o) {
    var timeDiff = Math.abs(tim_o.getTime() - tim_i.getTime());
    var getHours = Math.ceil(timeDiff / (1000 * 3600));
    var getMinutes = Math.ceil(timeDiff % (1000 * 60));
    total_tim = getHours + ':' + getMinutes;
}

Upvotes: 0

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