How can I calculate the time between 2 Dates in typescript

Question

This works in Javascript  new Date  -new Date  2013-02-20T12 01 04 753Z     But in typescript I can t rest two new Dates  Date  2013-02-20T12 01 04 753Z     Don t work because paremater not match date signature

User · Answer

This is how it should be done in typescript:

(new Date()).valueOf() - (new Date("2013-02-20T12:01:04.753Z")).valueOf()

Better readability:

      var eventStartTime = new Date(event.startTime);
      var eventEndTime = new Date(event.endTime);
      var duration = eventEndTime.valueOf() - eventStartTime.valueOf();

User · Answer

In order to calculate the difference you have to put the   operator   that way typescript converts the dates to numbers    new Date  -  new Date  2013-02-20T12 01 04 753Z     From there you can make a formula to convert the difference to minutes or hours

User · Answer

Use the getTime method to get the time in total milliseconds since 1970-01-01  and subtract those   var time   new Date   getTime   - new Date  2013-02-20T12 01 04 753Z   getTime

User · Answer

TypeScript  const today   new Date    const firstDayOfYear   new Date today getFullYear    0  1       Explicitly convert Date to Number const pastDaysOfYear     Number today  - Number firstDayOfYear

User · Answer

It doesn t work because Date - Date relies on exactly the kind of type coercion TypeScript is designed to prevent   There is a workaround this using the   prefix   var t   Date now   -   new Date  2013-02-20T12 01 04 753Z      Or  if you prefer not to use Date now     var t     new Date    -   new Date  2013-02-20T12 01 04 753Z       See discussion here   Or see Siddharth Singh s answer  below  for a more elegant solution using valueOf

[date] How can I calculate the time between 2 Dates in typescript

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