Durations: Convert HH:MM:SS string to seconds

[hamzahamidi]

Describe the bug
A clear and concise description of what the bug is.
I just wanted to know if it's possible with Dayjs to Convert HH:MM:SS string to seconds. and if it's not possible would you consider implementing this feature? (I'm available for this feature)

The feature can be used like this:

  const duration = dayjs.duration( '02:04:33', 'HH:mm:ss');

and the function would return something like the following:

const d = '02:04:33';   // your input string
const a = hms.split(':'); // split it at the colons

const result = (+a[0]) * 60 * 60 + (+a[1]) * 60 + (+a[2]); 
console.log(result);

[iamkun]

I don't quite understand. Can you please detail what feature do you looking for?

[hamzahamidi]

I want to be able to parse a string HHMMSS and convert it to duration.

[iamkun]

I see. I don't think this is a widely used feature personally.

[jamesastound]

I would use a feature, like this. I develop for a video and audio production environment. Taking human formatted duration inputs and changing them to seconds, for calculation, is a very common task. I find durations most useful when summing (i.e. getting total duration of video clips to see if they will fit on a DVD). Using @hamzahamidi example, it would be helpful to have flexibility in the input format ("HH:mm" or "mm:ss").

    <input class="duration" type="text" value="00:00:05" />
    <input class="duration" type="text" value="00:00:01" />
    <script>
      const total = [...document.querySelectorAll(".duration")]
        .map((time) => time.value)
        .reduce((acc, dur) => acc + dayjs().duration(dur, "HH:mm:ss"), 0);
      console.log(total); // 6
    </script>

Additional duration methods like average, max value, min value, etc, might also be useful.

[coolqingcheng]

I hope to add this feature

[nopol10]

This is definitely useful when dealing with video. The feature is present in momentjs and I only just realized it isn't working after switching to dayjs

[xigolle]

Anybody maybe already found a workaround for this?
Also found out that MomentJs supports this but DayJs unfortunally doesn't.

[Soviut]

I've done the following

const time = '05:22:39'
const [hour, minute, second] = time.split(':').map((t) => parseInt(t))
const duration = dayjs.duration({ hour, minute, second })

The .map() is used to convert each split token to an integer.

[mrleblanc101]

I'm migrating from moment.js and I'm sad to see this feature doesn't exist in dayjs.

In moment you could parse timestring as duration, from the moment.js documentation;

moment.duration('23:59:59');
moment.duration('23:59'); // added in 2.3.0

Dayjs should allow the same thing.
Currently, this does not work in dayjs

dayjs.duration('23:59:59');
dayjs.duration('23:59');

[hamzahamidi]

There is now an open PR addressing this: #3193.

It adds Moment-compatible colon-separated duration string parsing for inputs such as HH:mm, HH:mm:ss, days.HH:mm:ss, fractional seconds, and signed values.