PlainTime.prototype.toString() includes seconds by default. Possible to set smallestUnit: "minutes" as a global default?

[revosw]

In my application, I exclusively work with hours and minutes, never with seconds. My own web APIs take strings in HH:MM form, which means I have to serialize with .toString({ smallestUnit: "minutes" }) all the time.

Is it possible to set a global default? That would make it possible to write code like this:

const appointment = {
  start: Temporal.PlainTime.from("09:00"),
  duration: "PT15M"
}

// 😀 short and sweet
await createAppointment(appointment)
// 🙁 sent to the api: { start: "09:00:00", duration: "PT15M" }

Instead of like this:

// 🙁 long and wordy
await createAppointment({ start: appointment.start.toString({ smallestUnit: "minutes" }), duration: appointment.duration })
// 😀 sent to the api: { start: "09:00", duration: "PT15M" }

[justingrant]

Thanks for the question! No, there is no global default. ECMAScript generally avoids global state, because one user's changes can affect other code.

But here's a few possible ways you could customize things to get what you want:

• You could use a custom JSON.stringify replacer function.
• You could patch Temporal.prototype.toJSON, but there's danger there because if your code calls into other libraries that use Temporal, then your patching could break them.
• You could build an API wrapper

Good luck with your project!

[revosw]

Thanks for the reply! I'll have a look at making an API wrapper of some sort