Can't create 0-time Duration with constructor or .from()

[justinfagnani]

I need to create a 0-time Duration for some testing purposes. I don't see anything in the Temporal proposal docs on Duration that seem to prevent this, but it doesn't seem possible in the current polyfill.

If I pass an empty object to .from() I get the error "invalid duration-like". If I pass no arguments to the constructor, or 0 or pass an a 0-valued property to .from(), like .from({minutes: 0}) I get the error "mixed-sign values not allowed as duration fields".

[justingrant]

Hmm, could you provide a public repro case for this? I cannot repro the problem you're seeing. None of the code below (from this codesandbox) throws exceptions with version 0.4.2 of this polyfill.

import { Temporal } from "@js-temporal/polyfill";

Temporal.Duration.from("PT0S");
new Temporal.Duration(0);
Temporal.Duration.from({ minutes: 0 });
Temporal.Duration.from({ seconds: 0 });
Temporal.Duration.from({ minutes: -1, seconds: 0 });
Temporal.Duration.from({ minutes: 1, seconds: 0 });

The only time you should see the exception complaining about mixed signs would be if you try to do something like this:

Temporal.Duration.from({ minutes: -1, seconds: 1 });