Proposal-temporal: Accept Date.toString() output in from()?
From @jasonwilliams in https://github.com/tc39/proposal-temporal/pull/366:
Do we want to give more detail here on what the string should/should not be?
Is it just an ISO 8601 string? the output from Date() also?
See the format described in https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/toString. (Although note it was implementation-dependent before ES2018.)
ptomato
All 5 comments
@gibson042 has done a lot of work in this area, and is the one who wrote the new spec for Date.prototype.toString. He attempted to do a similar thing with Date.parse, but that failed at plenary because all the browsers had different behavior and the implementations didn't want to change.
sffc
on 18 Feb 2020
I would not require acceptance of Date.prototype.toString output, which is nonstandard outside ECMAScript and includes implementation-defined contents after the UTC offset, and is not even necessarily accepted by legacy Date.parse (which violates a "should" requirement in the spec, but is nonetheless web reality). The interchange-friendly format is available via Date.prototype.toISOString, and that should be enough.
gibson042
on 18 Feb 2020
Agreed @gibson042 we should have a cookbook example showing how to do this, as i imagine a common question will be "how to switch between the old and the new".
jasonwilliams
on 21 Feb 2020
jasonwilliams
on 24 Feb 2020
We have the cookbook example now, so closing this.
ptomato
on 15 Apr 2020
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Most helpful comment
I would not require acceptance of
Date.prototype.toStringoutput, which is nonstandard outside ECMAScript and includes implementation-defined contents after the UTC offset, and is not even necessarily accepted by legacyDate.parse(which violates a "should" requirement in the spec, but is nonetheless web reality). The interchange-friendly format is available viaDate.prototype.toISOString, and that should be enough.