Anything dynamic - computed - should be in brackets, since that's what that indicates.
Thus, template literals with substitutions must require brackets. Based on sentiments like https://github.com/tc39/ecma262/issues/1399#issuecomment-452910799, either all template literals or none should be permitted in a given position. Thus, no change is possible. On Thu, Nov 7, 2019 at 10:00 AM Alex Kodat <ako...@rocketsoftware.com> wrote: > Thanks Gus, > > Good stuff. Though I think I’d take a different tack on the discussion at > that link, especially as I think the template literals should allow > substitutions (why not?): > > let obj = { `${Date()}`: 1}; > > I guess the tack I would take in the spec would be to add TemplateLiteral > to ComputedPropertyName and not worry about whether or not it's a > NoSubstitutionTemplate. > > Thanks > > ------ > Alex Kodat > Senior Product Architect > Rocket Software > t: +1 781 684 2294 • m: +1 315 527 4764 • w: > http://www.rocketsoftware.com/ > > From: Gus Caplan <m...@gus.host> > Sent: Thursday, November 7, 2019 11:13 AM > To: Alex Kodat <ako...@rocketsoftware.com> > Cc: es-discuss@mozilla.org > Subject: Re: Template literal propery names in object literals > > Related discussion > https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Ftc39%2Fecma262%2Fissues%2F1399&data=02%7C01%7C%7C9e20b9f578574ad67b1308d763a5b814%7C79544c1eed224879a082b67a9a672aae%7C0%7C1%7C637087435736614052&sdata=xDiwNTWHvdfIakrVFe6RmiP5pLHzC0i%2BoRNwKgvTMvc%3D&reserved=0 > > On Thu, Nov 7, 2019 at 8:46 AM Alex Kodat <mailto: > ako...@rocketsoftware.com> wrote: > Just curious. Is there a reason template literals are not allowed as > property names in object literals? I can do: > > let obj = {'foo bar': 1}; > > and > > let obj = {"foo bar": 1}; > > but not > > let obj = {`foo bar`: 1}; > > It doesn't seem that allowing the latter would present any syntactic > problems and seems like almost an oversight that it's not allowed. > > The main reason I ask is that we've gone completely over to using template > literals for all our literals (why not?) and was surprised that we can't > use a template literal as an object literal property name. Obviously, we > can do: > > let obj = {[`foo bar`]: 1}; > > And given that square brackets allow arbitrary expressions for propery > names, it wouldn't seem that supporting template literals for object > literal property names would not present any daunting implementation issues. > > I guess I'd argue that the Principle of Least Astonishment and/or > completeness suggests that JS should support this. > > Sorry if this has been asked before but couldn't find anything in the > archive. > > Thanks > > ------ > Alex Kodat > Senior Product Architect > Rocket Software > t: +1 781 684 2294 • m: +1 315 527 4764 • w: > https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.rocketsoftware.com&data=02%7C01%7C%7C9e20b9f578574ad67b1308d763a5b814%7C79544c1eed224879a082b67a9a672aae%7C0%7C1%7C637087435736623994&sdata=hTNIou6kPg5Ms%2FnIK%2BFVjrWa7mcGDtAbSJrVLVufxQU%3D&reserved=0 > > ================================ > Rocket Software, Inc. and subsidiaries ■ 77 Fourth Avenue, Waltham MA > 02451 ■ Main Office Toll Free Number: +1 855.577.4323 > Contact Customer Support: > https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmy.rocketsoftware.com%2FRocketCommunity%2FRCEmailSupport&data=02%7C01%7C%7C9e20b9f578574ad67b1308d763a5b814%7C79544c1eed224879a082b67a9a672aae%7C0%7C1%7C637087435736623994&sdata=FnuZYm9iu1AHZS4TNuA1TF95h0DzCh1HyF%2FN3CLoQ9M%3D&reserved=0 > Unsubscribe from Marketing Messages/Manage Your Subscription Preferences - > https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.rocketsoftware.com%2Fmanage-your-email-preferences&data=02%7C01%7C%7C9e20b9f578574ad67b1308d763a5b814%7C79544c1eed224879a082b67a9a672aae%7C0%7C1%7C637087435736623994&sdata=xWVTW4Dr2qH1Hfc9woMu1ah6M9AzNcSkVot1y8A9Dmc%3D&reserved=0 > Privacy Policy - > https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.rocketsoftware.com%2Fcompany%2Flegal%2Fprivacy-policy&data=02%7C01%7C%7C9e20b9f578574ad67b1308d763a5b814%7C79544c1eed224879a082b67a9a672aae%7C0%7C1%7C637087435736633951&sdata=X3vLto4DdTHU4roy6wY0Ep%2BXVucGx3v9Dw28KsPzfsg%3D&reserved=0 > ================================ > > This communication and any attachments may contain confidential > information of Rocket Software, Inc. 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