Optional Chaining: Stage 1 #328

Activity

1. danez

   added

   help wanted

   spec-new

   on Jan 27, 2017
2. gisenberg commented on Jan 30, 2017

   

   gisenberg

   on Jan 30, 2017

   Member

   More actions

   Thanks for looping me in! I wanted to let everyone know that I'm over in the BabelJS Slack if there are others that would like to discuss this feature further. I'm currently working with @bmeck on the Babel side of things.
3. kristofdegrave commented on Feb 11, 2017

   

   kristofdegrave

   on Feb 11, 2017

   More actions

   I'm currently werking on An PR for this

   👍React with 👍38Reacted by Aleksey Bobyr, Bitcollage, Alex, Florian Reuschel, maevic, octalmage, Tomas Šereikis, Jason Merino, mantou, J. Pratt-Delzenne and 28 more

   😄React with 😄4Reacted by The web walker, Tanner Linsley, Collin Sauve and Mani Shooshtari

   🎉React with 🎉21Reacted by Bitcollage, maevic, Jason Merino, Thomas Sileghem, Christian Silver, Sam Horton, Nathan Hagen, guijesuis, Leonard Koch, テンプテーション and 11 more

   ❤️React with ❤️7Reacted by Andy, The web walker, Dale Inverarity, Tanner Linsley, Collin Sauve, Titus Woo and Mani Shooshtari
4. kristofdegrave

   added a commit that references this issue on Feb 11, 2017

   babel#328 babel#205 ?. as nullPropagation. For now it only works for …

   ...

   1eaf016
5. sunnylqm commented on Mar 14, 2017

   

   sunnylqm

   on Mar 14, 2017

   More actions

   Any news? @kristofdegrave

   👍React with 👍6Reacted by Sam Horton, Nicky Hajal, Alexey Platov, Aleksey Bobyr, Thomas Schaaf and Andy
6. rattrayalex commented on Mar 16, 2017

   

   rattrayalex

   on Mar 16, 2017

   Last edited by rattrayalex

   Contributor

   More actions

   As discussed in the babel slack, I'm also interested in contributing to this once the spec is a bit more settled.

   I previously implemented a ?. feature for LightScript (a fork/superset of JS built on babylon/babel). In case it helps anyone, here is:

   • The babel transform
   • The associated tests
   • The commit adding the feature to the lightscript parser (a fork of babylon). It uses poor naming ("elvis operator" isn't accurate) and isn't backwards-compatible; a different approach would be necessary.

   My version doesn't currently support assignments or delete, though I may add those soon.

   For now I'll wait for a bit to hear back from @kristofdegrave and the babel team as to whether the spec seems stable.

   👍React with 👍7Reacted by Alex, Dima Khadorkin, Sam Horton, Rodrigo Nascimento, Nicky Hajal, Eric Miller and Michael Taylor
7. cusspvz commented on Mar 31, 2017

   

   cusspvz

   on Mar 31, 2017

   More actions

   Can't wait to see this on ES. Inspite of it being yet at stage-1, it is the only thing that I've always wanted to be part of EcmaScript since I stopped using CoffeeScript. I wish I had spare time to implement it.

   👍React with 👍26Reacted by Nicky Hajal, Sam Horton, Alexander Gusman, Alexey Platov, Jean-Philippe Tissot, Seol Park, szabi, Jake Klingler, Chang Wang, 文宇祥 and 16 more
8. thomaschaaf commented on May 24, 2017

   

   thomaschaaf

   on May 24, 2017

   More actions

   @gisenberg @kristofdegrave is this still something you are working on? Do you need help?
9. hzoo

   changed the title [-]Null Propagation Operator: Stage-1[/-] [+]Null Propagation Operator: Stage 1[/+] on May 26, 2017
10. xtuc commented on May 26, 2017

    

    xtuc

    on May 26, 2017

    Member

    More actions

    Based on @kristofdegrave's work, I can make a PR with this master...xtuc:feat-optional-chaining

    I have the Babel part as well babel/babel@7.0...xtuc:feat-optionnal-chaining

    I currently only support the basic syntax:

    a?.b = 42
    delete a?.b
    foo?.bar()

    👍React with 👍7Reacted by The web walker, Maxim Vorobjov, Alexandre Borela, José Moreira, David Yahalomi, Thomas Schaaf and Ali Torki

    🎉React with 🎉1Reacted by Ali Torki
11. gisenberg commented on May 26, 2017

    

    gisenberg

    on May 26, 2017

    Member

    More actions

    @thomaschaaf This is still underway. If you're interested in helping, https://github.com/gisenberg/proposal-optional-chaining is tracking the remaining work. I'm also in the BabelJS Slack if you want to reach out directly.
12. hzoo commented on May 27, 2017

    

    hzoo

    on May 27, 2017

    MemberAuthor

    More actions

    @xtuc, @kristofdegrave Let's start the PR so we can make a review by us + Gabe?
13. hzoo

    added

    Has PR

    on May 28, 2017
14. hzoo

    changed the title [-]Null Propagation Operator: Stage 1[/-] [+]Optional Chaining: Stage 1[/+] on May 30, 2017
15. hzoo

    assigned

    gisenberg

    on Jun 3, 2017
16. hzoo commented on Jun 5, 2017

    

    hzoo

    on Jun 5, 2017

    Last edited by hzoo

    MemberAuthor

    More actions

    The babylon PR is merged (#545)

    Please help review/test the transform PR babel/babel#5813
17. littledan commented on Jun 6, 2017

    

    littledan

    on Jun 6, 2017

    More actions

    For context, at the TC39 meeting where this proposal was presented, there were a couple concerns raised about the scope of the proposal, one syntactic and one semantic. I've filed two issues to discuss these issues. This is a Stage 1 feature and subject to change!

    👍React with 👍3Reacted by Henry, Vaughan Rouesnel and cybai (Haku)
18. sunnylqm commented on Jul 4, 2017

    

    sunnylqm

    on Jul 4, 2017

    More actions

    https://github.com/babel/babel/tree/7.0/packages/babel-plugin-transform-optional-chaining

    🎉React with 🎉18Reacted by Florian Reuschel, Maxim Vorobjov, Mistereo, Nicholas R, Vaughan Rouesnel, c4605, Sven Sauleau, The web walker, Kav Singh, David Yahalomi and 8 more
19. xtuc

    closed this as completedon Jul 4, 2017