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Support for ECMAScript 6 and 7 #71
Description
This implements features for es 6 & 7.
- const and let
- arrow expressions
- import
- export
- default arguments
- object matching (destructuring, single name bind)
- spread operator
- classes + extends
- template strings
Each of these should be implemented in a separate PR and each item needs tests. There are likely to be three tests needed, one for the appropriate XParser.hs test and one in each if Minify.hs and RoundTrip.hs.
Reacted by Vasiliy Yorkin, Dima, Jordan Mackie, Ilya Chernov, Mark Eibes, Sam A. Horvath-Hunt and wren romano
Reacted by Vasiliy Yorkin, Franco Leonardo Bulgarelli, Andreas Källberg, Mark Eibes and wren romano
Activity
erikd commentedon Jun 17, 2018
constwas already supported andletas added in PR #72.erikd commentedon Jun 17, 2018
Support for the spread operator was added in #73.
erikd commentedon Jun 17, 2018
Arrow expressions were added in #74.
Cmdv commentedon Sep 6, 2018
@erikd would it be ok to work on import and export individually?
I spotted the work was done in the original big PR. Just don't want to do it if you are already working on it 😄
erikd commentedon Sep 7, 2018
Absolutely fine.
Unfortunately, I have not done much more than merge patches for some time.
hdgarrood commentedon Feb 15, 2019
I'd like to pick up where @Cmdv left off on
importparsing.Add support for ES module import statements
Add support for ES module import statements
Add support for ES module import statements
fare commentedon Jun 12, 2019
Also missing, it seems:
{x,y,}x => 42export function f() {}(looks likeexport const f = () => undefinedworks)kl0tl commentedon Jun 16, 2019
Support for unparenthesized single-argument arrow functions was added in #90 and export for function declarations in #88.
jeapostrophe commentedon Sep 11, 2019
const [a, b] = f();is not supported. It should be easy to just change theVariableDeclarationcase to allowArrayLiteraledit: I updated to the last checkout and I think it is now supported.
rhendric commentedon Sep 29, 2019
I knocked off a bunch of the outstanding ES7 items in some work that's now released in 0.6.0.14:
const [a, b] = f()(Add support for destructuring in var declarations #96){[a + b]: c}(Add support for computed property names #99)yield(Add support for generators andyield#105)class,extends,static, andsuper(Add support for classes,superkeyword #108)ronyhe commentedon Mar 8, 2020
Hi all, I'd like to contribute some work here, but I'm unfamiliar with the
!syntax in the AST module: https://github.com/erikd/language-javascript/blob/38e48dd49ccea05675515e8323c0e0035ff97bea/src/Language/JavaScript/Parser/AST.hs#L55Can someone please refer me to an article/explanation?
Thanks in advance!
erikd commentedon Mar 8, 2020
Its a strictness annotation. See eg: https://wiki.haskell.org/Performance/Strictness
Add spread syntax within object literals
georgefst commentedon Sep 24, 2023
Any reason to stop at ES7? I'm personally missing
??and?.wrengr commentedon Mar 24, 2025
I'm personally missing private fields. I'd offer to make a PR for it, but it seems like this project hasn't been touched in years.
erikd commentedon Apr 28, 2025
This is not a package I use any more. I would be happy for anyone to take it over.
Just provide me with your Hackage and Github ids.
feat: add exponentiation operator support to AST and token definitions
feat: implement exponentiation operator lexing and parsing
feat: add exponentiation operator rendering and minification support
test: add comprehensive tests for exponentiation operator
build: update cabal file and add ASI edge case tests