☂️ transformer: ES2024 - ES2016

Boshen commented 2 months ago

Need to implement babel plugins equivalent of

2024 features

[x] RegexpSetNotation (See "Regex Features" below) https://github.com/evanw/esbuild/commit/b5ec4057eb8e7897360c80011d5b2f46ddbb58ab

2023 features

[x] Hashbang (syntax)

2022 features

[ ] ClassField https://babel.dev/docs/babel-plugin-transform-class-properties
[ ] ClassPrivateAccessor https://babeljs.io/docs/babel-plugin-transform-private-methods
[ ] ClassPrivateBrandCheck https://babeljs.io/docs/babel-plugin-transform-private-methods
[ ] ClassPrivateField https://babel.dev/docs/babel-plugin-transform-private-property-in-object
[ ] ClassPrivateMethod https://babel.dev/docs/babel-plugin-transform-private-methods
[ ] ClassPrivateStaticAccessor https://babeljs.io/docs/babel-plugin-transform-private-methods
[ ] ClassPrivateStaticField https://babeljs.io/docs/babel-plugin-transform-private-methods
[ ] ClassPrivateStaticMethod https://babeljs.io/docs/babel-plugin-transform-private-methods
[x] ClassStaticBlocks https://babel.dev/docs/babel-plugin-transform-class-static-block
[ ] ClassStaticField https://babeljs.io/docs/babel-plugin-transform-class-properties
[x] TopLevelAwait (syntax)
[ ] ArbitraryModuleNamespaceNames https://github.com/evanw/esbuild/commit/d354bbb39d1ccf3774f5f810cc63d8a0171d3a0f
[x] RegexpMatchIndices (See "Regex Features" below)

2021 features

[x] LogicalAssignment https://babel.dev/docs/babel-plugin-transform-logical-assignment-operators @Dunqing #4890

2020 features

[x] Bigint (syntax)
[x] ExportStarAs (syntax)
[x] ImportMeta (syntax)
[x] NullishCoalescing https://babel.dev/docs/babel-plugin-transform-nullish-coalescing-operator #4884 @Dunqing
[ ] #6958
[ ] TypeofExoticObjectIsObject https://github.com/evanw/esbuild/commit/81215bcac4da6eba4e24cd62341553f0dc93a3c8

2019 features

[x] OptionalCatchBinding https://babel.dev/docs/babel-plugin-transform-optional-catch-binding @Dunqing #4885

2018 features

[ ] AsyncGenerator https://babeljs.io/docs/babel-plugin-transform-async-generator-functions
[ ] ForAwait https://babeljs.io/docs/babel-plugin-transform-async-generator-functions
[ ] #6959
- 3133 covered spread, rest not done yet
[x] RegexpDotAllFlag (See "Regex Features" below)
[x] RegexpLookbehindAssertions (See "Regex Features" below)
[x] RegexpNamedCaptureGroups (See "Regex Features" below)
[x] RegexpUnicodePropertyEscapes (See "Regex Features" below)

Unsupported regular expression literals are transformed into a new RegExp() constructor call so you can bring your own polyfill library to get them to work anyway.

Boshen commented 2 months ago

This is not a good first issue yet.

DonIsaac commented 2 months ago

Can we add CJS to this list too? I need this for oxc-jest.

Boshen commented 2 months ago

Can we add CJS to this list too? I need this for oxc-jest.

CJS is in the milestone https://github.com/oxc-project/oxc/milestone/6

Boshen commented 2 months ago

The list is not that bad actually, we end up with a few groups:

regex features - transform to regex constructor
class stuff - ClassXXX
syntax sugars
Async Generator
Async Await

7086cmd commented 1 month ago

I want to handle the async/await in ES2017. Currently non-arrow function is well transformed in my codebase.

overlookmotel commented 1 week ago

We had OptionalChain ticked off the list as done. But actually it's not done yet!

ObjectRestSpread was also ticked off, but we've only done half of it.

😢

oxc-project / oxc