addInitializer missing on class field decorators

[phiresky]

Describe the bug

function bar(_, ctx) {
  console.log("should not be undefined", ctx.addInitializer);
}
class Foo {
  @bar baz = 1
}


new Foo()

outputs undefined

Input code

function bar(_, ctx) {
  console.log("should not be undefined", ctx.addInitializer);
}
class Foo {
  @bar baz = 1
}


new Foo()

Config

{
  "jsc": {
    "parser": { "syntax": "typescript", "decorators": true },
    "transform": { "decoratorVersion": "2022-03" }
  }
}

Playground link (or link to the minimal reproduction)

https://play.swc.rs/?version=1.3.100&code=H4sIAAAAAAAAAyWNwQrCMBAF7%2FsVj55SkILnIngS%2FApJk60uhF1oEiwV%2F920nmeYmauGIqaY%2FOIeJ4Sy9vgQEEyzJR6SPV2XX1ZThFrBxKgaeRbl2B3%2B4GO8qxTxSTZe%2Fo2RvhSSzxk3syN4bYd22XDBuUEi5fcOXU8%2FkPoNpIUAAAA%3D&config=H4sIAAAAAAAAAz2MwQqEMAxE7%2F2KkLOCdG%2F7Id5LjeDCtmWShRXpvxsRvL1h5s0RiPijmd90OHpoCSq4MrHuxdLfmW1vohlbMx6IF8kVySrUO8NPqA%2B3bUhF14rvffAMZ4FutVxXcYpxnF5M3ZUeejgB%2BD%2B8W4QAAAA%3D

SWC Info output

No response

Expected behavior

addInitializer should be defined on class property decorators as well as .

The same code works on babel and tsc. I thought it was an issue there since the proposal readme says addInitializer does not exist, but apparently the readme is outdated against the actual spec.

Actual behavior

No response

Version

1.3.104

Additional context

https://arai-a.github.io/ecma262-compare/?pr=2417

microsoft/TypeScript#57096

causes mobx to not work with swc: mobxjs/mobx#3817

[nberlette]

This is what's causing the issue right here:

swc/packages/helpers/esm/_apply_decs_2203_r.js

Lines 54 to 56 in 89bd0c8

	if (kind !== 0 /* FIELD */) {
	ctx.addInitializer = createAddInitializerMethod(initializers, decoratorFinishedRef);
	}

[swc-bot]

This closed issue has been automatically locked because it had no new activity for a month. If you are running into a similar issue, please create a new issue with the steps to reproduce. Thank you.