mirror of
https://github.com/danbulant/oxc
synced 2026-05-21 21:29:01 +00:00
9778298fdb
Add class properties transform.
Implementation is incomplete. Notable missing parts:
* Scopes are not updated where property initializers move from class body into class constructor / `_super` function.
* Does not handle binding shadowing problems when property initializers move from class body into class constructor.
* `this` and references to class name in static property initializers need to be transformed to point to a temp var.
* Not all usages of private properties are supported (see below).
* Code which is moved to outside of class body is not transformed by other transforms for class declarations (works OK for class expressions). This includes static property initializers, static blocks, and computed property/method keys.
* Only basic checks for whether computed property/method keys may have side effects.
* Numerous other small issues noted in TODO comments through the code.
### Private properties
Currently does not handle the following usages of private properties:
```js
class Class {
#prop;
static #static;
method() {
object?.#prop;
object?.#prop();
[object.#prop] = [1];
({x: object.#prop} = {x: 1});
object.#prop`xyz`;
object?.#static;
object?.#static();
[object.#static] = [1];
({x: object.#static} = {x: 1});
object.#static`xyz`;
}
}
```
|
||
|---|---|---|
| .. | ||
| snapshots | ||
| src | ||
| tests | ||
| .gitignore | ||
| Cargo.toml | ||
| package.json | ||
| README.md | ||
| update_fixtures.js | ||
Transformation Conformance Test Runner
Execution
This test runner uses the transformation plugin test suite from the Babel repository.
Additional tests are in the tests directory.
The failing test cases are listed in:
To get started, run
cargo run -p oxc_transform_conformance
or watch for changes
just watch 'run -p oxc_transform_conformance'
Options
--filter
To filter for a specific test case, apply the --filter path option, e.g.
cargo run -p oxc_transform_conformance -- --filter react/arrow-functions
--exec
The Babel test suite contains many exec.js files, which need to be executed by a runtime.
bun is the preferred way to execute these tests, which you may install them via https://bun.sh/docs/installation.
Once bun is installed, apply the --exec flag:
cargo run -p oxc_transform_conformance -- --exec
The failing test cases are listed in babel_exec.snap.md.