Missing transformations for Stage 3 syntax

[MatteBailey]

The README states that this preset contains transformation for all stage 3 syntax, but I noticed that @babel/plugin-proposal-class-properties, for example, is not included here. Is this intentional, or has it just not been added yet?

Sorry for the second issue in one day, and thanks!

[ljharb]

This is intentional; we also use our shared eslint config, which uses eslint's default parser, which only supports stage 4 syntax.

When we support class fields in our style guide, we'll also support it here.

[MatteBailey]

That makes sense. This was the line that confused me:

Currently contains transforms for all standard syntax that is stage 4 (ES2018) or stage 3, except for the following:

Is "standard syntax" the key part there, and why class fields are not supported? From reading that, it's not very clear to me what stage 3 features I can expect to be available.

[ljharb]

Fair point! Happy to accept a PR that clarifies the language :-) (we clearly haven't kept this list up to date, since class fields reached stage 3 a few months ago)

[MatteBailey]

I could probably make a PR! Question though: does this preset actually include any stage 3 transformations at this point? Looking through the source, I don't see any.

[ljharb]

Not any more - it used to, but they got promoted to stage 4. I'd probably word it like, all stage 3+ syntax is eligible, but it also has to be permitted by our JS style guide.

[MatteBailey]

Addressed in #43.