ESTree-sitter

ESTree-sitter is an ESTree compability layer for tree-sitter-javascript.

But what does that mean?

• ESTree is a common specification that babel prettier acorn and other JavaScript tools ~adhere to.
  • They adhere in that they produce or ingest an AST with a shape similar to a naive reading of the spec.
• tree-sitter is a parser generator from the future that generates parsers with some great properties (see docs).
• tree-sitter-javascript is effectively one such parser.

This project's goal is to produce ASTs in the 'ESTree format' from tree-sitter-javascript's ASTs.

ASTs produced by this project should be identical to those that an ESTree parser (namely Acorn) would produce.

As a result, other ESTree-based tools like prettier could run 'using tree-sitter', which would be freaking sick.

Getting started

Dont! This project is WIP and as of this commit (06-18-24) only passes 60% of prettier's js test corpus.

It's not even on a package manager yet AFAIK, how are you here?

Known Limitations

• This layer does not attach a sourceType attribute at all, even though it is described by the spec.