Brokk's JavaScript Grammar for Tree-sitter

This is the Brokk-owned and independently maintained fork of tree-sitter/tree-sitter-javascript, a JavaScript and JSX grammar for Tree-sitter. Brokk maintains this fork for its code-intelligence tooling and publishes the Rust package as brokk-tree-sitter-javascript. It intentionally diverges where Brokk needs language support that is not yet available upstream. Unless you specifically need Brokk's changes, you may prefer the upstream project.

Try the grammar in Brokk's web playground.

Installation

Add the Brokk-maintained JavaScript crate to your project:

cargo add brokk-tree-sitter-javascript@=0.25.1

Or add it directly to Cargo.toml:

[dependencies]
brokk-tree-sitter-javascript = "=0.25.1"

The npm and Python bindings retain their upstream-compatible package names but are not published by this fork. The Brokk-namespaced Rust crate prefixes its native symbols, so it can coexist with the upstream tree-sitter-javascript crate in one executable.

This grammar intends to be a close approximation of the ECMAScript specification, with some extensions to support JSX syntax. We try to support the latest version of the spec, though it is possible that some very new features may not be supported yet.

References

• The ESTree Spec
• The ECMAScript 2025 Spec