compiler-core-tachys

Shared compiler core for the Tachys JSX compilers. Defines a portable CompiledIR and a string emitter that turns it into markCompiled + _template source, with no dependency on any particular AST library.

This package is the runtime dependency of both babel-plugin-tachys and swc-plugin-tachys. Most users should depend on one of those rather than on this package directly. It's published so that an alternative frontend (Oxc, a Rust transformer, etc.) can target the same IR and reuse the emitter.

What's in here

• CompiledIR and slot variant types: the portable target a frontend produces.
• emitComponent(ir, opts): the string emitter. Returns a markCompiled(...) call source plus any module-scope helper declarations a caller should hoist.
• dsl (JsExpr, JsStmt, PREC): a typed JS emission helper with operator-precedence-aware auto-parenthesization, used internally by the emitter.

Install

pnpm add compiler-core-tachys

Usage

import { emitComponent, type CompiledIR } from "compiler-core-tachys"

const ir: CompiledIR = /* produced by your frontend */
const { callSrc, hoistedHelpers } = emitComponent(ir, {
  tplId: "_tpl$MyComp_0",
  listHelpers: new Map(),
  markCompiledName: "markCompiled",
})

The frontend is then responsible for splicing callSrc into the source where the original component declaration was, and prepending the template declaration plus any hoistedHelpers.

License

Dual-licensed under MIT or Apache-2.0, at your option.