Telarel

An extensible JavaScript compiler written in Rust, and built around plugin hooks.

import type { CodeResult } from "telarel";

import { compile } from "telarel";

const result: CodeResult = await compile("const x: number = 1;");

use telarel::{CodeResult, CompileOptions, compile};

let result: CodeResult = compile(
    String::from("const x: number = 1;"),
    CompileOptions::default(),
    vec![],
)
.await?;

Why Telarel

Native speed

The compiler is written in Rust and built on oxc, so compilation runs in native code. There is no JavaScript reimplementation behind the JavaScript API.

Hook-based pipeline

Different return-based hooks — options, start, parse, prepare, transform, finalize, generate, and end — over one shared pipeline. A plugin implements any subset; the rest are skipped.

Plugins in JavaScript & Rust

Extend the pipeline from either side: JavaScript plugin objects bridge to the same Rust contract, and both languages set per-hook pre, normal, or post order.

Opt-in Transform

Lower TypeScript, JSX, and modern syntax with the built-in transform plugin — or leave it out. compile without it still parses and regenerates your source unchanged.

JavaScript and Rust APIs

The same compiler is exposed as the telarel crate and as the telarel npm package via a NAPI binding, with the same functions and shared types.

Composable entry points

parse, rewrite, generate, compileFromAst, and compile share one pipeline, each running only the stages it owns, so you can stop at an AST and resume later.