Parser

A high-performance JavaScript / TypeScript parser written in Rust, powering other tools in the Oxc project.

Features

• 3x faster than swc parser (benchmark).
• Parses .js(x) and .ts(x).
• Passes all parser tests from Test262 and 99% from Babel and TypeScript.
• Returns ESM information directly, no need for es-module-lexer.
• ✅ works with checker.ts

Installation

Node.js

• Use the node binding oxc-parser.
• Try on stackblitz.

Rust

Use the umbrella crate oxc or the individual oxc_ast and oxc_parser crates.

Rust usage example can be found here.

Print

After parsing and transforming, you can print code.

Here's a direct example using esrap (parse in reverse!):

import { print } from "esrap";
import ts from "esrap/languages/ts";
import { parseSync } from "oxc-parser";

const { program } = parseSync("test.js", 'alert("hello oxc & esrap");');
const { code } = print(program, ts());

console.log(code); // alert("hello oxc & esrap");

INFO

Today, comments are not printed. It will be supported thanks to oxc-parser #13285.