@oxc-parser/wasm

About

Experimental wasm package for the oxc parser, with full TypeScript typings support.

This package is built with different wasm-pack's target builds:

• wasm-pack build --target web for bundler (webpack / vite) consumption.
• wasm-pack build --target nodejs for node.js

And exports the files as

"main": "./node/oxc_parser_wasm.js",
"browser": "./web/oxc_parser_wasm.js",
"types": "./node/oxc_parser_wasm.d.ts",

Check out oxc-parser for an alternative in Node.js which performs the same function, but using native code via NAPI bindings (slightly faster).

Source code: https://github.com/oxc-project/oxc/tree/main/wasm/parser

Usage

Node.js

import { parseSync } from '@oxc-parser/wasm';

const code = 'let foo';
const result = parseSync(code, { sourceFilename: 'test.ts' });
console.log(result.program);

Browser

import { initSync, parseSync } from '@oxc-parser/wasm';

initSync();

const code = 'let foo';
const result = parseSync(code, { sourceFilename: 'test.ts' });
console.log(result.program);

Notes

The AST returned conforms to the ESTree spec for JS syntax.

For TypeScript code, the AST is broadly aligned with typescript-eslint's format, though there may be some differences.

Vite

wasm-pack build --target web is used for the wasm build.

You may need something like https://github.com/nshen/vite-plugin-wasm-pack to get it working with vite, otherwise vite will load the wasm file as a HTML file causing a CompileError: WebAssembly.instantiate(): expected magic word error.