@rust-it/es-module-lexer

A Rust version of es-module-lexer,
and it supports parsing jsx / ts / tsx out of the box. Powered by oxc.

Install

``sh
npm install @rust-it/es-module-lexer
`

Usage

`ts
import { parse, parseAsync } from '@rust-it/es-module-lexer';

const source = 'export { foo } from "./foo.ts";';

// sync
const { imports, exports } = parse(source, 'index.ts');
// async
const { imports, exports } = await parseAsync(source, 'index.ts');
`

parse multiple files:

`ts
import { parseMultiple, parseMultipleAsync } from '@rust-it/es-module-lexer';

const inputs = [
{
sourceText: 'export { foo } from "./foo.ts";',
filePath: 'index.ts',
},
{
sourceText: 'import bar from "./bar.ts";',
filePath: 'other.ts',
},
];

// sync
const results = parseMultiple(inputs);
// async
const results = await parseMultipleAsync(inputs);

// > results:
// {
// 'index.ts': { imports, exports, ... },
// 'other.ts': { imports, exports, ... },
// }
`

> Check out es-module-lexer for details of the parse results.

Benchmark

Parse sample files.

`sh
✓ __test__/index.bench.ts (9) 10778ms
name hz mean
· es-module-lexer 36.7348 27.2221 fastest
· @rust-it/es-module-lexer 8.4034 119.00
· @rust-it/es-module-lexer async 24.6149 40.6257
· @rust-it/es-module-lexer multiple 26.4290 37.8372
· @rust-it/es-module-lexer multiple async 26.5319 37.6905
· rs-module-lexer 5.7273 174.60 slowest
· rs-module-lexer async 15.8369 63.1438
· rs-module-lexer multiple 18.3675 54.4440
· rs-module-lexer multiple async 17.8458 56.0355


BENCH Summary

es-module-lexer - __test__/index.bench.ts >
1.38x faster than @rust-it/es-module-lexer multiple async
1.39x faster than @rust-it/es-module-lexer multiple
1.49x faster than @rust-it/es-module-lexer async
2.00x faster than rs-module-lexer multiple
2.06x faster than rs-module-lexer multiple async
2.32x faster than rs-module-lexer async
4.37x faster than @rust-it/es-module-lexer
6.41x faster than rs-module-lexer
``