zertosh / loose-detect

Fast (and loose) `require` and `import` extractor using js-tokens instead of an AST

loose-detect

Fast (and loose) require and import extractor js-tokens instead of an AST.

Gotchas

• Doesn't handle broken syntax.
• Doesn't look inside embedded expressions in template strings.
  • This doesn't work:

  // "pretty-ms" will not be found
  console.log(`time: ${require('pretty-ms')(Date.now())}`);

• See https://github.com/lydell/js-tokens#limitations

Usage

$ npm install loose-detect

var detect = require('loose-detect');
console.log(detect('import a from "a"; require("b")'));
// ["a", "b"]

Benchmark

$ find ./bench/nuclide -type f -name '*.js' -print0 | xargs -0 ./bench/bench.js
Looking at 1575 files
babylon & babel-traverse: 5651.09ms
loose-detect:             249.92ms