// File to parse input as an AST using acorn const parserOptions = { ranges: true, locations: true, ecmaVersion: "latest", // https://github.com/tc39/proposal-hashbang allowHashBang: true, }; const acorn = require("acorn"); const res = acorn.parse(process.argv[1], parserOptions); console.log(JSON.stringify(res, void 0, 2));