Acorn alternatives and similar modules

Based on the "Ast" category.
Alternatively, view Acorn alternatives based on common mentions on social networks and blogs.

cherow

5.8 0.0 Acorn VS cherow

JavaScript parser with focus on performance and stability.
Rocambole

2.6 0.0 L2 Acorn VS Rocambole

Recursively walk and transform EcmaScript AST

SurveyJS - Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App

With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.

Promo surveyjs.io

babel-parser

0.1 - Acorn VS babel-parser

JavaScript parser used in Babel.

* Code Quality Rankings and insights are calculated and provided by Lumnify.
They vary from L1 to L5 with "L5" being the highest.

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README

Acorn

A tiny, fast JavaScript parser, written completely in JavaScript.

Community

Acorn is open source software released under an MIT license.

You are welcome to report bugs or create pull requests on github. For questions and discussion, please use the Tern discussion forum.

Packages

This repository holds three packages:

acorn: The main parser
acorn-loose: The error-tolerant parser
acorn-walk: The syntax tree walker

To build the content of the repository, run npm install.

git clone https://github.com/acornjs/acorn.git
cd acorn
npm install

Plugin developments

Acorn is designed to support plugins which can, within reasonable bounds, redefine the way the parser works. Plugins can add new token types and new tokenizer contexts (if necessary), and extend methods in the parser object. This is not a clean, elegant API—using it requires an understanding of Acorn's internals, and plugins are likely to break whenever those internals are significantly changed. But still, it is possible, in this way, to create parsers for JavaScript dialects without forking all of Acorn. And in principle it is even possible to combine such plugins, so that if you have, for example, a plugin for parsing types and a plugin for parsing JSX-style XML literals, you could load them both and parse code with both JSX tags and types.

A plugin is a function from a parser class to an extended parser class. Plugins can be used by simply applying them to the Parser class (or a version of that already extended by another plugin). But because that gets a little awkward, syntactically, when you are using multiple plugins, the static method Parser.extend can be called with any number of plugin values as arguments to create a Parser class extended by all those plugins. You'll usually want to create such an extended class only once, and then repeatedly call parse on it, to avoid needlessly confusing the JavaScript engine's optimizer.

const {Parser} = require("acorn")

const MyParser = Parser.extend(
  require("acorn-jsx")(),
  require("acorn-bigint")
)
console.log(MyParser.parse("// Some bigint + JSX code"))

Plugins override methods in their new parser class to implement additional functionality. It is recommended for a plugin package to export its plugin function as its default value or, if it takes configuration parameters, to export a constructor function that creates the plugin function.

This is what a trivial plugin, which adds a bit of code to the readToken method, might look like:

module.exports = function noisyReadToken(Parser) {
  return class extends Parser {
    readToken(code) {
      console.log("Reading a token!")
      super.readToken(code)
    }
  }
}

*Note that all licence references and agreements mentioned in the Acorn README section above are relevant to that project's source code only.