Chevrotain

TLDR

• Online Playground
• Getting Started Tutorial
• YouTube Video: Introduction to Lexers, Parsers and Interpreters with Chevrotain
• Performance benchmark

Introduction

Chevrotain is a blazing fast and feature rich Parser Building Toolkit for JavaScript with built-in support for LL(K). Grammars and 3rd party plugin for LL(*) grammars. It can be used to build parsers/compilers/interpreters for various use cases ranging from simple configuration files, to full-fledged programming languages.

Grammars are written as pure JavaScript sources without a code generation phase,

A more in depth review of Chevrotain can be found in this great article on: Parsing in JavaScript: Tools and Libraries.

Installation

• npm: npm install chevrotain
• Browser ESM bundled versions: These can be downloaded directly via UNPKG or other NPM cdn services, e.g.:
  • Latest:
    • https://unpkg.com/chevrotain/lib/chevrotain.mjs
    • https://unpkg.com/chevrotain/lib/chevrotain.min.mjs
  • Explicit version number:
    • https://unpkg.com/chevrotain@11.0.3/lib/chevrotain.mjs
    • https://unpkg.com/chevrotain@11.0.3/lib/chevrotain.min.mjs

Documentation & Resources

• Sample Grammars.

• FAQ.

• Other Examples.

• HTML API docs.

  • The Parsing DSL Docs.

• ALL(*) Lookahead in Langium

Compatibility

Chevrotain will run on any modern JavaScript ES2015 runtime. That includes nodejs maintenance/active/current version, modern major browsers, but not legacy ES5.1 runtimes such as IE11.

Contributions

Contributions are greatly appreciated. See CONTRIBUTING.md for details.

Where used

A small-curated list:

1. HyperFormula

   • HyperFormula is an open source, spreadsheet-like calculation engine
   • source

2. Langium

   • Langium is a language engineering tool with built-in support for the Language Server Protocol.

3. Prettier-Java

   • A Prettier Plugin for Java
   • source

4. JHipster Domain Language

   • The JDL is a JHipster-specific domain language where you can describe all your applications, deployments, entities and their relationships in a single file (or more than one) with a user-friendly syntax.
   • source

5. Argdown

   • Argdown is a simple syntax for analyzing complex argumentation.
   • source