ESM -> WebAssembly Component creator, via a SpiderMonkey JS engine embedding

JavaScript parser, mangler/compressor and beautifier toolkit

Collection of useful helper functions when trying to determine module type (CommonJS or AMD) properties of an AST node.

The powerful, easy-to-use testing framework.

Lexical ordering of property names per Esprima AST type

Clone AST without extra properties

simple but flexible lexically ordered AST traversal with pre and post visitors

ECMAScript code generator

convert ASTs between Shift and SpiderMonkey formats

Process execution for humans

confirm that a SpiderMonkey format AST represents an ECMAScript program

Esprima-compatible implementation of the Mozilla JS Parser API

Power Assert feature instrumentor based on the ECMAScript AST

grasp query engines common parts

a tiny JavaScript expression parser

Power Assert feature instrumentor on the fly

Detect Browser, Engine, OS, CPU, and Device type/model from User-Agent & Client Hints data. Supports browser & node.js environment

Power Assert instrumentor from source to source, with source-map

Human-friendly process signals

Facebook-specific fork of the esprima project