This repository is a Node.js/TypeScript library for dependency injection (DI), heavily inspired by Symfony's DI container. It provides a service container that manages object construction, autowiring (automatic dependency resolution from constructor parameter types), and service configuration via YAML, JSON, JavaScript, and XML files. The library supports advanced features such as compiler passes, service decoration, tagged and keyed services, conditional service registration, lazy loading, and graph export. It includes a CLI tool for generating configurations and inspecting the container. The architecture follows a modular design: a ContainerBuilder manages definitions and compilation, loaders parse configuration files, and a compiler runs passes in ordered phases (optimization, removal, decoration). Autowiring uses TypeScript's AST (via @typescript-eslint/typescript-estree) to scan source files and register services automatically. The library also provides validation, graph export in multiple formats (JSON, Mermaid, DOT), and a condition evaluation system for environment-aware service registration. The codebase is well-structured with clear separation of concerns, extensive tests (both JavaScript and TypeScript), and demonstrates several design patterns (compiler pass, strategy for loaders/dumpers, reference objects, condition evaluation). However, the project appears unmaintained: the last CHANGELOG entry is from 2018, dependencies are outdated (e.g., commander v8, chalk v4, TypeScript 4.6.4), and the package.json version is 0.0.0. Despite its age, the core concepts remain relevant and the code quality is solid for a library of its kind.
This repository is an educational cheatsheet/documentation project that provides code examples for ECMAScript features from ES2015 through ES2025. It is not a production application but rather a reference collection of JavaScript feature demonstrations organized by ECMAScript version. The code examples are designed to be run with Babel Node and serve as learning materials for developers exploring new JavaScript features. The architecture is a flat file structure with examples organized in versioned directories (es2015/, es2016/, etc.). Each .js file contains self-contained examples demonstrating specific language features like arrow functions, classes, promises, async/await, and newer features like Temporal API and Iterator Helpers. The repository uses Babel for transpilation support and includes a GitHub Actions workflow for generating documentation artifacts. This is primarily a documentation/educational resource rather than a reusable code library. The examples are intentionally simple and lack production-grade patterns like error handling, testing, or abstraction layers. They serve their purpose as learning materials but should not be directly imported into production codebases.