Tips for contributing to TypeScript

• Architecture
  • Architectural Overview
  • sandersn/mini-typescript - A miniature model of the Typescript compiler, intended to teach the structure of the real Typescript compiler
  • How the TypeScript Compiler Compiles - understanding the compiler internal - YouTube
• Start Contributing
  • Contributing to TypeScript · microsoft/TypeScript Wiki
  • TypeScript/CONTRIBUTING.md at master · microsoft/TypeScript
• Building
  • Use npx gulp for those who don't want to install gulp globally.
• Use TDD with running specific test cases, it's faster.
• Managing the Baselines
  • Compiler test cases generate baselines which are;
  • .js - generated JavaScript
  • .types - the type of each expression in the file.
  • .symbols - generated symbols
  • .errors.txt - the errors produced by the compiler
  • You can inspect changes and the expected baselines
  • After verifying that the changes in the baselines are correct, run gulp baseline-accept
• Enable Code Lens in VSCode. Show On All Functions is useful because compiler's code are written with a lot of functions.
• Disable eslint auto fix, it's slow. (Anybody who knows how to speed up?)