1. Introduction
3. Background and Basics
4. 1. TypeScript’s Versioning Policy
5. 2. Conformance
6. 3. Practical Guidance
8. Formal Specification
9. 4. Overview
10. 1. 4.1. Definitions
    2. 4.2. Breaking Changes
    3. 4.3. Non-Breaking Changes
    4. 4.4. Bug Fixes
    5. 4.5. Compiler Considerations
12. Appendices
13. 5. Overview
14. 1. 5.1. Adopters
    2. 5.2. Tooling
    3. 5.3. Variance in TypeScript
    4. 5.4. History