TypeScript

📌 Planned placeholder page: this page is reserved for "Type system, generics and engineering practices", and the content will be filled in progressively along with learning.

Planned Content

• [ ] Type hierarchy and type narrowing
• [ ] Conditional types, mapped types and template literal types
• [ ] Type gymnastics in practice
• [ ] Writing declaration files and managing third-party types

Next Steps

• [ ] Complete this page item by item against the planning checklist in the Domain Overview
• [ ] Add runnable examples and pitfall records for each entry
• [ ] Change the status from "Planned" to "Collected" when done

For writing guidelines, please refer to the Domain Overview.