In short
Conditional types, template literal types, and `infer` — TypeScript's most powerful (and advanced) tools for building precise, expressive type-level logic.
How to learn this
- 1Read a few examples of conditional types (`T extends U ? X : Y`).
- 2Try a template literal type to model string patterns (e.g. route paths).
- 3Don't over-invest here early — revisit once you're comfortable with the basics.
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