Phase 7 · TypeScript

Topics

Types

Part of the Frontend Developer Roadmap.

Summary

The basic building block of TypeScript — annotating variables, parameters and return values so mismatches are caught at compile time instead of runtime.

How to Learn This

  • 1Add type annotations to a small existing JS file's variables and functions.
  • 2Learn TypeScript's structural typing — types match by shape, not by name.
  • 3Practice letting inference work instead of over-annotating everything.
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