Assertion Functions or Assertion Guards - TypeScript Narrowing #5
The fifth video in our TypeScript Narrowing series. In this video, we cover Assertion Functions (also known as Assertion Guards).
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CHAPTERS
0:00 Introduction
0:27 Assertion Functions vs Type Guards
1:29 Early Exits
2:17 Issues with Control Flow Analysis
3:21 Function Expressions with Predefined Types
4:04 Assertions without a Type Predicate
4:24 Conclusion
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3. TypeScript Narrowing Part 1 - What is a Type Guard: • What is a Type Guard - TypeScript Nar...
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5. TypeScript Narrowing Part 3 - Custom Type Guards: • Custom Type Guards - TypeScript Narro...
6. TypeScript Narrowing Part 4 - Discriminated Unions or Tagged Unions Types: • Discriminated Unions or Tagged Unions...
REFERENCES
1. Assertion Functions (TypeScript Documentation): https://www.typescriptlang.org/docs/h...
2. Pull Request - Assertion Functions (TypeScript Github Repository): https://github.com/microsoft/TypeScri...
3. Pull Request - Error Messages for Assertion Functions that couldn't be Control Flow Analysed (TypeScript Github Repository): https://github.com/microsoft/TypeScri...
4. Issue - Assertion Functions and Function Expressions (TypeScript Github Repository): https://github.com/microsoft/TypeScri...
5. Code Examples (Lucas Paganini): https://www.typescriptlang.org/play?#...
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