Beyond Basic Types: Mastering TypeScript's Advanced Type System for Robust Applications

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Discriminated unions solve this elegantly: console. error(response. message); // TypeScript knows message exists here console. log(response. data); // TypeScript knows data exists here The status property acts as a discriminator, allowing TypeScript to narrow the type within each branch. Template literal types, introduced in TypeScript 4. 1, bring type safety to string manipulation. What's your favorite advanced TypeScript feature?

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