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Advanced TypeScript Patterns for Large Codebases

Template literal types, conditional types, and the builder pattern — techniques that scale as your project grows.

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Priya Nair·April 1, 2025·8 min read

TypeScript's type system is far more expressive than most developers realise. Once you move beyond basic interfaces and generics, a whole category of compile-time guarantees becomes available.

Template literal types

TypeScript 4.1 introduced template literal types, letting you construct string types programmatically:

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