Pattern matching in TypeScript today
JavaScript does not have pattern matching yet, but TypeScript developers can model states clearly and use ts-pattern for exhaustive pattern matching today.
TypeScript Posts
TypeScript patterns that make intent, failures, and domain rules explicit.
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Why I do not use enums in TypeScript
Enums add runtime behavior, work against modern TypeScript workflows, and have simpler alternatives like string literal unions and const objects.
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Avoid truthy and falsy checks in TypeScript
Truthy and falsy checks in TypeScript hide intent and can introduce bugs. Prefer explicit checks for the values you actually care about.
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Prefer Task over Promise in TypeScript
Promises hide failure in an untyped rejection path. Task from true-myth makes asynchronous success and failure explicit in TypeScript.
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Avoid throwing for expected failures in TypeScript
Use Result in TypeScript for expected failures, Maybe for absence, and reserve exceptions for truly exceptional situations.
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The Billion-Dollar Mistake: Avoid "null" in TypeScript
Why null still causes bugs in TypeScript - and how Maybe types make absence explicit.