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A complete guide to TypeScript’s never type
TypeScript’s
nevertype is very under-discussed, because it’s not nearly as ubiquitous or inescapable as other types. A TypeScript beginner can probably ignorenevertype as it only appears when dealing with advanced types, such as conditional types, or reading their cryptic type error messages.The
nevertype does have quite a few good use cases in TypeScript. However, it also has its own pitfalls you need to be careful of.In this blog post, I will cover:
- The meaning of
nevertype and why we need it.- Practical applications and pitfalls of
never.- a lot of puns
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