Conditional types in TypeScript

This content originally appeared on 2ality – JavaScript and more and was authored by Dr. Axel Rauschmayer

A conditional type in TypeScript is an if-then-else expression: Its result is either one of two branches – which one depends on a condition. That is especially useful in generic types. Conditional types are also an essential tool for working with union types because they let us “loop” over them. Read on if you want to know how all of that works.

This content originally appeared on 2ality – JavaScript and more and was authored by Dr. Axel Rauschmayer

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