Stefan Baumgartner • 7/21/2021

TypeScript: Unexpected intersections

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This article delves into a common TypeScript puzzle where assigning values to object properties via index access types causes the error 'Type is not assignable to never'. It explains how TypeScript uses intersection types to find the lowest common denominator of possible values, leading to this counter-intuitive behavior, and provides illustrative code examples.

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#TypeScript #type system #type safety
TypeScript: Unexpected intersections

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