A type guard is a TypeScript technique used to get information about the type of a variable, usually within a conditional block. Type guards are regular functions that return a type and telling TypeScript if it can be narrowed down to something more specific. There are five major ways to use a type guard: the instanceof keyword, the in keyword, custom type guard, and the equality narrowing type guard.
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The instanceof type guardThe typeof type guardWe made a custom demo for . No really. Click here to check it out .The in type guardEquality narrowing type guardCustom type guard with predicateConclusionWriting a lot of TypeScript? Watch the recording of our recent TypeScript meetup to learn about writing more readable code.3 Impressions