Required: TypeScript built-in mapped type with a real world use case

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Here we look at TypeScript's built in mapped type called Required.

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I was just facing the same issues now. having to pull null checks all over the place even when knowing the value is going to be there in some part. This tip came to the rescue at just the right time!

ishant
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Is there an easy way to do the same for some of the fields of interface but not the whole? E.g. { a?: string, b?: string } and i want only a to be required. And everything else untouched.

ishant