TypeScript Fundamentals × Narrowing, Discriminating Unions, and Type Guards

In this Hasty Treat, Scott and Wes talk about TypeScript Fundamentals, including narrowing, discriminating unions, and type guards.
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Show Notes 00:24 Welcome
01:35 Sponsor: Sentry
02:23 Sponsor: Payments Hub
05:21 Intro to TypeScript fundamentals
06:28 What is Type Narrowing?
09:32 typeof
11:58 instanceof
13:29 Custom typeguards
16:12 this is
17:59 discriminated unions
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