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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