Hasty Treat - TypeScript Utility Types


In this Hasty Treat, Scott and Wes talk about TypeScript utility types — what they are, why you might use them, why they exist, and more!

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Show Notes

03:35 - Levels of using TypeScript

  1. Typing your code
  2. Typing your code, but getting a little bit more dynamic using utility types
  3. Creating your own utility types!

07:29 - Partial

08:23 - ReadOnly

09:00 - Required

09:33 - Record

  • A record is an object type that is a bit more restrictive
  • Say you want to store podcast details - name, URL, showCount, etc., but only for Syntax and Shoptalk.

10:47 - Omit

  • I find this one handy when I want to create a “Create Item” type, where it has all the item fields except the ID field

11:34 - Pick

  • Given a type, pick these properties

12:39 - Return Types

  • Gives you the type that is returned from a function. Handy if you need to dynamically generate the type based on a passed function.

13:30 - Case

  • These case types are useful for when you are doing template literal types
  • Uppercase
  • Lowercase
  • Capitalize
  • Uncapitalize
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