TypeScript tutorialLesson 9Free preview

TS Object Types

This lesson is part of TypeScript · All levels

Summary

Object type describes the shape of an object as a list of properties and their types. You can write it directly to the variable annotation, including marking the optional property. The compiler will reject objects whose properties do not conform to the declaration.

Key points

Object type is written as {name: type;...}
Optional property using the question mark
Readonly preventing changes in property values

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