Sometimes, we want to get the type of a property of a TypeScript class using keyof operator.
In this article, we’ll look at how to get the type of a property of a TypeScript class using keyof operator.
How to get the type of a property of a TypeScript class using keyof operator?
To get the type of a property of a TypeScript class using keyof operator, we can use lookup types.
For instance, we write
type BarType = FooType["bar"];
to get the type of the bar property of an object of FooType with FooType["bar"].
And then we assign the returned type to BarType.
Conclusion
To get the type of a property of a TypeScript class using keyof operator, we can use lookup types.
