Can you create a mapped type based on the property type? For example, if I want to map all properties with type String to Foo and all other types to Bar. Can this be done like this:
type MappedType<T> = {
[P in keyof T]: T[P] === String ? Foo : Bar
}
Is there a syntax to achieve this?
To accomplish your goal, you'll need to either download typescript@next or be patient for the official release of version 2.8.
Once you have the necessary tools in place, you can implement the desired functionality using the following code snippet:
type Mapped<T> = {
[P in keyof T]: T[P] extends string ? Foo : Bar
}
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