Here is a code snippet I am working with:
type RouterQuery = keyof AppRouter['_def']['queries'];
This code defines the following type:
type RouterQuery = "healthz" | "post.all" | "post.byId" | "category.all" | "category.byId" | "course.all" | "course.featured"
My goal is to extract only strings that contain the '.all' postfix.
The desired extracted type should be:
type RouterQueryAll = "post.all" | "category.all" | "course.all"
Any solutions on how I can achieve this?
type FilteredRouterQuery = Extract<RouterQuery, `${string}.all`>
By utilizing the Extract utility in TypeScript, you can selectively extract types from a union that conform to a specific type. In this case, `${string}.all` represents a template literal type designed to match any strings ending with .all.
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