Is it possible to reuse parameter types in typescript in the following manner:
interface Box {
create: (paramToReuse: (value: any) => void) => void
}
// Can paramToReuse be referenced as a type? For example:
let x: Box['create']['paramToReuse']
While it is achievable by first defining paramToReuse and then referencing it in Box's interface, is there a way to do it like demonstrated above?
If you prefer using the parameter index (0) instead of its name ("paramToUse") for referencing, you can achieve this by utilizing the utility type Parameters. This type transforms a function into a tuple of its parameters:
interface Container {
insert: (paramToRecycle: (item: any) => void) => void
}
let y: Parameters<Container["insert"]>[0] // y is now of type (item: any) => void
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