Type alias Middleware<I, O, II, OO>

Middleware<I, O, II, OO>: ((input, next) => Promise<O>)

A middleware is a function that encapsulates another function and transforms it

Type Parameters

I
Input type of the middleware
O
(Tranformed) Output type of the middleware
II
(Tranformed) Input type of the encapsulated function
OO
Output type of the encapsulated function

Type declaration

- (input, next): Promise<O>
- Parameters
  - input: I
  - next: ((input) => Promise<OO>)
    - (input): Promise<OO>
      Parameters
      input: II
      Returns Promise<OO>
  Returns Promise<O>

Remarks

They can both transform the input and output of the function, and add additional functionality around it.

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