A pagination state management with useReducer

This is my memo when I implemented a pagination feature with useReducer.

and

I decided to use useReducer because it is necessary to simultaneously manage page numbers and an array whose elements are rendered in the page as well as other pagination related states.

The basic syntax of useReducer is the below.

It accepts a (state, action) => newState type reducer and returns a pair of current state and dispatch. This is syntax is quite similar to Redux.

This is the actual code.

1️) Set initial state

2) Define a reducer

You can use switch statement instead of if statement.

3) Call it inside of component function

4) Call dispatch method with each type respectively

type:”PAGINATION”

type: “QUERY”

type:”UPDATE”

Here is the whole code snippet of SearchBooksComponents.

Thank you for reading :)

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