handling mutliple inputs using redux

I have react hooks section in which user can edit input fields, there are hundreds of inputs that is why I need to use redux (newbie to redux though),

Live demo on codesandbox: demo

so far I have this

const initialState = {
  firstName: "Kunta ",
  lastName: "Kinte"
};

const detailsReducer = (state = initialState, action) => {
  const { name, value } = action;

  return { ...state, [name]: value };
};

export default detailsReducer;

and here is setting js where I have input fields

import React, { useState } from "react";
import { useSelector } from "react-redux";
import Details from "./Details";
import DetailsReducer from "../Reducer/DetailsReducer";

const Settings = () => {
  const fields = useSelector((state) => state.DetailsReducer);
  const [state, setState] = useState("");

  return (
    <div>
      <div>
        <h1>Edit </h1>
        <div className="container">
          <div className="inputs">
            <label htmlfor="fname">First name:</label>
            <input
              type="text"
              id="fname"
              name="fname"
              value={state}
              onChange={(e) => setState(e.target.value)}
            />
            <label htmlfor="lname" />
            Last name:
            <input type="text" id="lname" name="lname" onChange={(e) => setState(e.target.value)} />
          </div>
          <Details />
        </div>
      </div>
    </div>
  );
};

export default Settings;

Expected results: Just when the user types in inputs eg first name it should change the value of the first name in the details component.

I am strugling to get this working can some please help?

Answer

I forked your CodeSandbox and got a working example here

Some notes on what I did to get it working.

1. Added redux package which is the core redux functionality. This is what lets you create a redux store. Check out the docs here.
2. Create store with the DetailsReducer using createStore from redux package. View this here.
3. Wrapped App.js with the Provider from react-redux. This is where you pass your redux store. Check docs here. This is important as it is the integration that allows react applications to work with redux. Without this, you can not use useSelector or useDispatch for example.
4. The next part is using the redux state values and dispatch on the input fields which you can see here.

Just to be clear, the redux package is the core redux functionality. It is designed this way so redux can be used anywhere (like server side with NodeJS). The react-redux package is the react integration that makes consuming redux easy for react applications.

Side Note: Technically when you call dispatch you pass a type and the type controls how the reducer changes its state. Your example is so simple, there is no need for a type which is why in the example you see the type as an empty string. Here is an example of using the type though in the docs.