Fast REACT PIZZA

• in this read me I have shared my learnings.

get started with Vite

• You can use npm create vite to start a project with vite.
• This template provides a minimal setup to get React working in Vite with HMR and some ESLint rules.
• Currently, two official plugins are available:
• @vitejs/plugin-react uses Babel for Fast Refresh
• @vitejs/plugin-react-swc uses SWC for Fast Refresh
• So when we install using vite no extra library gets installed. Hence we need to do npm i
• in vite we use npm run dev instead of npm start

setup eslint

• we also need to configure eslint: npm i eslint vite-plugin-eslint eslint-config-react-app --save-dev
• after this we need toupdate eslintrc.json and vite.config.json files

Planning the project

• divide app into features
• divide apps into pages
  • think about overall and page level UI
  • break UI into components
  • design asnd build static version
• divide the app into feature categories
  • think about state management and dataflow
• decide th tech stack we need to use.

components

• user - global UI state
• menu - global remote state ( menu comes from API)
• cart - global
• order - global remote

tech stack

• react router (render as you fetch instead of fetch on render) - routing + remote state management
• tailwindcss - styling
• redux - UI state manegement

folder structure

• we will follow feature based folder structure
• for doing this you can download the starter boiler plate code.

react router dom

• npm i react-router-dom
• hen we can use createBrowser router to create the paths
• and then we can return the routerprovider ad pass the routers as an argument
• AppLayout will be the parent compinent so it will also be in the parent route
• the child routes data is shown in the outlet.

loader in react router dom

• we create function to fetch data from some api
• then we provide that function to one of our routes, as soon as the application goes to that route.
• once the data is reached it will be provide to the component using a custom hook.
• so first we will create a loader function in menu.jsx that calls the api function.
• thn we will import that loader function and will add it into thr route path of menu
• then in the menu component we will use the useloaderdata() hook to import it.

usenavigation hook

• it tells whether the data is loading or is idle.
• we can use it to show the loader
• we can get the error using useRouteError() hook when their is some issue in the routing.
• useNavigate hook is different from usenavigation hook, it is used when we want to change the route based on cretain conditions.

Form

• sor Form is a component provided by react router.
• so whenever we submit this Form, react router will automatically call the action function.
• lecture number 291 is important
• the action function will then the response that we submitted in the form using request.
• Then we can call the createorder function and then we can use redirect to direct us to the order page.
• we need to use redirect instead of useNavigate hook because we usenvaigate can only be called inside a component function.
• useActionData() hook is used to get the data that is returned by the action.

Tailwind

• we will be using tailwind to style our app

Redux toolkit

• npm i @reduxjs/toolkit react-redux

• decreaseItemQuantity(state, action) {
      const item = state.cart.find((item) => item.pizzaId === action.payload);
      item.quantity--;
      item.totalprice = item.quantity * item.unitPrice;
      if (item.quantity === 0) {
        cartSlice.caseReducers.deleteItem(state, action);
      }
    },

• by doing this we can call one reducer function inside another reducer function.
• we can aslo directly use store reducer like store.dispatch(clearCart()); but we should not overuse it.
• redux by nature is synch, so in order to work with async code we can use thunks
• thunks is a middleware that sits between the dispatching and the reducer itself.
• in the PUT request we need to send the entire object, in the patch request we just need to send the data we want to update or add in the object.