switch statement in react redux

 

 

Hello viewers, i am back again for you and now we will start from redux-saga. So, we are ready for implemenation of reducer in redux. Actually we are making some project like E-commerce where we can implement searchbar, product add to cart, remove from cart, empty cart, cart section after adding some product and product section and a lot of things, So, don't worry i'm not going to leave you alone.

 

 

React

Certainly, Reactjs is a JavaScript library developed by Facenook for building user interfaces. It allows developers to create reusable UI components and effciently manage the state of their applications. Here are some key aspects of Reactjs.


Component-Based Architecture: ReactJS follows a component-based architecture, where the user interface is divided into small, reusable components. Components encapsulate their own logic, state, and rendering, making it easier to build and maintain complex user interfaces.



Virtual DOM: ReactJS uses a virtual representation of the DOM (Document Object Model), known as the Virtual DOM. When the state of a component changes, React updates the Virtual DOM.



JSX: JSX is a syntax extension for JavaScript used in React. It allows developers to write HTML-like code within JavaScript, making it easier to describe the structure and appearance of components. JSX code is transpiled to regular JavaScript using tools like Babel before being executed in the browser.


Hooks: React introduced Hooks in version 16.8 as a way to use state and other React features in functional components. Hooks allow developers to write reusable logic and manage state within functional components without the need for class components. The most commonly used hooks are useState for managing state and useEffect for handling side effects such as fetching data or subscribing to events.


React Router: React Router is a popular routing library for React applications. It enables developers to create single-page applications with multiple views and handles routing between different components based on the URL.


State Management: React provides a flexible ecosystem of state management solutions. While React's built-in state management (useState ) is suitable for managing local component state, more complex applications may benefit from additional state management libraries like Redux. These libraries help manage global application state and provide predictable ways to update and access the state.


ReactJS has gained widespread popularity due to its performance, reusability, and declarative approach to building user interfaces. It has large community.

 

Topic we will cover -

# Why need Switch Statement inside reducer

# Make Switch Statement

# Check some with Switch statement

Why need Switch Statement inside reducer

 

If you remember something, in this previous blog we have to applied in reducer ADD_TO_CART option when user cilck on cart then item will be added to the cart. Like this

Reducer Link - CLICK HERE

 

 But there is problem becuase of if we have so many cart option like ADD_TO_CART, UPDATE_TO_CART, DELETE_TO_CART etc then that time we can't use so many if-else-elseif statement just because it's increase the complexity of our program and this is suitable for developers also.

So, for this we will use Switch Statement.

Make Switch Statement

If you have remember something there is some cases in switch statement, so lets started.

import { ADD_TO_CART, REMOVE_TO_CART } from './Constant';

export const cartData = (data = [], action) => {
 

    switch(action.type)
    {
        case ADD_TO_CART:
            // if we have 5 items then want to add more one
            console.log("ADD_TO_CART CONDITION", action)
            return 1+1;
        case REMOVE_TO_CART:
            //if we have 5 item then want to remove one item
            return 1-1;
        default:
            return "no condition matched";
    }
}

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This way is to write switch case statement and that matched from Action.jsx file because of user want add to cart item then that case statement and inside written logic run there.

Watch Full Tutorial

# Install redux and saga packages - CLICK HERE

# Make reducer wrapper - CLICK HERE

# Action in reducer - CLICK HERE

# Reducer in redux - CLICK HERE

 

 

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