What you need to make an end-to-end project in the “MERN”(MongoDB, Express Js, React JS, Node Js) stack:

In this blog, I will discuss the creation of end-to-end product

React:
State Management
Lifecycle Methods
Import Components
props
Data transfer from one component to another component (Use Redux/useContext/Prop Drilling)
API Calling and maping the data
Array functions (map, filter, reduce)

MongoDB:
Use Mongoose: Mongoose is a MongoDB object modeling tool designed to work in an asynchronous environment.
Mongoose supports both promises and callbacks
MongoDb (for Online):https://www.mongodb.com/atlas/database

Express Js:
for the Creation of api

Node Js
To create a backend server