Best practices for writing code in full stack web development using MERN stack

Author: Nevil Serrao

The MERN stack is a popular stack for full stack web development. It consists of four technologies: MongoDB, Express, React, and Node.js.


Write modular code

Modular code is code that is divided into small, reusable pieces. This makes the code easier to read, understand, and maintain. When writing modular code, it is important to avoid repeating yourself. Instead, try to encapsulate common functionality into reusable functions or components.


Here is an example of a modular React component:

import React from "react";


const Greet = ({ name }) => {

  return <div>Hello, {name}!</div>;


export default Greet;

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This component can be reused in any part of your code where you need to greet the user by name.


Use design patterns

Design patterns are well-established solutions to common software development problems. They can help you write code that is more efficient, scalable, and flexible. There are a number of different design patterns available, so it is important to choose the right ones for your specific project.


Here are a few examples of design patterns that are commonly used in MERN stack development:


• Model-View-Controller (MVC): This pattern separates the application into three distinct components: models, views, and controllers. Models represent the data, views display the data, and controllers handle user interactions.

Flux: This pattern is a variation of MVC that is specifically designed for React applications. It provides a way to manage state in a unidirectional way.

Redux: This pattern is a similar to Flux, but it is more flexible and can be used with any front-end framework.

Write clean code

Clean code is code that is easy to read, understand, and modify. When writing clean code, it is important to use consistent naming conventions, indentation, and whitespace. You should also avoid using complex expressions and nested control flow statements.


Here are a few tips for writing clean JavaScript code:


Use descriptive variable and function names.

Use consistent indentation and whitespace.

Avoid using magic numbers. Use named constants or variables instead.

Use comments to explain your code.

Break down complex code into smaller, more manageable functions.

Test your code

Testing is an essential part of software development. It helps you to identify and fix bugs early on, before they cause problems for your users. There are a number of different testing frameworks available for MERN stack development, such as Jest and Cypress.


Here are a few different types of tests that you can write for your MERN stack application:


• Unit tests: Test individual units of code, such as functions and components.

Integration tests: Test how different units of code interact with each other.

End-to-end tests: Test the entire application to ensure that it works as expected.

Document your code

Documenting your code is important for a number of reasons. It can help you to remember how your code works, and it can also help other developers to understand your code. When documenting your code, you should include comments that explain what the code does, as well as any assumptions or limitations.


Here are a few tips for documenting your MERN stack code:


Use docstrings to document your functions and components.

Use comments to explain complex code or any code that is not obvious.

Use a consistent style for your documentation.

Use a version control system

A version control system is a tool that allows you to track changes to your code over time. This is important for a number of reasons, including collaboration, rollback, and audit. There are a number of different version control systems available, such as Git and Mercurial.


Using a version control system will help you to manage your code more effectively and prevent data loss.


Additional tips

Here are a few additional tips for writing code in full stack web development using the MERN stack:


Use a linter to check your code for stylistic errors and potential problems.

Use a formatter to format your code consistently.

Use a debugger to help you find and fix bugs.

Use a build tool to automate the process of building and deploying your application.

Keep your dependencies up to date.

By following these best practices, you can write code that is clean, maintainable, and efficient. This will make your life easier, and it will also make your code easier for others to understand and maintain.