Best Practices To Develop a World-Class Node.js App

Develop a World-Class Node.js App
By Mohit Surati Node.js 0 Views

Node.js is one of the most popular and renowned JavaScript frameworks that support frontend and backend development of a web application. People nowadays are searching for options to develop node js app.

Node.js can streamline your multifunctional application development process by enabling smooth execution and faster expansion of the project of any size.

You no longer have to be dependent on different JavaScript Framework for various aspects of the development of your app.

Everything can be manageable and built using Node.js framework, and developers can save a lot of time and energy by using Node.js as a standalone framework for building a web application.

With the help of Node.js, you can build highly scalable apps that are robust to last in any scenario.

Even though the Node.js is one of the most used in the framework, you still need to take care of a lot of things to build scalable code that gives a lasting impression to users.

Now, it’s time to get the things moving and understand the basic practices to develop node js app. So, let’s start the show, right now.!

Read on to know more about the best practices that we are going to discuss in this article to develop a world-class Node.js app.

1. NPM Is The Soul Of Your Node.js Code

NPM

Different coding platforms require different sentences and files to be mentioned or uploaded in the project.

Like in Java, they have library files, in C++ and C, developers define the library files to leverage methods and functions in the code and don’t have to define them in the code explicitly.

Similarly, Node.js has NPM to develop any project. Every Node JS Development Company should take care of it.

Just like header files let you use functions and methods in your code, the NPM will create a package.json file where you can mention the metadata that one can access across the project.

2. Always Setup .npmrc

Whenever you install NPM for your Node.js project, its version should be the same across all the platforms where you are running the particular project.

Because after initializing and NPM, you will be defining dependencies that would dominate how your code executes to develop node js app.

Now if you copy this code or take the source file and run it on other systems, it might happen that on that system, the NPM version would be different compared to what you had in the system where you had built your code.

Due to the difference in versions, the code and the dependencies might not reflect as per your choice, and the behavior of your code might get different in due time.

So, to avoid any such confusion, it is a good practice to upgrade the version of the framework inside the package.json file with the help of .npmrc.

So run the below two commands to ensure the dependencies are stored and upgraded regularly.

$ npm config set save=true

$ npm config set save-exact=true

3. Add Scripts To Package.json For Smoother Execution

Scripts can be beneficial to run specific functions whenever the NPM installation gets done on your device.

For any project to run correctly, the code needs to be adequately optimized, and methods must be defined beforehand so that variables are declared and accurate values get parsed for compilation.

To develop node js app that has enormous modules and thousands of lines of code, there would be few scripts that you would need to run before anything else to ensure the overall code runs correctly.

You can define these types of code inside the package.json file to make compiled and executed first.

These scripts can help you run any dependencies, or define variables and methods required for your code.

For example, you mentioned below code inside package.json

"scripts": {

"start": "node abc.js"

}

This code will start executing the abc.js file before the actual code begins. NPM knows the $PATH and will run node abc.js with all dependencies from node_modules/bin.

So, between “scripts”: {..}, you get to define the dependencies and respective Node.js files. You can also specify different kinds of scripts like post-install, pre-install, and test as per your choice.

You can also define your script and can run by typing npm run-script {name}.

4. Follow a Specific Style Guide

Style Guide

Sometimes the code is hard to format and even harder to understand by someone who hasn’t written it.

There would be a ton of opening and closing brackets, declaration, comments, and semicolons that make a source code extremely hard to comprehend.

Professional developers often come across a situation when they open-source code files, and they are overwhelmed by thousands of lines of code without understanding what one has written.

They cannot thoroughly understand how modules and blocks of code are co-related with each other. To develop node js app, this aspect matters.

It can be excruciating if someone who has not written the code has to edit and change a few lines of code to add some functionality in the project.

In such cases, chances of mistakes are highest, and the person might misjudge the relationship between the code and change irrelevant snippets.

To avoid any such scenario, it is an excellent practice to follow the style guide and stick to it out of the project development.

Here are the different style guides that you can follow to write your code.

Airbnb: https://github.com/airbnb/javascript

Google: https://google.github.io/styleguide/javascriptguide.xml

jQuery: https://contribute.jquery.org/style-guide/js/

Just pick one style guide as per your convenience and try to stick with it for all your projects.

If your team is more significant and usually handles all the tasks, you can develop a habit to follow the same style guide for all your Node.js projects.

5. Monitoring Apps Effectively

Monitoring Apps Effectively

In this era of digitalization, customers and prospects have a lot of tools to share their views with the world and make something viral quickly.

They can also interact with the brand using social media or email support to get instant assistance.

Although you can have a sales representative that entertain users questions if a problem comes, it is harmful for a brand reputation to read customers frustration on social media post or an email conversation.

An excellent way to avoid that is to get notified whenever something goes wrong in your Node.js application, your application is behaving differently, or servers are responding unusually slow. You can do this through KeyMetrics.io.

KeyMetrics is a paid tool, and it has a trial version that developers can leverage to monitoring their Node.js apps.

To enable KeyMetrics, in your Node.js project, register on the website and write below command.

$ pm2 interact [public_key] [private_key] [machine_name]

The above command will continually send CPU, and memory usage data to KeyMetrics’ server where you can also create events to get notified when a problem occurs.

6. Defining Error Handlers

Error Handlers

Errors are inevitable. And solving them to develop node js app can sometimes really time-consuming.

Some errors show messages about where is the real mistake happens in the code. Sometimes you also get the number of the line where the error has occurred.

In JavaScript, they have exception handlers that deal with all kinds of problems that occur while the program is running. That is the reason why people prefer Node.js In Web App Development.

The job of these exception handlers is to ensure that any error should not interrupt the on-going compilation of the code.

In Node.js, we have an error handler known as catch() that cope with all the exceptions generated throughout the code.

So, you can define catch(error handler) in your code to let it capture all the errors generated so far.

7. Ensure Minimal Downtime

As already said, errors can be lethal and slow down the process of the app. Sometimes, these errors force the program to go for a complete shutdown.

Such runtime errors are inevitable and beyond the scope of the exception handler. So, these kinds of errors make the application stop immediately, and the overall execution comes to a halt.

Remember that when the app stops running, the downtime of your server starts increasing since the app is no longer active, so the users might have to wait to get any response from the app.

This would give bad user experience overall. You can ensure that your Node.js application instantly starts after it takes a hit.

You must use PM2, Nodemon, or Forever to initiate instant restart after a fatal error.

There are lots of guides available online that you can check to install either of these as a global module.

Read also: Using The Power Of Blockchain In Different Industries

8. For Web Apps, Use Helmet

If you are developing web applications, you need to ensure a lot of things to make your application secure and robust on all the potential scenarios.

You must be sure that all the header files have been appropriately defined in your source code to be able to perform all the functions written in the code.

If the application is vast, ensuring, and maintaining all the header files for the web application can be tiresome for a developer.

So, it is a good practice to use the Helmet package for all your coding requirements.

Helmet package will enable all the header files for your web application and define them appropriately. Now, to install helmet in your Node.js web application, write below command.

$ npm install helmet

And when you setup Express in your code, you need to write,

var helmet = require('helmet');

app.use(helmet());

9. Load And Configure All Your Dependencies Upfront

Whenever a particular block of code starts running, it might require a few files or some block of codes to start running before everything else.

Well, Node.js will parse all the required files and dependencies. However, if any runtime error occurs, the whole project might have a crash down or become slower.

Because the block of the module is asking and executing dependencies or require some declaration statements which are not present whatsoever, so, the whole structure might slower the loading and execution time of your app.

Now, if your product is live on the web and users are using the app at the given moment, then it could be a very awkward situation for your business since the app could not serve the users.

In such cases, it becomes crucial for a web developer to practice a habit of loading all the dependencies upfront for the smoother execution of the Node.js code.

The developer can create a list of files, dependencies, or the declaration statements that should go before the actual code starts compiling.

10. Never Avoid Testing Your Application

Testing

If you are a developer of any platform, you must have heard this term testing and observed your seniors notifying you to keep testing the project for ensuring the utmost robustness.

Well, testing, sometimes dull but an essential aspect for your application to thrive in the competition.

Testing of your Node.js application will let you understand how the application behaves in specific scenarios and whether it is capable of serving users who use different platforms and devices.

Testing will give real-time results and transparency of the behavior of your code. If you feel that code is not correct or a particular element on the web app is not responding on specific devices, you can change your code and ensure that users get concurrent consumer experience on all the major platforms.

And unless you test, you would not be able to understand how the application performs at a given scenario. You can also make use of Micro Service Architecture in the Node.js.

Even though it sounds too geeky, but developers should run tests on all the platforms and all the scenarios, whenever they deploy a new version of their application.

If the earlier version was working correctly, and you avoided testing before deploying the app, and if users experience any bug or latency in the app, it will ruin the user experience.

It will also impact on the brand image and raise the question of the credibility of the developer. So, to avoid putting yourself in such an awkward condition, practice testing your Node.js application.

11. Be Clear About The Details Of The Project

In an IT service-based industry, it is casual that developers work for weeks and create an application and submit to the client or stakeholders or the project manager.

Then, the top management people request to change a few things because their children do not like the design of the application

Sometimes, these changes demanded by the client or the stakeholders are overwhelming for developers who have to change the foundational source code file to make those changes.

In such a scenario, there is a wastage of all the hard work and sources invested by the company and the developers. They have to do it again as per the client’s wish.

To avoid any such scenario, always clear-out project details with the concerned authority before you start writing code of your Node.js application.

You can go and organize questionnaires or a series of calls to decide the flow and the navigation of the Node.js application. Go as deep as possible into the minute details so that you don’t have to do a lot of rework.

Now I am not saying that changing the Node.js application is terrible to work. As long as most of the source code is not forced to be edited or affected by the required changes, it would work fine.

12. Create The Designs First

Before you build a world-class Node.js application, the role of designers is equally essential in developing a stunning app.

Even if you are an experienced programmer and write the code efficiently, you should always build initial design layouts of the application before beginning writing the code.

The initial designs and wireframing of your Node.js application will enable you to add a perspective about your project and identify how all elements connect and give a unified user experience.

As the project comes on board, don’t just write your Node.js code straightaway. To align the output of those source files would you need to go methodically and create client-approved designs first.

13. Leverage Cluster For Improved Performance

Improved Performance

Node.js runs a single process to run the code. So a unique process would be utilizing all processing power which might slow down the overall execution.

A good practice is to assign different processes to different CPU cores for better performance and reliable output. For more information on this subject, you can contact and Hire Node JS Developer from a reputed organization.

This way, all your processing and compiling tasks will be distributed among CPU equally; you can leverage simultaneous processing power and ensure anticipated results for your Node.js.

If a particular area of code is not working correctly; there won’t be a stoppage in the overall execution of your project.

To enable cluster computing capability for your Node.js application, run below command.

$ pm2 start myApp.js -i max

However, ensure that the process distributed across CPU cores don’t share any variable or the storage values or the database entries among themselves.

If they do, and for example, if one process requires memory and database which is already being accessed by different core, then the code could be executed properly.

Conclusion

If you are building a world-class Node.js application, then you would surely require time and effort from developers and designers.

Most importantly, it is a gradual experience where you improve as a developer as you grow and work on different types of projects.

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Mohit Surati

Mohit Surati

A post-graduate in Computer Engineering. Passionate about innovative writing & Content Marketing. A rich vein of experience in writing articles related to WordPress right from plugins, themes, customization, security, WooCommerce & Gutenberg. Pens down his thoughts for eSparkBiz @Custom WordPress Development Company where you can Hire WordPress Developer as per your requirements.

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