And regrettably, that terrifying experience brings all the gap between a quality production application and a launch disaster.
With that said, let’s have a look the best Node.js practices that will rescue from falling on common Node.js traps.
1. Start all projects with npm init
Create a new project in Node.js using npm init
Doing so will create a new package.json and you can add a bunch of metadata, which will help others on the same project.
2. Setup .npmrc
The .npmrc file assures npm install always updates the package.json and imposes the version of installed dependency to be an exact match.
Add a scripts property and object to your package.json with a start key.
Now, whenever somebody will run npm start, npm will node myapp.js along with all the dependencies from node_modules/.bin on the $PATH and you don’t have to global installs of NPM
3. Use environment variables
Use environment variables in Node.js to look up the values from process.env in your code. You can check the NODE_ENV environment variables.
4. Use a style guide
Pick an existing set of guidelines for coding in Node.js and adhere to it to maintain code readability across the project chain.
5. Say no to synchronous functions
Synchronous functions block any other codes from executing until they have finished execution. To make sure no synchronous function is a part of the code, turn on –trace-sync-io flag and it will display a warning upon encountering a synchronous API.
6. Handle Errors
promises provide a .catch() handler that will circulate all errors to be dealt with, neatly.
Regardless, which of the earlier functions could have failed, any error will result in the errorHandler.
7. Confirm your app automatically restarts
Use a process manager to ensure the app recuperates elegantly from a runtime error or when the server you’re running it on goes down.
9. Cluster your app to improve reliability and performance
Because you want one process for each processing core so you can reallocate the capacity across all the processing cores, to scalable web applications handling HTTP needs and presentation, one worker fails, the others are there to acknowledge requests.
Use cluster for flexibility, for the future, even when it is a single process on a tiny piece of hardware.
10. Entail all your dependencies up front
At all times, perform all your dependencies and organize them upfront. This way, you’ll learn about a problem before it enthralls. Not after a customer finds it, a few hours your application has gone live.
11. Use Gzip compression
The server can compress the response before sending it to a web browser with the help of Gzip compression and thus reduces time lag and latency.
12. Concatenating multiple JS files
13. Employ client-side rendering
Employing client-side rendering in your Node.js project will considerable lessen latency and save bandwidth. Client-side JS frameworks—BackboneJS and AngularJS expose APIs which direct JSON responses, directly to the client, not via server where every request returns an HTML page.
14. Only git the significant bits
You should not track anything that’s developed when using a source control system like git. It causes redundant bloat and chaos in your git history when you trail generated files for changes.
15. Application Monitoring
It is important to be notified when your application goes down, particularly in production apps. So, using something to monitor and notify you to serious issues or irregular behavior is vital.
16. Test your code
Whatsoever stage you are in a project, it’s never very late to introduce testing. Start small, start simple.
17. Hop on the ES6 train
Node 4+ introduces an updated V8 engine with numerous valuable ES6 features Don’t be daunted by some of the extra compound stuff, you can acquire it as you go. There are adequate simple improvements for instant satisfaction.
18. Stick to lowercase
Some programming languages inspire filenames that reflect class names, like MyClass and ‘MyClass.js’. In Node.js, it is a complete no-no. As an alternative, use lowercase files:
19. Avoid garbage
Node (V8) uses a idle and acquisitive garbage collector. It limit is 1.5 GB, it mostly delays until it has to reclaim unused memory. If your memory usage is swelling, it might not be a leak – but somewhat node’s typical idle behavior.
To regulate your app’s garbage collector, you can raise flags to V8 in your Procfile:
20. Use ES2015
ES2015 support has grown to 99% with Node v6.
21. Use Promises
Promises are a concurrency primitive and a part of most contemporary programming languages to make life of developers easier.
22. Use Docker
Dockers empowers your applications to run in isolation, makes your deployments securer. Docker images are lightweight, they allow absolute deployments, and with them, you can reflect production settings in the vicinity.
23. Use Messaging for Background Processes
If you employ HTTP to send messages, then every time the receipt party is down, those messages are gone. Therefore, pick a persistent transport layer, like a message train to direct messages, you won’t have to run in this issue.
24. Use the Latest LTS Node.js version
To receive the best of the both worlds (stability and new features) we endorse using the newest LTS (long-term support) version of Node.js.
To switch Node.js version, use nvm and switch to LTS takes in two commands: