Best Practices to Create a Large Web App Using React2 min read
Modern web apps rely very often on SPA (Single Page Application), and ReactJS comes out as one of the most used libraries for this purpose. Yet, we can find it very handy for small to medium-scale web apps.
Still, when it comes to large apps, similarly to any other technology, we should pay more attention to using the best practices to make our product scalable and maintainable throughout its lifecycle.
Here are 7 most important tips that any frontend developer should follow when working on a large ReactJS web app:
1️⃣ High-quality code
One final thing is to do a code review to enhance the code quality because even the more experienced developers can still make mistakes or forget about a few good practices.
2️⃣ Using Typescript
Even though, at the beginning of your Typescript journey, you may feel that you are writing more code, and it feels like it is taking more time than Vanilla JS, Typescript is still an important tool to create a large app.
It comes with many advantages such as type hinting, code completion, and auto import, but it also makes the code base self-documented, refactoring much easier, and it allows you to detect bugs in compile time rather than in run time.
3️⃣ Setting up Eslint and Prettier with your IDE
This will make your life much easier by taking care of auto formatting your code and by setting strict rules for your code style.
Eslint can find a lot of potential bugs, inefficient things and best practices (also things like accessibility for people with disabilities). And Prettier solves once and for all debates about correct code formatting and makes it easier and faster to navigate and understand foreign code.
4️⃣ Tests for your app
Usually, large-scale React apps are written by multiple developers. The best and only way to create a bulletproof app is by having enough unit test coverage for your app so refactoring can be less risky.
Most developers hate unit tests, and if you are one of them, I would encourage you to write integration/e2e tests that help you mimic real user usage.
5️⃣ Error handling
Almost every js app has try-catch blocks inside it, but unfortunately, some developers ignore what they are catching and only focus on the logic inside the try block. We should always try to log the errors thrown to our logging service and update the UI accordingly.
6️⃣ Follow SOLID principles
7️⃣ Good folder structure
Yes, React is not opinionated, and everyone can have their own preferences. Still, it is highly recommended to keep an organized and well-designed folder structure during the development of your large app. One good resource about this topic is this blog written by Robin Wieruch.
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Houssem TLILI is a software engineer, passionate about modern web technologies and focusing lately on frontend web development using React/React Native and typescript.