Your Choice JavaScript News

React News Wednesday, May 9 React, React component, React app & more…


What’s new?

  • 5 Tools For Faster Development InReact5 tools to speed the development of your React UI components and applications.
  • Using Bit you can organize components from your different apps and projects (without any refactoring), and make them accessible to discover, use, develop and collaborate on when building new features and applications.
  • Using Bit, you can develop multiple applications faster, collaborate as a team and use your components as building blocks for new features and projects.
  • This component rendering environment is also used in Bits live component playground.This official React Chrome devTools extension allows you to inspect the React component hierarchies in the Chrome Developer Tools.
  • You can have multiple stores or different instances for every React components local state.

Tags: React, React UI components, React component, React Native, React Chrome devTools


  • End-to-end testing React apps with Puppeteer andJestIn this tutorial, well see how to write tests for a React app using Jest and Puppeteer.
  • Write thetestsTo start off with the tests, well first write a test to check if theres a particular text on a page and also a test to see if a contact form submits successfully.
  • More testing!For the next test, well simulate and test submitting a contact form on the React app.
  • For the next set of tests, well write tests to assert the following: – Users can login – Users can logout – Users are redirected to the login page for unauthorized view – Nonexistent views/route returns a 404 page – The tests above are end to end tests that are…
  • In the test suite, the browser is directed to the login page which is routes.public.login and just like the contact form test, puppeteer is used to fill the form and submit it.

Tags: React app, tests, contact form, puppeteer, test


  • This is why you cant take full advantage of multiple core machines unless you use the cluster module or a process manager like PM2.
  • I was using the cluster module to – Run multiple processes of the app itself.Manage multiple child_processes for separate tasks like sending SMS, emails, notifications.In the code above, there is only one master in the cluster, I get one child process for each worker: – 1 smsWorker + 1 emailWorker…
  • The only thing left in this implementation is the process communication between the app workers and from app workers to the dedicated task (SMS/email/notif) workers.
  • After adding process communication, the final code looks like this: – I have defined global methods so that I can send messages from anywhere in the app to the worker.
  • Easy to implement process communication.Cons:You take a hit on performance of the app if there are too many messages.The implementation doesnt appear to be the best for managing communication of dedicated workers.You need to manage the process state by yourself (no automation).

Tags: cluster module, RabbitMQ, process manager, RabbitMQ exchange, RabbitMQ implementation


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Tags: Beautiful UI, VSCode Theme,


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