ReactJS has a set of unique features that speeds up front-end development tremendously. The advantages are many, such as more transparent development, lower development costs and of course quicker-to-market launch date.
Some of the most successful companies today are using ReactJS for their apps, including Facebook (naturally), Shopify, Coinbase, Tesla, Pinterest, and Uber Eats.
First, we’ll go over the advantages of working with ReactJS for development, then we’ll go into details about what you should look for in a ReactJS developer, the skills they should possess, and a quick summary of what they entail, so you can analyze their answers and make a decision based on that.
The advantages of using ReactJS for development:
ReactJS is the most used framework in 2021 with over 40% of developers choosing that as their preferred tool. The remaining 60% of software developers are spread across using 17 different competitor frameworks, such as JQuery, Angular, and ASP.NET Core.
The 5 most distinguished features of ReactJS are:
- One-way data flow: ReactJS has unidirectional data flow, making it impossible to edit any component directly. Instead, developers have to pass a state to the view and child components, actions are then initiated from view and updating the state.
- Fast performance: One of the core goals for React is unparalleled performance delivery. Unlike competing frameworks AngularJS and jQuery it uses one-way data flow, and that makes for fast web and mobile apps that excel by only updating necessary properties delivering an overall faster user experience.
What to look for when hiring a ReactJS developer
When you are looking to hire a ReactJS developer, make sure he/she has knowledge and experience with the topics below when it comes to building web or mobile apps.
Too often developers have shown to be good at coding, but not at designing (and rightfully so). Developers should however have a basic understanding of UI design.
A good ReactJS developer should also understand DOM manipulation, hoisting, functions, and even bubbling.
A good comprehension of how to do quality testing on their code
Knowing how to test the code for any bugs during development is essential for any good ReactJS developer, in order to mitigate any risk factors immediately and not end up with unstable apps that will require extensive re-coding or in the worst case a complete rebuild.
The most popular tools for quality assurance that you should ask if your developer knows some or all of are listed below.
For Unit Testing in ReactJS Development
- Enzyme – this tool is not a testing framework, but a useful tool in combination with some of the testing frameworks above. A popular combination is using Jest and Enzyme in tandem to test your mobile app or website. An enzyme can render components for a live preview and display elements for interaction testing.
For Integration testing in ReactJS Development
For end-to-end testing in ReactJS Development
- Selenium WebDriver – When you are going to do end-to-end testing, Selenium should not be overlooked. It’s one of the most widely used tools for automation testing and a functional cross-platform testing tool, complete with predefined interactions void of any human input.
- Cypress – this testing tool is a viable alternative to the popular Selenium. Contrary to Selenium, it is not dependent on any driver binaries to run on a real browser. It is easily configured in an intuitive dashboard and in addition to the great testing capabilities, it also has a quite neat reporting tool.
Does the developer know how to work with Version Control Systems (VCS)?
It doesn’t matter whether you work with web or app development projects, version control is unavoidable for any project with more than one developer staffed, which frankly most projects are unless they are an indie production.
With multiple developers making changes to the code, it’s necessary that version control software helps manage the files, so they are locked whenever a developer is working on it. Version control also provides roll-back points, similar to a time machine, so if it becomes necessary to go back to an earlier date, VCS provides this option.
VCS additionally enables developers to review old code and make comparisons between old and new code. That also makes it possible to revert any changes that worked previously, while pinpointing the exact spot needing to be fixed.
A ReactJS developer should be well-versed in using VCS tools such SVN, TFS and the very popular Git. Git gives developers their own repository where they can manage the development using push, pull, add, and commit commands.
Both SVN and TFS are using centralized source control, whereas Git is distributed. TFS has the best integration into Visual Studio and in addition to source control, also provides issue tracking, reporting, virtual labs for testing, and document management.
Knowledge of related ReactJS Development technologies
Experience with backend technologies like Ruby on Rails or Django is also a plus, so they understand how to combine the technologies in the best possible way.