SonarQube is an open-source platform that allows you to continuously inspect and measure code quality as you develop your project. It provides static code analysis for code issues, security issues, and code smells in various programming languages, including Swift. This helps development teams maintain and improve code quality by identifying and finding issues in the development lifecycle, if paired with a good testing methodology it can make a difference in your app quality.
ReactJS is undoubtedly the most popular library for developers to build web and mobile applications. Its community is vast, so you get all the support you need as a developer while building applications. However, ReactJS is just a library for user interface development. It encourages us to build applications with the component architecture, which follows a tree hierarchy.