There are several approaches to debugging in ReactJS:
1. React Developer Tools: This is a browser extension available for both Chrome and Firefox. It allows you to inspect the entire React component tree, including component hierarchy, properties, state, and more.
1. Console.log(): Using console.log() in your code is a primitive yet handy way for debugging. It allows you to log relevant data in the console that can help you understand the flow and state of your application.
1. Breakpoints: You can also set breakpoints in your code using developer tools provided by browsers. This will pause code execution at the point where the breakpoint is set, allowing you to inspect current variables, run commands in the console, and proceed execution step by step.
1. Use Error Boundaries: In React 16, Error Boundaries were introduced. These are React components that catch JavaScript errors anywhere in their child component tree and display a fallback UI instead of the component tree that crashed.
1. Using Third-party tools: Some third-party libraries (like LogRocket, React Sight etc.) can provide additional support for debugging React applications.
1. Testing Tools: Tools like Jest and Enzyme can be a great help for debugging by allowing you to write unit tests for your components.
1. Linter Tools: Linter tools like ESLint help you to find errors while writing the code, which makes it easier to debug.
1. Network Tab in Developer Tools: Use the network tab in browser developer tools to debug API calls, their responses and potential error messages.
Remember, the way you debug would vary depending on the type of issue you’re facing. It’s important to understand not only how to debug, but when to use which debugging tool.
