Debugging is one of the crucial activity during the software development. It refers to the process of identifying an error in a software application that causes performance issues, then analyzing the issue, and finally resolving it. Debugging allows you to validate your code and fix issues before pushing a software application into the production stage. However, debugging issues are likely to arise during various phases – development, testing, and even production/post-deployment. And, implementing the right debugging tools and methodologies will speed up development and enhance the efficiency of the end-product.

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Coming to React Native debugging; the framework is made up of different environments, the most prominent being Android and iOS. As a result, it becomes challenging to debug apps due to multiple platforms involved. Moreover, React Native offers a huge variety of tools for debugging which seems confusing for many, particularly newbies. This post guides you through some effective practices and useful React Native and React debugger tools that will help you to identify issues and fix them like an expert.

React Native Debugging Methodologies and Best Practices

Identifying and Addressing Console Errors, Warnings, and Logs

Console errors and warnings are visible in the form of on-screen notifications with a red or yellow badge.

Errors

Errors will be displayed inside a RedBox with the command console.error(). This RedBox contains a description of the error and also a suggestion on how to resolve the error. Take a look at this example. If you write a style property that the React Native framework doesn’t support, or if you write a property meant to be used for a particular element (like a backroundImage needs to be set for the element View), then the RedBox shows an error along with the list of supported style properties that can be applied to the View.

Warnings

Warnings will be displayed inside a YellowBox with the command console.warn()Such warnings include information on performance-related issues and deprecated code. Most of these warnings indicate some bad practice within your code. Examples of warnings include a notification about the presence of an eventListener that isn’t being removed, the presence of deprecated features and dependencies, etc.

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