![]() ![]() As you can see, it’s a basic React application that consists of seven components (About.js, AddTask.js, Button.js, Footer.js, Header.js, Task.js, Tasks.js): The React.js package installed on your projectĪn existing React app that you can debug (or you can use the Create React App to start a React app from scratch)Ī source code editor with React syntax highlighting, such as Visual Studio CodeĪ web browser with developer tools and Incognito mode, such as Google Chromeįor this guide, I’ll use Brad Traversy’s task tracking application - you can watch his React crash course on YouTube where he shows step-by-step how to build this application.Īfter setting up the project, this is what it looks like in Visual Studio Code. To debug a React app, you’ll need to set up the following development environment:Ī local Node.js server installed on your computer (you can download Node.js from here)Ī Node.js package manager, such as npm or Yarn However, with thorough testing, including regression testing and continuous monitoring, you can prevent new features from causing regressions in existing behavior. React apps that grow fast can be prone to this type of error. Regression bugs refer to features that used to work in the past but have stopped working, usually after a new code release. Network bugs can also result from the wayward behavior of third-party services your React application relies on - in this case, you’ll need to troubleshoot the issue together with the service provider or find another service. This can apply both to requests sent to your own server and third-party assets such as embedded content or static files stored on a CDN (Content Delivery Network). Networking errors happen when a network request fails and one or more resources don’t download correctly or fast enough. These bugs are harder to detect, as they aren’t visible on the screen like UI errors, don’t always result in a crash, and don’t always throw an error message. Logic errors are bugs in the behavior of an application - in other words, it doesn’t perform one or more operations in the expected way. UI bugs are usually easier to recognize, as you can see that something doesn’t look quite right on the screen (for example, an element such as a button or the layout itself). React apps are rendered from reusable components, so the user interface doesn’t always end up the way you expected. React errors can be grouped into one of the following four categories: While some React bugs throw error messages so that you know what has gone wrong, there are also silent errors that you can only identify with debugging and monitoring. Some React debugging tools we’ll discuss later in this guide (Visual Studio Code and Raygun) also allow you to debug React applications rendered on the server side. You can treat these SSR React apps as Node.js applications and use Node.js debugging tools and best practices to resolve the arising issues. Server-side rendering (SSR) is a popular web performance optimization technique that many React applications take advantage of. However, not all React apps are rendered in the browser. When it comes to debugging applications created with these libraries, you can treat them as regular client-side React applications and use the same debugging tools and techniques (see a guide to debugging React Native apps here). Some examples are MUI (Material UI), React Bootstrap, and Fluent UI for web-based user interfaces, Gatsby and Docusaurus for static site generation (SSG), and React Native for native app development. In addition to the core React framework, there are also many React-based client-side libraries you may need to debug. As React is a JavaScript library, React debugging is a type of JavaScript debugging, and you can use many of the same techniques and tools that you’d use for debugging regular JavaScript code. ![]() React debugging is the process of finding and resolving errors in a React application. The 4 most common types of React errors. ![]() In this guide, we’ll look at the ins and outs of React debugging, take a peek at the most common React bugs, and see the best React debugging tools available today. To create a high-quality React application, you can’t skip over the debugging phase of your software development life cycle including everything from addressing error messages coming up in the development phase to monitoring live errors in production. ( 2736 words)Īs React is the most popular JavaScript framework for creating component-based applications, you have access to a solid ecosystem of tools, resources, and best practices that can help with React debugging when something goes wrong. The 2023 guide to React debugging By Anna Monus | Posted | 13 min. ![]()
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