{"id":28942,"date":"2026-06-03T06:13:41","date_gmt":"2026-06-03T06:13:41","guid":{"rendered":"https:\/\/www.tftus.com\/blog\/?p=28942"},"modified":"2026-07-03T09:23:02","modified_gmt":"2026-07-03T09:23:02","slug":"how-to-debug-reactjs","status":"publish","type":"post","link":"https:\/\/www.tftus.com\/blog\/how-to-debug-reactjs","title":{"rendered":"How to Debug ReactJS: Step-by-Step Guide for Faster Issue Fixing"},"content":{"rendered":"\t\t
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Every ReactJS developer has encountered confusing bugs. \u00a0Bugs may not provide much information and hinder development. Good debugging skills speed up problem-solving.<\/p>\n

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But now there are many tools to make it simpler. React Developer Tools, Chrome DevTools, and Visual Studio Code provide insights. But how to choose the right tool?<\/p>\n

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Here’s an overview of common debugging techniques and tools. You’ll discover breakpoints, call stack, and performance profiling. You’ll also learn good habits to speed up debugging.<\/p>\n

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According to the 2025 Stack Overflow Developer Survey<\/a>, more than 49,000 developers participated in reporting their development workflows and tooling preferences, highlighting the importance of effective debugging practices in modern React development.<\/p>\n

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Why is debugging React applications different?<\/h2>\n

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Debugging ReactJS is more complicated than JavaScript. It includes a virtual DOM component that renders async state and hooks. Stacks may refer to compiled code.<\/p>\n

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Stack trace will involve React internals. Components may break on changes. You need to monitor renders of the component tree and data flow.<\/p>\n

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How to Debug React Applications: A Step-by-Step Guide<\/h2>\n

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Step 1: Install React Developer Tools<\/h3>\n

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React Developer Tools is a Chrome extension that adds two new tabs to Chrome DevTools: the Components tab and the Profiler tab. Look for “React Developer Tools” in the Chrome Web Store.<\/p>\n

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Once installed, open a React application and press Ctrl+Shift+I (on Windows)<\/em> or Cmd+Option+I (on Mac)<\/em> to open DevTools. You’ll have two new tabs in the panel.<\/p>\n

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The extension icon in the DevTools toolbar also provides visual feedback. Red is a production build, orange is a development build, and no light means no React.<\/p>\n

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Step 2: Use the Components Tab<\/h3>\n

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The Components tab displays all components rendered on your React page as a tree. Click on a component to view its props, state, and hooks on the right.<\/p>\n

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You can modify props and state in the panel, and see the component automatically update. It’s the quickest way to inspect what data is present within a component.<\/p>\n

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You can also search for a component name. This is a great debugging tool for large apps with hundreds of components.<\/p>\n

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Step 3: Breakpoints in Chrome DevTools<\/h3>\n

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A breakpoint is a line where the code execution pauses. In the Sources tab of Chrome DevTools, find your file in the tree on the left and click the line number you want to pause.<\/p>\n

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A blue dot appears on the line. The code will pause there on the next run, and you will see all of the variable’s values in scope.<\/p>\n

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Source maps are important here. They’re automatically generated by a Create React App project when you’re in development mode, and allow DevTools to show the correct source file, not the bundled file.<\/p>\n

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Listen: Mastering Browser Debugging Techniques<\/strong><\/p>\n

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This episode explores practical debugging workflows using Chrome DevTools, including breakpoints, call stacks, variable inspection, and browser-based troubleshooting techniques that apply directly to React applications.<\/p>\n