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How to Read Code

Step-by-Step Guide to Reading Project Code

  • Start by understanding the project’s “identity” and “goal.” Read the README.md — it’s the project’s manual. It usually explains the project’s purpose, how to run it (install, build, start commands), and the tech stack (React? Express? Django?).

  • Understand the directory structure: Entry files / page routes / shared components / style sheets / API or data layer / configuration files.

  • Begin with the first loaded page: When a user opens the website, which page do they see first? Trace how this page loads its data and renders components.

  • Follow the data flow and component tree: Use browser dev tools, breakpoints, or console.log to trace where the data goes. Each time you understand a page or module, summarize its purpose and composition.