-Check package.json, identify dependencies, scripts, and entry points

-Review tsconfig.json: Learn about compiler settings, path aliases, and strictness levels.

-Understand folder structure: like src/ components/ utils/ hooks/

-Read test cases like tests/ or tests : these contain unit and integration tests.

-Trace the flow.Looks for index.ts file, they often serve as entry points.

-Follow imports to understand how modules connect.

-Explore interface and types which are often used.

-Use UNKNOWN instead of any for safer type handling.

-Run tests locally to observe how modules interact.

-Use SOURCEGRAPH or CodeTour to visualize codebases.

-After understanding , teach the codebase to someone.

-Draw a sketch or diagram if possible.