How to Audit and Clean Up Dependencies in Legacy Front-End Projects

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Legacy front-end projects often accumulate outdated, poorly documented dependencies over time as multiple developers contribute without consistent ownership. A developer maintaining one such project discovered the full extent of its dependency problems while attempting a routine Material UI update. Rather than updating blindly, they conducted a structured audit of each dependency to assess its purpose, usage, and whether a replacement would be more appropriate. The process highlighted key concepts including semantic versioning, the difference between dependencies and devDependencies, and the risks of transitive dependencies. Using Yarn, the developer systematically reduced technical debt, improved maintainability, and lowered the hidden risks associated with stale or unnecessary packages.

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