Tips and tools.
codemod is a tool/library to assist you with large-scale codebase refactors that can be partially automated but still require human oversight and occasional intervention.
https://github.com/facebook/codemod https://github.com/styled-components/styled-components-codemods https://github.com/styled-components/styled-components-native-code-mod
Depcheck is a tool for analyzing the dependencies in a project to see: how each dependency is used, which dependencies are useless, and which dependencies are missing from package.json.