This is another useful extension that that allows you to incrementally add types to your JavaScript code. Working in a codebase with lots of developers can make it difficult to keep your master branch working. Flow can help prevent bad rebases. Flow can help protect your carefully designed library from misuse and misinterpretation. Flow uses .flowconfig for flow rules.
Flow errors can be checked by executing the below yarn command
yarn run flowLearn more about flow from below resources: