Strict Mode

You should use Strict Mode

Strict Mode is a tool used for showing any potential problems in a React app, create-react-app uses it as default. It doesn't render any visible UI and it does not impact production builds. Strict mode will catch: Unsafe lifecycles within Class components; Legacy usage of ref and context APIs; Unexpected side effects; and Depecated findDOMNode usage. React frameworks such as NextJS can enable strict mode too.