StrictMode is a tool for highlighting potential problems in an application.

like fragrament , StrictMode does not render any visible UI . It activates additional checks and warnings for its descendants.

Note: strict mode checks are run in development mode only ; they do not impact the production build.

StrictMode currently helps with :

• Identifying components with unsafe lifecycle
• Warning about legacy string ref API usage
• Warning about deprecated findDOMNode usage
• Detecting unexpected side effects
• Detecting legacy context API