title: How can I implement dark mode in react native app
body: <p>I want to add dark mode to my app. But the documentations are confusing. Is there any easy way to understand how to implement the dark mode. I also want the darkmode to stay active in my all app screens. And need to implement the mode in both ios and android. And I am using stacknavigator for navigating through multiple screens. I have tried one expo project could not achieve a satisfying result. Any help will be good and thanks.</p>