javascript - Im new to React, can someone tell me why is this happening...?

Question

This question already has an answer here: question from:https://stackoverflow.com/questions/65945052/im-new-to-react-can-someone-tell-me-why-is-this-happening

Answer 1

This might be caused by rendering your app in React.StrictMode, it causes dual-renders in development mode. https://reactjs.org/docs/strict-mode.html. It also suppresses console calls on subsequent renders, which may explain the difference you're seeing:

Starting with React 17, React automatically modifies the console methods like console.log() to silence the logs in the second call to lifecycle functions. However, it may cause undesired behavior in certain cases where a workaround can be used.