title: How to find all the react compiled files?
body: <p>I am now working on a react ecommerce website and I have encountered an issue that I forgot to give keys to the lists I rendered. So, I was wondering if there is a way to see one file which contains all the code for that  web app, like in Sass , we write code in different files but we are able to see the massive file that contains all the code that we wrote across multiple files.Even if we can't change that file, it would be nice to see how many lines of code are there. So ,is there a way to do that?</p>