Usually, the source code consists of many files, nested inside multiple directories. We can transpile each file and place them next to the corresponding source file, but this is not ideal as it is hard to separate the distribution code from the source. Therefore, it's preferable to separate the source and distribution code into two different directories.
Therefore, let's remove the existing compiled.js, and create two new directories called src and dist. Also, move the index.js file into the src directory:
$ rm compiled.js$ mkdir src dist$ mv index.js src/
Now, we should build our project again, but this time supplying the -d flag to the Babel CLI, which will compile files in our src directory into ...
