Creating the same webpage out of Codecademy environment


I am trying to make a replica of this Status Update module in my own environment, trying to make it fully functional status posting app connected to a database.
I wanted to know that after writing a post why doesn't it gets posted just like it does in the Codecademy environment, even when i am using the exact same code.
Is there any more code that is kept hidden from the coding ground in Codecademy?

Replace this line with your code.


In your index.html file you should change

    <script src="//"></script>


    <script src=""></script>