help me please

Well at first I tried to use Python, I took the source code and tried to use beautiful soup, then I found out that when I take the source code it’s give me a source code without me register, that means that i don’t have the textarea that I have needed.
Then I tried from a different way, i wrote a code on JavaScript on console, have inserted the list into array (printed the array, it was fine), but when I tried the sort() function an error was shown that it doesn’t know the sort() function.
can someone help me to figured it out in one of this ways?