save html output of page after execution of the page's javascript

Question

There is a site I am trying to scrape, that first loads an html/js modifies the form input fields using js and then POSTs. How can I get the final html output of the POSTed

Answer 1

This can easily be done with some php code and javascript use fopen() and fwrite() and this function to save it: var generatedSource = new XMLSerializer().serializeToString(document);