How to wait for page loading when using casperjs?

Question

I am trying to scrape a webpage which has a form with many dropdowns and values in the form are interdependent. At many point I need the code to wait till the refresh of the

Answer 1

Just evaluate document.readyState to be complete or interactive. Then it's loaded.

This is an implementation with a while, but maybe can be done with interval...

this.then(function () {
 while(this.evaluate(function () { return document.readyState != 'complete' && document.readyState != 'interactive'; })) {}
});