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How to scroll down with Phantomjs to load dynamic content

page.open(‘http://example.com/?q=houston‘, function () {

  // Checks for bottom div and scrolls down from time to time
  window.setInterval(function() {
      // Checks if there is a div with class=".has-more-items" 
      // (not sure if this is the best way of doing it)
      var count = page.content.match(/class=".has-more-items"/g);

      if(count === null) { // Didn‘t find
        page.evaluate(function() {
          // Scrolls to the bottom of page
          window.document.body.scrollTop = document.body.scrollHeight;
        });
      }
      else { // Found
        // Do what you want
        ...
        phantom.exit();
      }
  }, 500); // Number of milliseconds to wait between scrolls

});

How to scroll down with Phantomjs to load dynamic content