javascript - Portia Scrappy fails to load responsive -

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i installed portia on machine crawl content interactive supporting it. found headless browser, splash, can not load responsive images, i.e www.bbc.com

i knew portia removes javascript in html case may need render these images.

is there ways attach javascript in order to

  1. lookup placeholder elements
  2. replace placeholders transparent images
  3. update src attribute each image , assign best quality/size ratio url

like https://github.com/bbc-news/imager.js ?

i found function in portia project did not point, please give me hints try

def populate_window_object(self):         main_frame = self.tab.web_page.mainframe()         main_frame.addtojavascriptwindowobject('__portiaapi', self.js_api)         self.tab.run_js_files(             os.path.join(self.assets, 'splash_content_scripts'),             handle_errors=false)


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