javascript - Get css value with phantom js -


i using cucumber , capybara run automation tests chrome , have option run them headless phantom js

i trying background-image url value , can achieve with

element :errorcontainer, "body.error .message-container" alert = people_form.errorcontainer.native.css_value('background-image')

this return url, fails when running tests using phantom js 

nomethoderror: undefined method `css_value' #<capybara::poltergeist::node tag="div">

how can background-image url here please

thanks

try in way, hope give idea: 

page.find('div.user-image')['style'].should == 'background-image:url(/images/user_image.jpg)'

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