Skip to content

Instantly share code, notes, and snippets.

Last active June 23, 2020 13:33
What would you like to do?
Disable CSS Animations in Poltergeist & Phantomjs. Phantomjs does not like to wait for animations, and you can run in to nasty test flickers because of it. This pattern will disable animations in test env, and not touch any app code.
# env.rb or spec_helper.rb

Capybara.register_driver :poltergeist do |app|
  opts = {
    extensions: ["#{Rails.root}/features/support/phantomjs/disable_animations.js"] # or wherever
  }, opts)

Capybara.javascript_driver = :poltergeist
// disable_animations.js
var disableAnimationStyles = '-webkit-transition: none !important;' +
                             '-moz-transition: none !important;' +
                             '-ms-transition: none !important;' +
                             '-o-transition: none !important;' +
                             'transition: none !important;'

window.onload = function() {
  var animationStyles = document.createElement('style');
  animationStyles.type = 'text/css';
  animationStyles.innerHTML = '* {' + disableAnimationStyles + '}';
Copy link

leorush commented May 21, 2017

Hi guys, you might like this approach, by using middleware:

Helped me a lot

Copy link

CJBridge's solution worked for us and seemed preferable over the middleware solution.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment