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night-vision.js

javascript:(function(){var id='__invert_css';var existing=document.getElementById(id);if(existing){existing.remove();return;}var css='html{-webkit-filter:invert(100%);-moz-filter:invert(100%);-o-filter:invert(100%);-ms-filter:invert(100%);filter:invert(100%);background:#1a1a1a;}img,video,iframe{filter:invert(100%);-webkit-filter:invert(100%);}';var style=document.createElement('style');style.id=id;style.type='text/css';style.appendChild(document.createTextNode(css));(document.head||document.getElementsByTagName('head')[0]).appendChild(style);}());