<!DOCTYPE html> <html> <head> <style> body { height: 2000px; margin: 0px; padding: 0px; } .main { position: fixed; } .fixed { position: fixed; width: 100%; height: 100px; left: 0px; bottom: -100px; background-color: red; } </style> </head> <body> <div class="main"> This test is applicable on platforms that do accelerated compositing, can prepaint out-of-view contents and can scroll the contents into the viewport without repainting them.<p> The following settings need to be enabled:<p> - acceleratedCompositingForFixedPositionEnabled<br> - fixedPositionCreatesStackingContext<p> To test, scroll the page up and down. The test passes if there is no temporary or permanent red in the page. </div> <!-- An out-of-view fixed element that should be never visible --> <div class="fixed"></div> </body> </html>