Old copies of Progressive Web Apps

 If a webpage is a 'Progressive Web App' (PWA) then someone may have an installed copy of the webpage that is old.


I copied some images into a sub-directory to try to speed up the access time. But I cannot remove the original images from the top directory because an old PWA might use the original images. So it is just a little bit slower accessing the new copies of the images in the sub-directory.


I tell Chrome the webpage is a PWA by registerng a 'do-nothing' service-worker.  Chrome warns about having a 'do-nothing' service-worker as it needs to be loaded which takes time. 




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