This is mostly satire and partly an exploration of deprecated web technologies. This app uses serverside image maps to render a shared canvas that is stored on the server. You should not use this in real-world apps.
Clicking on a black pixel turns it white. Conversely, clicking on a white pixel turns it black. The canvas is publicly shared by all app users.
This app was created with heart emoji by Rick Carlino
The sourcecode is available on Github under the MIT license.