I created a canvas element where I can draw paths. There, I draw transparent paths and I "scratch" reveal the foreground. It works on both mobile and desktop.
highchartstock
google-cloud-healthcare
instagramapi-mgp25
panzoom
fmodf
environment-modules
consumer
ggnet2
implicit-parameters
shred
triggers
shrinkresources
lotus-formula
valuechangelistener
fbspectrum
dx
terraform-template
accessible
publisher
ngx-doc-viewer
failing-tests
node.js-buffer
menubar
content-negotiation
stateless-state-machine
stdoptional
link-to
mysql-error-2003
cinnamon
filehandler