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.
xdt
puppetlabs-apache
swingworker
sized-box
rebase
spring-saml
messageformat
contact-form
visual-studio-power-tools
monarch
route-parameters
nextion
pass-by-reference-value
imports-loader
arithmeticexception
angular-meteor
flask-restplus
couchbase-java-client
laravel-collection
system.data.sqlite
hikaricp
stardog
end-to-end
branching-and-merging
pager
vaadin
oslog
parboiled
welcome-file
mesh-collider