You barely have to build it, there is a great open source project already available. Not sure if it does everything diff.io does but it's a great resource to do

You barely have to build it, there is a great open source project already available. Not sure if it does everything diff.io does but it's a great resource to do a lot of it. https://github.com/webdriverio/webdrivercss https://github.com/webdriverio/webdrivercss https://github.com/webdriverio/webdrivercss-adminpanel https://github.com/webdriverio/webdrivercss-adminpanel