To test your app with this browser, enable transpilation in development mode.
Transpilation can be enabled by setting the vaadin.devmode.transpile=true
property for the deployment configuration using an application or a system property.
Note that transpilation is always enabled for the build-frontend
Maven goal, which is also used when creating a production build of the application.
Continue anyway
(eg. if you've setup ES5 transpilation in a custom webpack configuration)