problem

On a device with a touch screen the browsers are enabling automatically some additional javascript events to be used.

In firefox ExtJS 6.2 is not usable at all, therefore translate5 is also not usable.

In chrome only visual review (clicking into the visual iframe) was not working.

simple test

Just enter the following JS code into the console:

'ontouchstart' in window 

it should return false. If the statement returns true the additional touch events are enabled.

background

https://stackoverflow.com/questions/43236899/extjs-6-2-classic-does-not-work-with-firefox-and-a-touchscreen

workaround

As workaround the touch support can be disabled in the browsers:

chrome:

disable it as explained in https://ccm.net/faq/40811-google-chrome-how-to-disable-touch-input

firefox

Navigate to about:config and search for the setting dom.w3c_touch_events.enabled

By default it is set to 2, set it to 0 to disable it.

solution

Either we can nearly update to a newer ExtJS version where this issue is fixed, or we should implement a workaround as described in https://stackoverflow.com/questions/43236899/extjs-6-2-classic-does-not-work-with-firefox-and-a-touchscreen