SpiderBasic

Posted: **Tue Nov 18, 2025 12:42 pm**

Hi,
at the moment I'm testing one big Android app compiled the first time with SB 3.1 on a lot of devices, starting with Android >= 10 everything seems to work, but on older Sunmi devices with for example Android 7.1.x, the app seems to run only until there is a CanvasGadget() defined, then the Procedure crashes with something like

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Uncaught ReferenceError: ResizeObserver is not defined (file:///android_asset/www/spiderbasic.js?t=xxx, line 3163

Keeping the app directory and looking in the line there is the window.spider_CanvasGadget=function definition with a new ResizeObserver.

I'm not sure, but with older SB I never had this error, is it possible, that it has to do with the in SB 3.1

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- Added: #PB_EventType_Resize support for ContainerGadget(), ScrollAreaGadget(), Canvas() and PanelGadget()

added new feature?

Or is it simply a problem of the new cordova-android 14.0 or Android SDK 35? I can't find any information about the supported Android versions...

I searched a bit and found some hints, for example to define a dummy

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!class ResizeObserver {
!observe() {}
!unobserve() {}
!disconnect() {}
!}

but putting this at the top of my app doesn't change anything.

Greets, hoerbie

Posted: **Fri Nov 21, 2025 3:31 pm**

Hi,
I did some further tests, and with SB <= 3.02 this error doesn't happen, so I think it is a regression from the in SB 3.10 added feature:

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- Added: #PB_EventType_Resize support for ContainerGadget(), ScrollAreaGadget(), Canvas() and PanelGadget()

And just in case anyone else stumbles across this error on the above listed SB gadgets, a temporary solution was to put the following code at the front of my SB file:

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! class ResizeObserver {
!   observe() {}
!   unobserve() {}
!   disconnect() {}
! }
! window.ResizeObserver = ResizeObserver;

I simply missed the last line in my first tests. For now I will include such code with an If clause only when running on old Android devices.

As we are actually in a Beta cycle of SB 3.2, maybe this could be fixed for the real 3.2

Greets, hoerbie

SpiderBasic

SB 3.10 App on older Android with CanvasGadget crash on ResizeObserver

SB 3.10 App on older Android with CanvasGadget crash on ResizeObserver

Re: SB 3.10 App on older Android with CanvasGadget crash on ResizeObserver