Why Drga and Drop Funcationality is not working with Crome brower?

[Yash001]

I have created Qt application using Qt 5.15.2 version, and install the emsdk 1.39.7.
My GUI build sucessfully app.html file, and open in Crome brower but after dragging single elements on drag area. It is not drage second element.

After I have update Qt 6.5.1 and install emsdk 3.1.25 version. It is build correctly, and generat the app.html file. OPen in brower. But it is not dragging the first element also.

First time I am using Qt WebAssembly. any one have any suggesion.

clone: emsdk from https://emscripten.org/docs/getting_started/downloads.html
install: cd emsdk && emsdk install 3.1.25
activate: emsdk activate 3.1.25

my application has mostly drag and drop funcationality, and Qpainter event. and Custome events and few mouse events, and image

any one have idea what should I need to do in order to run my application?