Getting a global JavaScript function or the document object

[aghasemi]

Hi,

I cannot get the js.document object in Python, as expressed in the code snippets here in docs. I use ShinyPy Live. The code is here.

Am I doing something wrong? Is there some working example of accessing a global JavaScript object from within Python/Pyodide code?

Thanks

[hoodmane]

Did you import js first?

[aghasemi]

Did you import js first?

Yes :))))
(See the linked code)

[hoodmane]

If you do import js; print(js) you see [object DedicatedWorkerGlobalScope] which means that Pyodide is running in a web worker. If you were in the main thread you would see [object Window]. So it's not possible to do direct DOM manipulation -- or if it is possible, the way to do it depends on the details of how the shiny runtime is set up.

[aghasemi]

If you do import js; print(js) you see [object DedicatedWorkerGlobalScope] which means that Pyodide is running in a web worker. If you were in the main thread you would see [object Window]. So it's not possible to do direct DOM manipulation -- or if it is possible, the way to do it depends on the details of how the shiny runtime is set up.

I see. Many thanks. So there is no way to circumvent it?

[hoodmane]

If the runtime is set up correctly it is possible to proxy Dom access to the main thread. But it's a bit technically complex to set up. You would have to ask the shiny folks whether they are interested in supporting such a thing if not you are out of luck.

[aghasemi]

Many thanks. I did.