Error running javascript: TypeError: undefined is not a function

[indigoviolet]

I believe I have emacs with xwidgets support (I can do xwidget-webkit-browse-url, for instance), but this package only renders a blank white popup for me, and I see the following errors in terminal:

** (emacs:16002): WARNING **: 13:02:06.764: Error running javascript: TypeError: undefined is not a function

** (emacs:16002): WARNING **: 13:02:06.764: Error running javascript: undefined:1:39: TypeError: null is not an object (evaluating 'document.querySelector('.katex-html').offsetWidth')

** (emacs:16002): WARNING **: 13:02:06.764: Error running javascript: TypeError: undefined is not a function

Any pointers would be appreciated.

[fuxialexander]

Sorry for the late replay...It's apparently a JS problem but I'm afraid at the moment I have no idea where it lies...Could be Katex itself not been successfully imported.

You may try to evaluate the following code and see whether the situation changes

(defun webkit-katex-render--resize() nil)

If not, the problem is probably that Katex is not functioning/imported

[indigoviolet]

Yeah, it doesn't seem to fix it. Can you give me any pointers as to where to look at the JS that should work? How can I investigate whether Katex is working?

[indigoviolet]

Digging into the file a bit, I think it's the try_render function that is not being found -- when I change that to something else like document.body.innerHTML += %s, I see the effects in the webkit buffer.

[indigoviolet]

Some more progress: I was setting --client-path incorrectly, so it wasn't finding the right katex.html. Once I fix that, and set --buffer-name to something else, like "webkit-katex" that I can actually inspect myself, I see that the Latex is being rendered in the webkit, but it still won't render in my org-mode buffer. I still see errors like

** (emacs:12687): WARNING **: 21:16:06.817: Error running javascript: undefined:1:39: TypeError: null is not an object (evaluating 'document.querySelector('.katex-html').offsetWidth')

** (emacs:12687): WARNING **: 21:16:06.831: Error running javascript: TypeError: undefined is not a function

** (emacs:12687): WARNING **: 21:16:06.848: Error running javascript: TypeError: null is not an object

** (emacs:12687): WARNING **: 21:16:06.848: Error running javascript: TypeError: null is not an object

Any ideas on how to dig further?