geogebra_file() not loading.

[William Haynes]

Most of my problems use geogebra_applet() with a material ID to load the ggb applet, but I have a few where I have saved the .ggb file as a resource and load it with geogebra_file() instead.

These seem to have stopped working.  Now they all hang with "Geogebra applet loading...", even in the editor, and the console shows: TypeError: null is not an object (evaluating 'd.app.exists').

Here's an example: https://numbas.mathcentre.ac.uk/question/37308/vector-addition-by-summing-scalar-components-easy/

Thanks for looking into this.

Will

[Christian Lawson-Perfect]

Oh, sorry about that. I've probably broken something and not tested geogebra_file. I'll have a look now.

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[Christian Lawson-Perfect]

Actually, I think there's an error when loading this file in Numbas. I'm not sure why - it works when I embed it in a standalone page.

Turning on logging, I get an error message "error in <spreadsheetView>: prefCellSize".

So there are two things for me to do: make sure those errors get logged in normal use, and work out what's causing that error.

[Christian Lawson-Perfect]

I was wrong - it doesn't load properly standalone, it's just that the error happens after the point where the applet becomes visible and interactive.

I'm going to chase this up with GeoGebra, I think. Here's a minimal example, using your file: https://geogebra-load-file-error-2025-02.think.somethingorotherwhatever.com/index.html

[Christian Lawson-Perfect]

OK, I think this will be my last addition to this thread: the problem is that the `prefCellSize` element in the geogebra XML has a `height` attribute but not `width`.

Did you make this file with the GeoGebra desktop app? If you didn't edit it by hand, then I think this is a bug in either the GeoGebra desktop app or the JS loader. If you want to follow this up, you could report it to GeoGebra.

[William Haynes]

Christian,

Thank you for looking into this.    Yes, I made this file in the desktop app, maybe five years ago. 

I don't know if this is relevant or not, but this commit made yesterday might mean that  a fix is on the way. 

Will

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[William Haynes]

Here's the link:  https://github.com/geogebra/integration/commit/8744ffee45970e78bfc907adb47f6f11d813e398

On Feb 26, 2025, at 8:56 AM, William Haynes <wha...@maritime.edu> wrote:

Christian,

Thank you for looking into this.    Yes, I made this file in the desktop app, maybe five years ago. 

I don't know if this is relevant or not, but this commit made yesterday might mean that  a fix is on the way. 

[Christian Lawson-Perfect]

That's timely!

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[William Haynes]

Christian,

I followed up on this problem here: https://www.reddit.com/r/geogebra/comments/1jn0439/spreadsheetview_prefcellsize_no_width/, and mike_geogebra suggested the fix is to change

options.appletOnLoad = function() { var app = applet.getAppletObject();

To

options.appletOnLoad = function(api) var app = api;

These are lines 142-143 in the geogebra.js. I tried it locally, and it worked for me.

Will

​

[Christian Lawson-Perfect]

Thanks, Will!

I don't know how that fixes the problem, but I can't argue with the fact that it does. I've updated the extension as suggested.

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[William Haynes]

Christian,

Thanks.  Questions are working for me again, however the "GeoGebra applet loading..."   message is still showing up in the editor when inspecting variables, so I suppose a similar fix is needed there.

Will

[Christian Lawson-Perfect]

Sorry it's taken me a while to get back to this!

I think that you must have still had the old version of the extension cached in your browser for the editor. It looks to me like it's working now.

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[William Haynes]

Thanks,  it's working for me now too.  I'm glad to have geogebra_file() function working again!

Will

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