Hi Morgan,
Sorry for the inconvenience.
We’ve analyzed your sample in which the “ej.web.all.min” script file referred in the sample is in the older version (13.4.0.53).
Since, we have given databinding support for Groupbutton widget only in our latest update (14.1.0.46), the sample should have a reference to the latest version of “ej.web.all.min”.
You can find the CDN link for the latest Syncfusion widgets from the link provided below.
Also, please note that, the directives in anuglarjs should be used as dash-delimited attributes on DOM elements instead of camelCasing.
For example:
ej-groupbuttton – correct
ejGroupButton - incorrect
For your convenience, we have prepared a Groupbutton sample with databinding support. Please check in the JSPlayground provided below.
Please let us know if you have any further queries.
Regards,
Deepa L.