First off, thank you very much for your fantastic work.

I have a JSON-based treegrid that auto loads a node at a time, and it is working very well except for the sorting function. It does not appear that there is an AJAX call made when the column header is clicked. The console logs the following error:

TypeError: Result of expression 'this.parent_id' [null] is not an object.

Also, the “Loading…” dialog stays floating above the grid. Does sorting work in this context?

Thanks,

John