Hi all together,
I combined the custom rendering and the Data source change event examples from this page: https://datatables.net/extensions/rowgroup/examples/
Instead of average salary in the custom rendering example, I used the sum() function to have the sum of salary for each city.
I now need to have a sort option which will sort the groups using the summed up value. When I now click on the last column the single elements in each city will be ordered, but I need the whole groups ordered using the summed up values.
So, e.g. London is the city with the highest over all salaries, the "London group" should be up, next the second highest salary group and so on.
This is my current script: https://pastebin.com/KkwYcmNG
Hope you can help me out here! I tried to built an example in jsfiddle, but I wasn't able to get the custom rendering example running on jsfiddle. If you have a jsfiddle link with this example running I am happy to add all further details of my code.
Thank you so much!