Hello Apeksha,

If you really want to change the cell’s background, you won’t be able to achieve it using the template property of the column. It could help you in case you wish to customize the contents of a cell, you may be able to simulate a change in the cell’s background, but you won’t actually modify the cell itself.

In order to achieve what you want, you may wish to bind yourself to the rowsRendered function. It is useful because it is called after all the visible rows are rendered.

There, you will need to provide the lookup column’s key. Said otherwise, the key of the column, which you’d check for emptiness. That index will we name lookupColIdx.

Another mandatory key is the one of the column, which cells’ backgrounds you’d like to edit. We will call it targetColIdx.

After having them, you will be able to get the indices of the two columns.

You must find the indices of the rows, where the empty fields occur, as well. That is possible with an iteration through the rows. There, you will check whether the value of the cell with lookupColIdx and rowIdx is empty or not. If it is, you will add the class colExpired to the cell with targetColIdx and rowIdx.

I’m providing you a jsFiddle with detailed comments, which would help you in understanding the explanations of mine.

http://jsfiddle.net/blackbull/btv0kc61/

If you have any further questions, regarding the matter, don’t hesitate to contact me.

Best regards,
Petko Bozhinov