cglowe ,
Please check if this script works for you :
widget.on('ready', function(){
$('div[class*=table-grid__content__inner]').map(function(i, cell) {
if(cell.innerHTML == " " || cell.innerHTML == "") cell.innerHTML="-"; //change the condition based on requirement
})
})-Hari
Another solution is to use Pivot2 API :
widget.transformPivot(
{
type: ['value']
},
function setCellBackground(metadata, cell) {
if(cell.content.trim() == '')
cell.content = '-'
}
)-Hari
