In TreeGrid, the customization of grid cells can be done by using QueryCellInfo client-side event. This event is triggered at load time of the control. User will get cell values, cell element, columns and the record value in the function argument. With those information, we can customize that cell at load time. The below code snippet explains how to highlight a cell of a duration field.
A sample with customized cell with condition is available in the following link,
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