Do not use tooltip in the left table area. How to implement it

Do not use tooltip in the left table area. How to implement it?

Hello,
If you don’t want to see the tooltip when the mouse is over the grid, you can return the empty tooltip for the grid using gantt.ext.tooltips.tooltipFor() method:
Tooltips for Gantt Elements Gantt Docs ;
Please check the example of how it might be implmented:
https://snippet.dhtmlx.com/5mframct ;