I can and have done that for different task types already. What I am trying to do is completely turn off tooltips for specific tasks. I'm not sure that's feasible. Here's the latest version I tried - all selected items are as required, just am unable to turn off the tooltip for some tasks. Not setting anything in the tooltip template causes a small, empty tooltip to display.
functiononDataBound() { vargantt = this; ... gantt.element.find(".k-task-single").each(function(e) { this.style.border = "0px"; this.style.height = "20px"; varz = this; varxx = $(z).find(".taskProj"); // a class I added to a span inside the wrapper div in the task template varxxx = xx[0]; // there should only be one item in this array if($(xxx).data("pid") === null) { $(z).tooltip.visible = false; // this isn't working } });}