Timeline template cell value

is possible to fire the “scheduler template cell value method” only after an event is edited?

scheduler.templates.<timelinename>_cell_value = function folderCellContent(evs, date, section){
        if(section.children){ // do stuff}
    return // css class

Unfortunately, at the moment there is no such possibility. Could you clarify what you want to end up with? Also note that scheduler.templates.timeline_cell_value fires every time the event changes. To fire these templates, you need to call a full redraw of the scheduler - scheduler.setCurrentView() or scheduler.render()
Here is an example: https://snippet.dhtmlx.com/b5s4grxp. Please open DevTools and make changes to any event.