fires when a user clicks the right mouse button inside the Gantt chart (see the details)

void onContextMenu(string|number taskId,string|number linkId,Event e);
taskIdstring|numberthe task id
linkIdstring|numberthe link id
eEventa native event object


gantt.attachEvent("onContextMenu", function (taskId, linkId, event) {
    var element = event.target;
    console.log("You've clicked on the ", element)
    return true;

Related samples


Right clicks in the Gantt chart open the default browser context menu, if there are no other conditions. In the following example a click on a task shows a DHTMLX context menu and hides the default browser context menu.

//requires DHTMLX menu component
gantt.attachEvent("onContextMenu", function (taskId, linkId, event) {
    const x = event.clientX+document.body.scrollLeft+document.documentElement.scrollLeft;
    const y = event.clientY+document.body.scrollTop+document.documentElement.scrollTop;
    if (taskId) {
        menu.showContextMenu(x, y);
        return false;
    return true;

Don't forget to include either files of DHTMLX Menu or DHTMLX Suite on the page. Otherwise, the example won't work.

Check another example if you need to add a custom context menu in pure JavaScript.

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