fires on an item right click, before the native context menu is displayed

void onListBeforeContextMenu(string itemId,Event ev,HTMLElement node,object list);
itemIdstringthe id of the clicked item
evEventa native event object
nodeHTMLElementthe target HTML element
listobjectthe list object where click has happened


$$("myBoard").attachEvent("onListBeforeContextMenu", function(itemId,ev,node,list){
    // your code
    // block native context menu

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