on_context

a property used to define custom context-click (right click) handlers for elements in a datagrid

 let on_context: EventHash

Example

var dgrid = webix.grid({
  data:[
    { text:"<div class='myActive'>click here</div>" }
  ]
});
dgrid.on_context.myActive = function(id, event, target){
  console.log("Active area was right-clicked");
};
//or
dgrid.on_context["myActive"] = function(id, event, target){
  console.log("Active area was right-clicked");
};

Details

It’s an object property that contains already available handlers.
All the handlers (existing and newly-added) are specified by the related class name.