onGridHeaderClick

fires when the user clicks on the grid's header

name	string	the name attribute of the column which header the user clicks on
e	Event	a native event object

boolean

defines whether the default action of the event will be triggered (true) or canceled (false)

Example

gantt.attachEvent("onGridHeaderClick", function(name, e){
    //any custom logic here
    return true;
});

Returning false will cancel the default handler (adding a new task on the "plus" button click or sorting a column)

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