Release notes

• [new feature] filter, here is an example

        var chart = new OrgChart(document.getElementById("tree"), {
            filterBy: 'all',
           //filterBy: ['county', 'title'],
        });

• [new event listener] node-initialized

        chart.on('node-initialized', function(sender, args){
        });

• [new event listener] node-layout

        chart.on('node-layout', function(sender, args){
        });