html, body {

    width: 100%;

    height: 100%;

    margin: 0;

    padding: 0;

}

button {

    margin: 10px 0 0 10px;

}

#container {

    position: absolute;

    width: 100%;

    top: 35px;

    bottom: 0;

}

anychart.onDocumentReady(function () {

​

    // create data

    var data = [

      {name:   "Root", children: [

        {name: "Child 1",  value: 80636124},

        {name: "Child 2",  value: 65511098},

        {name: "Child 3",  value: 64938716},

        {name: "Child 4",  value: 59797978},

        {name: "Child 5",  value: 46070146},

        {name: "Child 6",  value: 38563573},

        {name: "Child 7",  value: 19237513},

        {name: "Child 8",  value: 17032845}, 

        {name: "Child 9",  value: 11443830},

        {name: "Child 10", value: 10892931}  

      ]} 

    ];

​

    // create a data tree

    treeData = anychart.data.tree(data, "as-tree");

​

    // create a chart and set the data

    var chart = anychart.treeMap(treeData);

​

    // set the chart title

    chart.title("Tree Data Model: Removing");

​

    // set the container id

    chart.container("container");

​

    // initiate drawing the chart

    chart.draw();

});

​

// remove the last child

function removeItem() {

  var lastChild = treeData.getChildAt(0).getChildren().length - 1;

  treeData.getChildAt(0).removeChildAt(lastChild);

}