html, body, #container {

    width: 100%;

    height: 100%;

    margin: 0;

    padding: 0;

}

anychart.onDocumentReady(function () {

    // To change the way how context menu looks you need to change CSS.

    // By default CSS from AnyChart CDN is used: https://cdn.anychart.com/releases/8.13.0/css/anychart-ui.min.css

    // Download it, alter, upload to your server and link from your pages to change the look.

​

    var data = getData();

​

    var chart = anychart.heatMap(data);

​

    // Get context menu.

    var contextMenu = chart.contextMenu();

​

    contextMenu.itemsFormatter(function (items) {

​

        items['custom-item'] = {

            index: 1000,

            text: 'Custom Context Menu Item',

            action: actionHandler

        };

​

        return items;

    });

​

    function actionHandler() {

        alert('Custom Item Clicked');

    }

​

    chart.title('Get and modify context menu. Right-click on the chart');

    chart.container('container');

    chart.draw();

});

​

function getData() {

    return [

        {x: 'California', y: '2004', heat: 1704211},

        {x: 'California', y: '2005', heat: 2782680},

        {x: 'California', y: '2006', heat: 2992679},

        {x: 'Illinois', y: '2004', heat: 727914},

        {x: 'Illinois', y: '2005', heat: 1150659},

        {x: 'Illinois', y: '2006', heat: 1134085},

        {x: 'Massachusetts', y: '2004', heat: 238819},

        {x: 'Massachusetts', y: '2005', heat: 157719},

        {x: 'Massachusetts', y: '2006', heat: 887169},

        {x: 'New York', y: '2004', heat: 1667969},

        {x: 'New York', y: '2005', heat: 2763503},

        {x: 'New York', y: '2006', heat: 3151022},

        {x: 'Texas', y: '2004', heat: 219967},

        {x: 'Texas', y: '2005', heat: 3732889},

        {x: 'Texas', y: '2006', heat: 4185098}

    ]

}