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 chart = anychart.line([

        {x: 'January', value: 1},

        {x: 'February', value: 2},

        {x: 'March', value: 1.3},

        {x: 'April', value: 2.9}

    ]);

    chart.contextMenu(false);

​

    var customContextMenu = anychart.ui.contextMenu();

    customContextMenu.addClassName('custom-menu');

    customContextMenu.itemsProvider(function () {

        return [

            {

                text: 'Custom Menu Item',

                href: 'https://api.anychart.com'

            }

        ];

    });

    customContextMenu.attach(chart);

​

    // Remove class name.

    customContextMenu.removeClassName('custom-menu');

​

    chart.title('Remove CSS class name');

    chart.container('container');

    chart.draw();

});