html, body, #container {

    width: 100%;

    height: 100%;

    margin: 0;

    padding: 0;

}

anychart.onDocumentReady(function () {

    var chart = anychart.line();

​

    var series1 = chart.line([

        {x: 'Cycling', value: 10},

        {x: 'Swimming', value: 32},

        {x: 'Run', value: 18}

    ]);

    series1.markers(true);

​

    var series2 = chart.line([

        {x: 'Cycling', value: 15},

        {x: 'Swimming', value: 9},

        {x: 'Run', value: 29}

    ]);

​

    chart.legend(true);

​

    var item = series1.legendItem();

​

    // Set icon stroke.

    item.iconStroke(function () {

        return anychart.color.setThickness(anychart.color.darken(this.sourceColor), 2);

    });

​

    chart.title('Set icon stroke parameter as a function');

    chart.container('container');

    chart.draw();

});