html, body, #container {

    width: 100%;

    height: 100%;

    margin: 0;

    padding: 0;

}

anychart.onDocumentReady(function () {

    var chart = anychart.area();

​

    var series = chart.stepArea([

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

        {x: 'Swimming', value: 12},

        {x: 'Run', value: 18},

        {x: 'Hiking', value: 11},

        {x: 'Alpinism', value: 9}

    ]);

​

    var state = series.normal();

​

    // Set stroke.

    state.stroke(function () {

        return anychart.color.setThickness(this.sourceColor, 3);

    });

​

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

    chart.container('container');

    chart.draw();

});