Highcharts Dynamic CSS

by Torstein Hønsi

HTML

<script src="http://code.highcharts.com/highcharts.js"></script>
<script src="http://code.highcharts.com/modules/exporting.js"></script>

<div id="container"></div>

CSS

#container {
    min-width: 300px;
    max-width: 800px;
    height: 300px;
    margin: 1em auto;
}
path.high {
    fill: yellow;
    stroke: red;
    stroke-width: 1;
}

JavaScript

Highcharts.wrap(Highcharts.Series.prototype, 'drawPoints', function (proceed) {
    proceed.call(this);
    $.each(this.points, function () {
        if (this.cls && this.graphic) {
            this.graphic.addClass(this.cls);
        }
    });
});


$('#container').highcharts({

    xAxis: {
        categories: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 
            'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
    },

    series: [{
        data: $.map([29.9, 71.5, 106.4, 129.2, 144.0, 176.0, 135.6, 148.5, 216.4, 194.1, 95.6, 54.4], function (val) {
            return val > 100 ? {
                y: val,
                cls: 'high'
            } : {
                y: val,
                cls: 'low'
            };
        })
    }]

});