Tree map with levels

by Vignesh Gopalakrishnan

HTML

<script src="https://code.highcharts.com/highcharts.js"></script>
<script src="https://code.highcharts.com/modules/treemap.js"></script>
<script src="https://code.highcharts.com/modules/exporting.js"></script>
<script src="https://code.highcharts.com/modules/accessibility.js"></script>
<figure class="highcharts-figure">
<div id="container"></div>
<p class="highcharts-description">
This chart shows a tree map with a hierarchy, where the
groups are labelled with a different text style from the
child nodes, and the nodes are grouped together by color.
</p>
</figure>

CSS

.highcharts-figure,
.highcharts-data-table table {
    min-width: 320px;
    max-width: 600px;
    margin: 1em auto;
}

.highcharts-data-table table {
    font-family: Verdana, sans-serif;
    border-collapse: collapse;
    border: 1px solid #ebebeb;
    margin: 10px auto;
    text-align: center;
    width: 100%;
    max-width: 500px;
}

.highcharts-data-table caption {
    padding: 1em 0;
    font-size: 1.2em;
    color: #555;
}

.highcharts-data-table th {
    font-weight: 600;
    padding: 0.5em;
}

.highcharts-data-table td,
.highcharts-data-table th,
.highcharts-data-table caption {
    padding: 0.5em;
}

.highcharts-data-table thead tr,
.highcharts-data-table tr:nth-child(even) {
    background: #f8f8f8;
}

.highcharts-data-table tr:hover {
    background: #f1f7ff;
}

JavaScript

Highcharts.chart('container', {
    series: [{
        type: 'treemap',
        layoutAlgorithm: 'stripes',
        alternateStartingDirection: true,
        borderColor: '#fff',
        borderRadius: 6,
        borderWidth: 2,
        dataLabels: {
            style: {
                textOutline: 'none'
            }
        },
        levels: [{
            level: 1,
            layoutAlgorithm: 'sliceAndDice',
            dataLabels: {
                enabled: true,
                align: 'left',
                verticalAlign: 'top',
                style: {
                    fontSize: '15px',
                    fontWeight: 'bold'
                }
            }
        }],
        data: [{
            id: 'A',
            name: 'Revenue',
            color: '#50FFB1'
        }, {
            id: 'B',
            name: 'Cost',
            color: '#F5FBEF'
        }, {
            name: 'Revenue from solar electricity sales',
            parent: 'A',
            value: 20.37
        }, {
            name: 'Revenue from export',
            parent: 'A',
            value: 1.40
        }, {
            name: 'Maintenance costs',
            parent: 'B',
            value: 2.23
        }, {
            name: 'Export metering',
            parent: 'B',
            value: 0.96
        }]
    }],
    title: {
        text: 'Norwegian regions and counties by area',
        align: 'left'
    },
    subtitle: {
        text:
            'Source: <a href="https://snl.no/Norge" target="_blank">SNL</a>',
        align: 'left'
    },
    tooltip: {
        useHTML: true,
        pointFormat:
            'The area of <b>{point.name}</b> is <b>{point.value} km<sup>2</sup></b>'
    }
});