Although this may seem like a minor issue, I can't find any information in the documentation. I'm currently using Google Charts treemap for monitoring a specific project. The problem I'm facing is that when all the parent level rectangles are green, the sub-boxes aren't very clear as they are divided by thin white lines. Is there a way to customize the borders of each rectangle, such as making them black or increasing the width between each rectangle?
If you want to customize the CSS for the chart, remember that it is SVG-based.
To modify the border color, use code similar to the following:
rect {
stroke: black;
stroke-width: 2;
}
Take a look at this example below:
google.charts.load('current', {
callback: function () {
var data = google.visualization.arrayToDataTable([
['Location', 'Parent', 'Market trade volume (size)', 'Market increase/decrease (color)'],
['Global', null, 0, 0],
// More data entries here...
]);
new google.visualization.TreeMap(document.getElementById('chart_div')).draw(data, {
minColor: '#f00',
midColor: '#ddd',
maxColor: '#0d0',
headerHeight: 15,
fontColor: 'black',
showScale: true
});
},
packages:['treemap']
});rect {
stroke: black;
stroke-width: 2;
}<script src="https://www.gstatic.com/charts/loader.js"></script>
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