Google Chart API：地理图表边界颜色

Question

I am using a GEO chart from the google API. I needed to know if the colour of the country boundaries can be changed or not?, which might help me distinguish the countries better depending on the fill colour i selected for the graph.

Answer 1

there are no config options for changing the border color,
but you can change manually, on the chart's 'ready' event.

each country will be drawn with a <path> element.
each <path> element will have a stroke attribute,
which is the border color.

var countries = container.getElementsByTagName('path');
Array.prototype.forEach.call(countries, function(path) {
  path.setAttribute('stroke', 'red');
});

see following working snippet...

 google.charts.load('current', { packages: ['geochart'], mapsApiKey: 'AIzaSyD-9tSrke72PouQMnMX-a7eZSW0jkFMBWY' }).then(function () { var data = google.visualization.arrayToDataTable([ ['Country', 'Popularity'], ['Germany', 200], ['United States', 300], ['Brazil', 400], ['Canada', 500], ['France', 600], ['RU', 700] ]); var container = document.getElementById('chart_div'); var chart = new google.visualization.GeoChart(container); google.visualization.events.addListener(chart, 'ready', function () { var countries = container.getElementsByTagName('path'); Array.prototype.forEach.call(countries, function(path) { path.setAttribute('stroke', 'red'); }); }); chart.draw(data, { legend: 'none' }); });

 <script src="https://www.gstatic.com/charts/loader.js"></script> <div id="chart_div"></div>