xxxxxxxxxx<html><head> <script type="text/javascript" src="https://cdn.jsdelivr.net/npm/d3@2.10.3/d3.v2.js"></script></head><body> <div class="viz"></div> <script type="text/javascript"> var sampleSVG = d3.select(".viz") .append("svg") .attr("width", 100) .attr("height", 100); sampleSVG.append("circle") .style("stroke", "gray") .style("fill", "red") .attr("r", 40) .attr("cx", 50) .attr("cy", 50); </script></body></html> Modified http://mbostock.github.com/d3/d3.js to a secure url
https://mbostock.github.com/d3/d3.js