<html> <head> <script type = "text/javascript" src = "https://cdn.jsdelivr.net/npm/d3@7"></script> <style> body { font-family: Arial; } </style> </head> <body> <div id = "svgcontainer"> </div> <script language = "javascript"> var width = 300; var height = 300; var svg = d3.select("#svgcontainer") .append("svg") .attr("width", width) .attr("height", height); svg.append("line") .attr("x1", 100) .attr("y1", 100) .attr("x2", 200) .attr("y2", 200) .style("stroke", "rgb(255,0,0)") .style("stroke-width", 2); </script> </body></html>