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Adding Groups to SVG
<!DOCTYPE html> <head> <meta charset="utf-8"> <script src="https://d3js.org/d3.v4.min.js"></script> <style> body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; } </style> </head> <body> <script> var svg = d3.select("body").append("svg") .attr("width", 960) .attr("height", 500) d3.json("data.json", function(error, json) { var group = d3.select("svg").selectAll("g") .data(json) .enter() .append("g") //here we will position the group using transformation matrices so that the rectangles and text get positioned together. .attr ("transform" , function (d) {if (d.orientation === 'forward'){return "translate(" + d.start + ",100)";} else {return "translate(" + d.start + ",175)"; }}); group.append("rect") .attr("height", 50) .attr("width", function (d) {return d.stop - d.start;}) .attr("fill", function(d) {if (d.orientation == "forward") {return "green"; } else if (d.orientation == "reverse") {return "red";} }) .style("stroke", "black") .style("stroke-width", 3) group.append("text") .attr("x", function (d) {return (d.stop - d.start)/2 }) .attr("y", 25) .text(function (d) {return d.name}) .attr("text-anchor", "middle") .attr("alignment-baseline", "central");}); </script> </body>
https://d3js.org/d3.v4.min.js