Test Screenshot Code

<!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>

function screenshotPage() {
        urlsToAbsolute(document.images);
        urlsToAbsolute(document.querySelectorAll("link[rel='stylesheet']"));
        var screenshot = document.documentElement.cloneNode(true);
        var b = document.createElement('base');
        b.href = document.location.protocol + '//' + location.host;
        var head = screenshot.querySelector('head');
        head.insertBefore(b, head.firstChild);
        screenshot.style.pointerEvents = 'none';
        screenshot.style.overflow = 'hidden';
        screenshot.style.webkitUserSelect = 'none';
        screenshot.style.mozUserSelect = 'none';
        screenshot.style.msUserSelect = 'none';
        screenshot.style.oUserSelect = 'none';
        screenshot.style.userSelect = 'none';
        screenshot.dataset.scrollX = window.scrollX;
        screenshot.dataset.scrollY = window.scrollY;
        var script = document.createElement('script');
        script.textContent = '(' + addOnPageLoad_.toString() + ')();';
        screenshot.querySelector('body').appendChild(script);
        var blob = new Blob([screenshot.outerHTML], {
            type: 'text/html'
        });
        return blob;
    }

function addOnPageLoad_() {
        window.addEventListener('DOMContentLoaded', function (e) {
            var scrollX = document.documentElement.dataset.scrollX || 0;
            var scrollY = document.documentElement.dataset.scrollY || 0;
            window.scrollTo(scrollX, scrollY);
        });
    }

function generate() {
        window.URL = window.URL || window.webkitURL;
	      var blob = window.URL.createObjectURL(screenshotPage())
        console.log(blob)
        
        const a = document.createElement('a');
        a.setAttribute('download', "some image name");
        a.setAttribute('href', blob);
        a.click();
        
     //   window.open(window.URL.createObjectURL(screenshotPage()));
    }
    exports.screenshotPage = screenshotPage;
    exports.generate = generate;
})(window);

// Feel free to change or delete any of the code you see in this editor!
    var svg = d3.select("body").append("svg")
      .attr("width", 960)
      .attr("height", 500)

svg.append("text") 
      .text("Edit the code below to change me!")
      .attr("y", 200)
      .attr("x", 120)
      .attr("font-size", 36)
      .attr("font-family", "monospace")
    
    
    svg.append("circle")
      .attr("cy", 200)
      .attr("cx", 120)
    	.attr("r",40)
	    .style("fill","red")
    	.transition()
    	.attr("cx", 220)
    .on("end",function(){
      	generate()
      
    })

</script>
</body>

https://d3js.org/d3.v4.min.js