code: function convertSvgToHtml (d3svg, title) {
          if (!d3svg) {
              return;
          }
  
          d3svg.attr('version', 1.1)
              .attr('xmlns', 'http://www.w3.org/2000/svg');
          let serializer = serializeWithStyles.initializeSerializer();
          let html = serializer(d3svg.node());
  
          html = formatHtmlByBrowser(html);
          html = prependTitle.call(this, html, title, parseInt(d3svg.attr('width'), 10));
          html = addBackground(html);
  
          return html;
      }
docs: Takes the D3 SVG element, adds proper SVG tags, adds inline styles
  from stylesheets, adds white background and returns string
  @param  {SVGElement} d3svg   TYPE d3 svg element
  @return {String}             String of passed d3