D3.js Download Graph As Svg Image

I have been lookig around for a way to download the generated svg from d3.js and I either end up with phantom.js which seems kinda overkill (or at least intimidating given the 'sim

Solution 1:

Ok , I have settled with just allowing the specification of a button (with downloadID) and have added this in the code after creating the svg.

            if (p.graph.svg.downloadID != undefined){
                var serializer = new XMLSerializer();
                var xmlString = serializer.serializeToString(d3.select('svg').node());
                var imgData = 'data:image/svg+xml;base64,' + btoa(xmlString);

                function writeDownloadLink(){
                    var html = d3.select(elementid).select("svg")
                            .attr("title", "svg_title")
                            .attr("version", 1.1)
                            .attr("xmlns", "http://www.w3.org/2000/svg")
                            .node().parentNode.innerHTML;  

                    d3.select(this)
                            .attr("href-lang", "image/svg+xml")
                            .attr("href", "data:image/svg+xml;base64,\n" + btoa(unescape(encodeURIComponent(html))))
                };

                var idselector = "#"+p.graph.svg.downloadID;

                d3.select(idselector)
                        .on("mouseover", writeDownloadLink);

            } 

Not what I had in mind at first but works for me.

Solution 2:

I've modified the svg-crowbar script to be a function called downloadSVG() that can be called from within your script. The function downloads SVG(s) on the webpage. The function can be found at: https://bitbucket.org/mas29/public_resources/raw/b9bafa002053b4609bd5186010d19e959cba33d4/scripts/js/svg_download/downloadSVG.js.

Let's say you have a button that, when pushed, should download the SVG(s). Just tack on the downloadSVG() as part of the "click" function, like so:

d3.select("body").append("button")
        .attr("type","button")
        .attr("class", "downloadButton")
        .text("Download SVG")
        .on("click", function() {
            // download the svg
            downloadSVG();
        });

Solution 3:

I found this block to have the best solution.

• Markup:

  <a id="download" href="#">Download SVG</button>
  

• javasript:

  d3.select("#download").on("click", function() {
    d3.select(this)
      .attr("href", 'data:application/octet-stream;base64,' + btoa(d3.select("#line").html()))
      .attr("download", "viz.svg") 
  })