FlowChart.html

<!DOCTYPE html>
<html lang="en">

<head>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/raphael/2.3.0/raphael.min.js"></script>
    <script src="https://flowchart.js.org/flowchart-latest.js"></script>

    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>FlowChart</title>
</head>

<body>
    <button id="download">Download</button>
    <div id="canvas"></div>

    <script>
        document.getElementById("download").onclick = function(e) {
            const canvas = document.getElementById("canvas");
            if (canvas.children.length > 0) {
                const svgData = canvas.querySelector("svg").outerHTML;
                var svgBlob = new Blob([svgData], {
                    type: "image/svg+xml;charset=utf-8"
                });
                var svgUrl = URL.createObjectURL(svgBlob);
                var downloadLink = document.createElement("a");
                downloadLink.href = svgUrl;
                downloadLink.download = "flowchart.svg";
                document.body.appendChild(downloadLink);
                downloadLink.click();
                document.body.removeChild(downloadLink);
            }
        }
    </script>
</body>

</html>