如何将SVG元素和Div放入图像中，以便用户可以下载

最有前途的方法是将DOM的一部分呈现到画布上。该画布可以显示为图像并由用户下载。或者，您可以将画布保存为blob，但并非所有浏览器都支持，因此可以使用其他库。更多信息：

https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API/Drawing_DOM_objects_into_a_canvas

https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/toBlob

您可以将父div保存到画布中，然后使用js 对其进行映像和下载

<div id = "widget" class="objects ui-droppable ui-sortable">
    <div class="b_s _jsPlumb_endpoint_anchor _jsPlumb_connected" id="start_block">START</div> 
    <div class="b_1 block ui-draggable ui-draggable-handle _jsPlumb_endpoint_anchor _jsPlumb_connected" id="n_block4" title="test"><span>test</span></div>
    <div class="b_s _jsPlumb_endpoint_anchor _jsPlumb_connected" id="end_block">STOP</div><div class="_jsPlumb_endpoint _jsPlumb_endpoint_anchor jsplumb-draggable jsplumb-droppable" style="display: block; width: 10px; height: 0px; position: absolute; left: 530px; top: 52px; background: transparent;"></div>
    <div class="_jsPlumb_endpoint _jsPlumb_endpoint_anchor jsplumb-draggable jsplumb-droppable" style="display: block; width: 10px; height: 0px; position: absolute; left: 529.5px; top: 82px; background: transparent;"></div>
    <svg style="position:absolute;left:519.5px;top:48px" width="20" height="38" pointer-events="none" position="absolute" version="1.1" xmlns="http://www.w3.org/1999/xhtml" class="_jsPlumb_connector"><path d="M 0.5 -1 L 0.5 31 M 1.5 30 L -0.75 30 M 0.25 31 L 0.25 -1 M 1.25 0 L -1 0 M 0 0 L 0 30 " transform="translate(9.999999999999998,4)" pointer-events="visibleStroke" version="1.1" xmlns="http://www.w3.org/1999/xhtml" fill="none" stroke="rgb(7,152,216)" style="" stroke-width="2"></path><path pointer-events="all" version="1.1" xmlns="http://www.w3.org/1999/xhtml" d="M4.684274006738627e-16,32.650000000000006 L10.000000000000002,7.650000000000007 L1.4221210955098638e-15,17.075000000000006 L-9.999999999999998,7.650000000000005 L4.684274006738627e-16,32.650000000000006" class="" stroke="rgb(7,152,216)" fill="rgb(7,152,216)" transform="translate(9.999999999999998,4)"></path></svg>
    <div class="_jsPlumb_endpoint _jsPlumb_endpoint_anchor jsplumb-draggable jsplumb-droppable" style="display: block; width: 10px; height: 0px; position: absolute; left: 529.5px; top: 126px; background: transparent;"></div>
    <div class="_jsPlumb_endpoint _jsPlumb_endpoint_anchor jsplumb-draggable jsplumb-droppable" style="display: block; width: 10px; height: 0px; position: absolute; left: 530px; top: 156px; background: transparent;"></div>
    <svg style="position:absolute;left:520px;top:122px" width="20" height="38" pointer-events="none" position="absolute" version="1.1" xmlns="http://www.w3.org/1999/xhtml" class="_jsPlumb_connector"><path d="M 0 -1 L 0 31 M -1 30 L 1.25 30 M 0.25 31 L 0.25 -1 M -0.75 0 L 1.5 0 M 0.5 0 L 0.5 30 " transform="translate(9.499999999999998,4)" pointer-events="visibleStroke" version="1.1" xmlns="http://www.w3.org/1999/xhtml" fill="none" stroke="rgb(7,152,216)" style="" stroke-width="2"></path><path pointer-events="all" version="1.1" xmlns="http://www.w3.org/1999/xhtml" d="M0.5000000000000004,32.650000000000006 L10.500000000000002,7.650000000000007 L0.5000000000000014,17.075000000000006 L-9.499999999999998,7.650000000000005 L0.5000000000000004,32.650000000000006" class="" stroke="rgb(7,152,216)" fill="rgb(7,152,216)" transform="translate(9.499999999999998,4)"></path></svg>
</div>
<br/>
<input type="button" id="btnSave" value="Save PNG"/>
<div id="img-out"></div>

js:

$(function() { 
$("#btnSave").click(function() { 
    html2canvas($("#widget"), {
        onrendered: function(canvas) {
            theCanvas = canvas;
            document.body.appendChild(canvas);
            // Convert and download as image 
            Canvas2Image.saveAsPNG(canvas); 
            $("#img-out").append(canvas);

          }
       });
    });
 }); 

它依赖于jquery、html2canvas.js、base64.js、canvas2image.js

我想这对你有用。