如何使用HTML2Canvas捕获带有oveflow集合的SVG？

<script src="html2canvas.js"></script>

<svg id="mySvg" width="500" height="500" style="overflow: visible;">
  <!-- SVG内容 -->
</svg>

html2canvas(document.getElementById("mySvg")).then(function(canvas) {
  // 处理Canvas对象
});

html2canvas(document.getElementById("mySvg")).then(function(canvas) {
  // 将Canvas插入到页面中
  document.body.appendChild(canvas);

  // 保存为图片文件
  var image = canvas.toDataURL("image/png").replace("image/png", "image/octet-stream");
  window.location.href = image;
});