从DOM或Object元素下载svg文件

var svgElement = document.getElementById('svgElement'); // 替换为实际的SVG元素ID
var svgData = new XMLSerializer().serializeToString(svgElement);
var blob = new Blob([svgData], { type: 'image/svg+xml' });
var url = URL.createObjectURL(blob);

var downloadLink = document.createElement('a');
downloadLink.href = url;
downloadLink.download = 'image.svg'; // 设置下载的文件名
downloadLink.style.display = 'none'; // 隐藏下载按钮
document.body.appendChild(downloadLink);

downloadLink.click();

function downloadSVG() {
  var svgElement = document.getElementById('svgElement'); // 替换为实际的SVG元素ID
  var svgData = new XMLSerializer().serializeToString(svgElement);
  var blob = new Blob([svgData], { type: 'image/svg+xml' });
  var url = URL.createObjectURL(blob);

  var downloadLink = document.createElement('a');
  downloadLink.href = url;
  downloadLink.download = 'image.svg'; // 设置下载的文件名
  downloadLink.style.display = 'none'; // 隐藏下载按钮
  document.body.appendChild(downloadLink);

  downloadLink.click();
}