SVG Support

[Aymkdn]

For people who would like to add svg support, you need to add it in lower case, as well as path, to the white list.

A better solution is to change makeSanitizedCopy to get an upper case version of the tag name, and in that case we can use SVG and PATH:

function makeSanitizedCopy(node) {
  let newNode, nodeTagName = (node.tagName||"").toUpperCase();

  if (node.nodeType == Node.TEXT_NODE) {
    newNode = node.cloneNode(true);
  } else if (node.nodeType == Node.ELEMENT_NODE && (tagWhitelist_[nodeTagName] || contentTagWhiteList_[nodeTagName])) {
    //remove useless empty spans (lots of those when pasting from MS Outlook)
    if ((nodeTagName == "SPAN" || nodeTagName == "B" || nodeTagName == "I" || nodeTagName == "U")
      && node.innerHTML.trim() == "") {
      return document.createDocumentFragment();
    }

    if (contentTagWhiteList_[nodeTagName])
      newNode = iframedoc.createElement('DIV'); //convert to DIV
    else
      newNode = iframedoc.createElement(nodeTagName);

    for (let i = 0; i < node.attributes.length; i++) {
      let attr = node.attributes[i];
      if (attributeWhitelist_[attr.name]) {
        if (attr.name == "style") {
          for (let s = 0; s < node.style.length; s++) {
            let styleName = node.style[s];
            if (cssWhitelist_[styleName])
              newNode.style.setProperty(styleName, node.style.getPropertyValue(styleName));
          }
        }
        else {
          if (uriAttributes_[attr.name]) { //if this is a "uri" attribute, that can have "javascript:" or something
            if (attr.value.indexOf(":") > -1 && !startsWithAny(attr.value, schemaWhiteList_))
              continue;
          }
          newNode.setAttribute(attr.name, attr.value);
        }
      }
    }
    for (let i = 0; i < node.childNodes.length; i++) {
      let subCopy = makeSanitizedCopy(node.childNodes[i]);
      newNode.appendChild(subCopy, false);
    }
  } else {
    newNode = document.createDocumentFragment();
  }
  return newNode;
}

Don't forget to also add the attributes (like xmlns, viewbox, d, fill, …)