@servicenow/ui-renderer-snabbdom/module/createElementFromNode.js

Snabbdom renderer for UI Framework on Next Experience

/**
 * Copyright (c) 2020 ServiceNow, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *  
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *  
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
// TODO (webpack v5): drop the `build/package/` part of these import paths.
// Snabbdom>=1 uses the package.json#exports field that webpack v4 doesn't know
// about
//
// https://github.com/webpack/webpack/issues/9509
// https://webpack.js.org/guides/package-exports/
import { toVNode } from 'snabbdom/build/package/tovnode';
import { sign } from 'snabbdom-signature';
/**
 * Creates an element for the virtual DOM from an existing DOM node
 * @method createElementFromNode
 * @param {Node} node DOM node to convert
 * @returns {VNode} The vnode to use in the virtual DOM
 */

export default function createElementFromNode(node) {
  const vnode = sign(toVNode(node));
  fixNamespace(vnode); // fixes issue with missing namespace for svgs: https://github.com/snabbdom/snabbdom/issues/388

  return vnode;
}

const fixNamespace = (vnode, xmlns = vnode.data && vnode.data.attrs && vnode.data.attrs.xmlns) => {
  const {
    children,
    data
  } = vnode;
  if (data && !data.ns && xmlns) data.ns = xmlns;

  if (children) {
    const {
      length: childrenCount
    } = children;

    for (let i = 0; i < childrenCount; i++) fixNamespace(children[i], xmlns);
  }
};
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