FizzTestUtils.js — react Source File

Source Code

/**
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @flow
 */
'use strict';

async function insertNodesAndExecuteScripts(
  source: Document | Element,
  target: Node,
  CSPnonce: string | null,
) {
  const ownerDocument = target.ownerDocument || target;

  // We need to remove the script content for any scripts that would not run based on CSP
  // We restore the script content after moving the nodes into the target
  const badNonceScriptNodes: Map<Element, string> = new Map();
  if (CSPnonce) {
    const scripts = source.querySelectorAll('script');
    for (let i = 0; i < scripts.length; i++) {
      const script = scripts[i];
      if (
        !script.hasAttribute('src') &&
        script.getAttribute('nonce') !== CSPnonce
      ) {
        badNonceScriptNodes.set(script, script.textContent);
        script.textContent = '';
      }
    }
  }
  let lastChild = null;
  while (source.firstChild) {
    const node = source.firstChild;
    if (lastChild === node) {
      throw new Error('Infinite loop.');
    }
    lastChild = node;

    if (node.nodeType === 1) {
      const element: Element = (node: any);
      if (
        // $FlowFixMe[prop-missing]
        element.dataset != null &&
        (element.dataset.rxi != null ||
          element.dataset.rri != null ||
          element.dataset.rci != null ||
          element.dataset.rsi != null)
      ) {
        // Fizz external runtime instructions are expected to be in the body.
        // When we have renderIntoContainer and renderDocument this will be
        // more enforceable. At the moment you can misconfigure your stream and end up
        // with instructions that are deep in the document
        (ownerDocument.body: any).appendChild(element);
      } else {
        target.appendChild(element);

        if (element.nodeName === 'SCRIPT') {
// ... (136 more lines)