react app

react-app/node_modules/react/lib/createNodesFromMarkup.js

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+/**
+ * Copyright 2013-2015, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ * @providesModule createNodesFromMarkup
+ * @typechecks
+ */
+
+/*jslint evil: true, sub: true */
+
+var ExecutionEnvironment = require("./ExecutionEnvironment");
+
+var createArrayFromMixed = require("./createArrayFromMixed");
+var getMarkupWrap = require("./getMarkupWrap");
+var invariant = require("./invariant");
+
+/**
+ * Dummy container used to render all markup.
+ */
+var dummyNode =
+  ExecutionEnvironment.canUseDOM ? document.createElement('div') : null;
+
+/**
+ * Pattern used by `getNodeName`.
+ */
+var nodeNamePattern = /^\s*<(\w+)/;
+
+/**
+ * Extracts the `nodeName` of the first element in a string of markup.
+ *
+ * @param {string} markup String of markup.
+ * @return {?string} Node name of the supplied markup.
+ */
+function getNodeName(markup) {
+  var nodeNameMatch = markup.match(nodeNamePattern);
+  return nodeNameMatch && nodeNameMatch[1].toLowerCase();
+}
+
+/**
+ * Creates an array containing the nodes rendered from the supplied markup. The
+ * optionally supplied `handleScript` function will be invoked once for each
+ * <script> element that is rendered. If no `handleScript` function is supplied,
+ * an exception is thrown if any <script> elements are rendered.
+ *
+ * @param {string} markup A string of valid HTML markup.
+ * @param {?function} handleScript Invoked once for each rendered <script>.
+ * @return {array<DOMElement|DOMTextNode>} An array of rendered nodes.
+ */
+function createNodesFromMarkup(markup, handleScript) {
+  var node = dummyNode;
+  ("production" !== process.env.NODE_ENV ? invariant(!!dummyNode, 'createNodesFromMarkup dummy not initialized') : invariant(!!dummyNode));
+  var nodeName = getNodeName(markup);
+
+  var wrap = nodeName && getMarkupWrap(nodeName);
+  if (wrap) {
+    node.innerHTML = wrap[1] + markup + wrap[2];
+
+    var wrapDepth = wrap[0];
+    while (wrapDepth--) {
+      node = node.lastChild;
+    }
+  } else {
+    node.innerHTML = markup;
+  }
+
+  var scripts = node.getElementsByTagName('script');
+  if (scripts.length) {
+    ("production" !== process.env.NODE_ENV ? invariant(
+      handleScript,
+      'createNodesFromMarkup(...): Unexpected <script> element rendered.'
+    ) : invariant(handleScript));
+    createArrayFromMixed(scripts).forEach(handleScript);
+  }
+
+  var nodes = createArrayFromMixed(node.childNodes);
+  while (node.lastChild) {
+    node.removeChild(node.lastChild);
+  }
+  return nodes;
+}
+
+module.exports = createNodesFromMarkup;