react app

react-app/node_modules/react/lib/setInnerHTML.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 setInnerHTML
+ */
+
+/* globals MSApp */
+
+'use strict';
+
+var ExecutionEnvironment = require("./ExecutionEnvironment");
+
+var WHITESPACE_TEST = /^[ \r\n\t\f]/;
+var NONVISIBLE_TEST = /<(!--|link|noscript|meta|script|style)[ \r\n\t\f\/>]/;
+
+/**
+ * Set the innerHTML property of a node, ensuring that whitespace is preserved
+ * even in IE8.
+ *
+ * @param {DOMElement} node
+ * @param {string} html
+ * @internal
+ */
+var setInnerHTML = function(node, html) {
+  node.innerHTML = html;
+};
+
+// Win8 apps: Allow all html to be inserted
+if (typeof MSApp !== 'undefined' && MSApp.execUnsafeLocalFunction) {
+  setInnerHTML = function(node, html) {
+    MSApp.execUnsafeLocalFunction(function() {
+      node.innerHTML = html;
+    });
+  };
+}
+
+if (ExecutionEnvironment.canUseDOM) {
+  // IE8: When updating a just created node with innerHTML only leading
+  // whitespace is removed. When updating an existing node with innerHTML
+  // whitespace in root TextNodes is also collapsed.
+  // @see quirksmode.org/bugreports/archives/2004/11/innerhtml_and_t.html
+
+  // Feature detection; only IE8 is known to behave improperly like this.
+  var testElement = document.createElement('div');
+  testElement.innerHTML = ' ';
+  if (testElement.innerHTML === '') {
+    setInnerHTML = function(node, html) {
+      // Magic theory: IE8 supposedly differentiates between added and updated
+      // nodes when processing innerHTML, innerHTML on updated nodes suffers
+      // from worse whitespace behavior. Re-adding a node like this triggers
+      // the initial and more favorable whitespace behavior.
+      // TODO: What to do on a detached node?
+      if (node.parentNode) {
+        node.parentNode.replaceChild(node, node);
+      }
+
+      // We also implement a workaround for non-visible tags disappearing into
+      // thin air on IE8, this only happens if there is no visible text
+      // in-front of the non-visible tags. Piggyback on the whitespace fix
+      // and simply check if any non-visible tags appear in the source.
+      if (WHITESPACE_TEST.test(html) ||
+          html[0] === '<' && NONVISIBLE_TEST.test(html)) {
+        // Recover leading whitespace by temporarily prepending any character.
+        // \uFEFF has the potential advantage of being zero-width/invisible.
+        node.innerHTML = '\uFEFF' + html;
+
+        // deleteData leaves an empty `TextNode` which offsets the index of all
+        // children. Definitely want to avoid this.
+        var textNode = node.firstChild;
+        if (textNode.data.length === 1) {
+          node.removeChild(textNode);
+        } else {
+          textNode.deleteData(0, 1);
+        }
+      } else {
+        node.innerHTML = html;
+      }
+    };
+  }
+}
+
+module.exports = setInnerHTML;