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Diffstat (limited to 'node_modules/fbjs/lib/createNodesFromMarkup.js')
-rw-r--r-- | node_modules/fbjs/lib/createNodesFromMarkup.js | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/node_modules/fbjs/lib/createNodesFromMarkup.js b/node_modules/fbjs/lib/createNodesFromMarkup.js new file mode 100644 index 000000000..6d226d929 --- /dev/null +++ b/node_modules/fbjs/lib/createNodesFromMarkup.js @@ -0,0 +1,83 @@ +'use strict'; + +/** + * Copyright (c) 2013-present, 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. + * + * @typechecks + */ + +/*eslint-disable fb-www/unsafe-html*/ + +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; + !!!dummyNode ? process.env.NODE_ENV !== 'production' ? invariant(false, 'createNodesFromMarkup dummy not initialized') : invariant(false) : void 0; + 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) { + !handleScript ? process.env.NODE_ENV !== 'production' ? invariant(false, 'createNodesFromMarkup(...): Unexpected <script> element rendered.') : invariant(false) : void 0; + createArrayFromMixed(scripts).forEach(handleScript); + } + + var nodes = Array.from(node.childNodes); + while (node.lastChild) { + node.removeChild(node.lastChild); + } + return nodes; +} + +module.exports = createNodesFromMarkup;
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