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react app
This commit is contained in:
Mario Romano
183
react-app/node_modules/react/lib/Danger.js
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vendored
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183
react-app/node_modules/react/lib/Danger.js
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/**
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* Copyright 2013-2015, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* @providesModule Danger
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* @typechecks static-only
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*/
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/*jslint evil: true, sub: true */
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'use strict';
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var ExecutionEnvironment = require("./ExecutionEnvironment");
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var createNodesFromMarkup = require("./createNodesFromMarkup");
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var emptyFunction = require("./emptyFunction");
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var getMarkupWrap = require("./getMarkupWrap");
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var invariant = require("./invariant");
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var OPEN_TAG_NAME_EXP = /^(<[^ \/>]+)/;
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var RESULT_INDEX_ATTR = 'data-danger-index';
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/**
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* Extracts the `nodeName` from a string of markup.
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*
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* NOTE: Extracting the `nodeName` does not require a regular expression match
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* because we make assumptions about React-generated markup (i.e. there are no
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* spaces surrounding the opening tag and there is at least one attribute).
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*
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* @param {string} markup String of markup.
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* @return {string} Node name of the supplied markup.
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* @see http://jsperf.com/extract-nodename
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*/
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function getNodeName(markup) {
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return markup.substring(1, markup.indexOf(' '));
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}
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var Danger = {
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/**
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* Renders markup into an array of nodes. The markup is expected to render
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* into a list of root nodes. Also, the length of `resultList` and
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* `markupList` should be the same.
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*
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* @param {array<string>} markupList List of markup strings to render.
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* @return {array<DOMElement>} List of rendered nodes.
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* @internal
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*/
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dangerouslyRenderMarkup: function(markupList) {
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("production" !== process.env.NODE_ENV ? invariant(
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ExecutionEnvironment.canUseDOM,
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'dangerouslyRenderMarkup(...): Cannot render markup in a worker ' +
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'thread. Make sure `window` and `document` are available globally ' +
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'before requiring React when unit testing or use ' +
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'React.renderToString for server rendering.'
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) : invariant(ExecutionEnvironment.canUseDOM));
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var nodeName;
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var markupByNodeName = {};
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// Group markup by `nodeName` if a wrap is necessary, else by '*'.
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for (var i = 0; i < markupList.length; i++) {
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("production" !== process.env.NODE_ENV ? invariant(
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markupList[i],
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'dangerouslyRenderMarkup(...): Missing markup.'
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) : invariant(markupList[i]));
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nodeName = getNodeName(markupList[i]);
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nodeName = getMarkupWrap(nodeName) ? nodeName : '*';
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markupByNodeName[nodeName] = markupByNodeName[nodeName] || [];
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markupByNodeName[nodeName][i] = markupList[i];
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}
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var resultList = [];
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var resultListAssignmentCount = 0;
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for (nodeName in markupByNodeName) {
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if (!markupByNodeName.hasOwnProperty(nodeName)) {
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continue;
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}
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var markupListByNodeName = markupByNodeName[nodeName];
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// This for-in loop skips the holes of the sparse array. The order of
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// iteration should follow the order of assignment, which happens to match
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// numerical index order, but we don't rely on that.
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var resultIndex;
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for (resultIndex in markupListByNodeName) {
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if (markupListByNodeName.hasOwnProperty(resultIndex)) {
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var markup = markupListByNodeName[resultIndex];
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// Push the requested markup with an additional RESULT_INDEX_ATTR
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// attribute. If the markup does not start with a < character, it
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// will be discarded below (with an appropriate console.error).
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markupListByNodeName[resultIndex] = markup.replace(
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OPEN_TAG_NAME_EXP,
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// This index will be parsed back out below.
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'$1 ' + RESULT_INDEX_ATTR + '="' + resultIndex + '" '
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);
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}
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}
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// Render each group of markup with similar wrapping `nodeName`.
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var renderNodes = createNodesFromMarkup(
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markupListByNodeName.join(''),
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emptyFunction // Do nothing special with <script> tags.
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);
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for (var j = 0; j < renderNodes.length; ++j) {
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var renderNode = renderNodes[j];
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if (renderNode.hasAttribute &&
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renderNode.hasAttribute(RESULT_INDEX_ATTR)) {
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resultIndex = +renderNode.getAttribute(RESULT_INDEX_ATTR);
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renderNode.removeAttribute(RESULT_INDEX_ATTR);
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("production" !== process.env.NODE_ENV ? invariant(
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!resultList.hasOwnProperty(resultIndex),
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'Danger: Assigning to an already-occupied result index.'
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) : invariant(!resultList.hasOwnProperty(resultIndex)));
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resultList[resultIndex] = renderNode;
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// This should match resultList.length and markupList.length when
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// we're done.
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resultListAssignmentCount += 1;
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} else if ("production" !== process.env.NODE_ENV) {
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console.error(
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'Danger: Discarding unexpected node:',
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renderNode
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);
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}
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}
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}
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// Although resultList was populated out of order, it should now be a dense
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// array.
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("production" !== process.env.NODE_ENV ? invariant(
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resultListAssignmentCount === resultList.length,
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'Danger: Did not assign to every index of resultList.'
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) : invariant(resultListAssignmentCount === resultList.length));
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("production" !== process.env.NODE_ENV ? invariant(
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resultList.length === markupList.length,
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'Danger: Expected markup to render %s nodes, but rendered %s.',
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markupList.length,
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resultList.length
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) : invariant(resultList.length === markupList.length));
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return resultList;
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},
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/**
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* Replaces a node with a string of markup at its current position within its
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* parent. The markup must render into a single root node.
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*
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* @param {DOMElement} oldChild Child node to replace.
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* @param {string} markup Markup to render in place of the child node.
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* @internal
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*/
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dangerouslyReplaceNodeWithMarkup: function(oldChild, markup) {
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("production" !== process.env.NODE_ENV ? invariant(
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ExecutionEnvironment.canUseDOM,
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'dangerouslyReplaceNodeWithMarkup(...): Cannot render markup in a ' +
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'worker thread. Make sure `window` and `document` are available ' +
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'globally before requiring React when unit testing or use ' +
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'React.renderToString for server rendering.'
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) : invariant(ExecutionEnvironment.canUseDOM));
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("production" !== process.env.NODE_ENV ? invariant(markup, 'dangerouslyReplaceNodeWithMarkup(...): Missing markup.') : invariant(markup));
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("production" !== process.env.NODE_ENV ? invariant(
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oldChild.tagName.toLowerCase() !== 'html',
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'dangerouslyReplaceNodeWithMarkup(...): Cannot replace markup of the ' +
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'<html> node. This is because browser quirks make this unreliable ' +
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'and/or slow. If you want to render to the root you must use ' +
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'server rendering. See React.renderToString().'
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) : invariant(oldChild.tagName.toLowerCase() !== 'html'));
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var newChild = createNodesFromMarkup(markup, emptyFunction)[0];
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oldChild.parentNode.replaceChild(newChild, oldChild);
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}
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};
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module.exports = Danger;
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