mirror of
https://github.com/facebook/react.git
synced 2025-11-01 09:12:30 +00:00
Paul O’Shannessy
8a47813baa
grep -rl 'Copyright 2013 Facebook' static_upstream | xargs perl -pi -w -e s/Copyright 2013 Facebook/Copyright 2013-2014 Facebook/g;' Not going to check in a script to do this since it will just change every year. Closes #1006
68 lines
1.8 KiB
JavaScript
68 lines
1.8 KiB
JavaScript
/**
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* Copyright 2013-2014 Facebook, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* @providesModule ReactContext
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*/
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"use strict";
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var merge = require('merge');
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/**
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* Keeps track of the current context.
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*
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* The context is automatically passed down the component ownership hierarchy
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* and is accessible via `this.context` on ReactCompositeComponents.
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*/
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var ReactContext = {
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/**
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* @internal
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* @type {object}
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*/
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current: {},
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/**
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* Temporarily extends the current context while executing scopedCallback.
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*
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* A typical use case might look like
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*
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* render: function() {
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* var children = ReactContext.withContext({foo: 'foo'} () => (
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*
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* ));
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* return <div>{children}</div>;
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* }
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*
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* @param {object} newContext New context to merge into the existing context
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* @param {function} scopedCallback Callback to run with the new context
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* @return {ReactComponent|array<ReactComponent>}
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*/
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withContext: function(newContext, scopedCallback) {
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var result;
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var previousContext = ReactContext.current;
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ReactContext.current = merge(previousContext, newContext);
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try {
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result = scopedCallback();
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} finally {
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ReactContext.current = previousContext;
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}
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return result;
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}
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};
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module.exports = ReactContext;
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