53 lines
1.7 KiB
JavaScript
53 lines
1.7 KiB
JavaScript
/**
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* Copyright 2013 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 ReactDOMNodeCache
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*/
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"use strict";
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var ReactMount = require('ReactMount');
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var nodeCache = {};
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/**
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* DOM node cache only intended for use by React. Placed into a shared module so
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* that both read and write utilities may benefit from a shared cache.
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*/
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var ReactDOMNodeCache = {
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/**
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* Releases fast id lookups (node/style cache). This implementation is
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* aggressive with purging because the bookkeeping associated with doing fine
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* grained deleted from the cache may outweight the benefits of the cache. The
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* heuristic that should be used to purge is 'any time anything is deleted'.
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* Typically this means that a large amount of content is being replaced and
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* several elements would need purging regardless. It's also a time when an
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* application is likely not in the middle of a "smooth operation" (such as
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* animating/scrolling).
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*/
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purgeEntireCache: function() {
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nodeCache = {};
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return nodeCache;
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},
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getCachedNodeByID: function(id) {
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return nodeCache[id] ||
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(nodeCache[id] =
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document.getElementById(id) ||
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ReactMount.findReactRenderedDOMNodeSlow(id));
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}
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};
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module.exports = ReactDOMNodeCache;
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