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46 lines
1.3 KiB
46 lines
1.3 KiB
/** |
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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 ReactMarkupChecksum |
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*/ |
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'use strict'; |
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var adler32 = require("./adler32"); |
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var ReactMarkupChecksum = { |
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CHECKSUM_ATTR_NAME: 'data-react-checksum', |
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/** |
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* @param {string} markup Markup string |
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* @return {string} Markup string with checksum attribute attached |
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*/ |
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addChecksumToMarkup: function(markup) { |
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var checksum = adler32(markup); |
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return markup.replace( |
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'>', |
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' ' + ReactMarkupChecksum.CHECKSUM_ATTR_NAME + '="' + checksum + '">' |
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); |
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}, |
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/** |
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* @param {string} markup to use |
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* @param {DOMElement} element root React element |
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* @returns {boolean} whether or not the markup is the same |
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*/ |
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canReuseMarkup: function(markup, element) { |
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var existingChecksum = element.getAttribute( |
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ReactMarkupChecksum.CHECKSUM_ATTR_NAME |
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); |
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existingChecksum = existingChecksum && parseInt(existingChecksum, 10); |
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var markupChecksum = adler32(markup); |
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return markupChecksum === existingChecksum; |
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} |
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}; |
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module.exports = ReactMarkupChecksum;
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