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47 lines
1.3 KiB
47 lines
1.3 KiB
10 years ago
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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 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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