121 lines
3.4 KiB
JavaScript
121 lines
3.4 KiB
JavaScript
/**
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* Copyright 2016-present, 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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* Based on the escape-html library, which is used under the MIT License below:
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*
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* Copyright (c) 2012-2013 TJ Holowaychuk
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* Copyright (c) 2015 Andreas Lubbe
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* Copyright (c) 2015 Tiancheng "Timothy" Gu
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* 'Software'), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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'use strict';
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// code copied and modified from escape-html
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/**
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* Module variables.
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* @private
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*/
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var matchHtmlRegExp = /["'&<>]/;
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/**
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* Escape special characters in the given string of html.
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*
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* @param {string} string The string to escape for inserting into HTML
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* @return {string}
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* @public
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*/
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function escapeHtml(string) {
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var str = '' + string;
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var match = matchHtmlRegExp.exec(str);
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if (!match) {
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return str;
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}
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var escape;
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var html = '';
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var index = 0;
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var lastIndex = 0;
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for (index = match.index; index < str.length; index++) {
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switch (str.charCodeAt(index)) {
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case 34:
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// "
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escape = '"';
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break;
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case 38:
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// &
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escape = '&';
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break;
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case 39:
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// '
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escape = '''; // modified from escape-html; used to be '''
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break;
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case 60:
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// <
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escape = '<';
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break;
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case 62:
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// >
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escape = '>';
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break;
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default:
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continue;
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}
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if (lastIndex !== index) {
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html += str.substring(lastIndex, index);
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}
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lastIndex = index + 1;
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html += escape;
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}
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return lastIndex !== index ? html + str.substring(lastIndex, index) : html;
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}
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// end code copied and modified from escape-html
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/**
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* Escapes text to prevent scripting attacks.
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*
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* @param {*} text Text value to escape.
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* @return {string} An escaped string.
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*/
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function escapeTextContentForBrowser(text) {
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if (typeof text === 'boolean' || typeof text === 'number') {
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// this shortcircuit helps perf for types that we know will never have
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// special characters, especially given that this function is used often
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// for numeric dom ids.
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return '' + text;
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}
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return escapeHtml(text);
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}
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module.exports = escapeTextContentForBrowser; |