From 28d94d08d205bd2e9f8088ef61625687572f5e48 Mon Sep 17 00:00:00 2001
From: qigong <qigong@mogujie.com>
Date: Mon, 20 Nov 2017 18:55:59 +0800
Subject: [PATCH 01/15] test content fetch

---
 Plugin.php | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Plugin.php b/Plugin.php
index 7a51783..863e269 100755
--- a/Plugin.php
+++ b/Plugin.php
@@ -89,6 +89,8 @@ public static function Editor()
         <script type="text/javascript" src="<?php echo $jsUrl; ?>"></script>
         <script>
             $(document).ready(function() {
+                alert($('#text'));
+                $('#text').html('<p>abc</p>');
 
                 var textarea = $('#text').parent("p");
                 var isMarkdown = $('[name=markdown]').val()?1:0;

From 93919db32e1c28452f763a1c1c247a7ac3ed910c Mon Sep 17 00:00:00 2001
From: qigong <qigong@mogujie.com>
Date: Mon, 20 Nov 2017 19:14:05 +0800
Subject: [PATCH 02/15] add xss

---
 Plugin.php |    6 +-
 js/xss.js  | 1601 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 1605 insertions(+), 2 deletions(-)
 create mode 100644 js/xss.js

diff --git a/Plugin.php b/Plugin.php
index 863e269..67ae978 100755
--- a/Plugin.php
+++ b/Plugin.php
@@ -79,6 +79,7 @@ public static function Editor()
         $options = Helper::options();
         $cssUrl = $options->pluginUrl.'/EditorMD/css/editormd.css';
         $jsUrl = $options->pluginUrl.'/EditorMD/js/editormd.js';
+        $xssjsUrl = $options->pluginUrl.'/EditorMD/js/xss.js';
         $editormd = Typecho_Widget::widget('Widget_Options')->plugin('EditorMD');
         ?>
         <link rel="stylesheet" href="<?php echo $cssUrl; ?>" />
@@ -87,10 +88,11 @@ public static function Editor()
             var uploadURL = '<?php Helper::security()->index('/action/upload?cid=CID'); ?>';
         </script>
         <script type="text/javascript" src="<?php echo $jsUrl; ?>"></script>
+        <script type="text/javascript" src="<?php echo $xssjsUrl; ?>"></script>
         <script>
             $(document).ready(function() {
-                alert($('#text'));
-                $('#text').html('<p>abc</p>');
+                alert($('#text').html());
+                $('#text').html(filterXSS($('#text').html()));
 
                 var textarea = $('#text').parent("p");
                 var isMarkdown = $('[name=markdown]').val()?1:0;
diff --git a/js/xss.js b/js/xss.js
new file mode 100644
index 0000000..2a4488d
--- /dev/null
+++ b/js/xss.js
@@ -0,0 +1,1601 @@
+(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
+/**
+ * 默认配置
+ *
+ * @author 老雷<leizongmin@gmail.com>
+ */
+
+var FilterCSS = require('cssfilter').FilterCSS;
+var getDefaultCSSWhiteList = require('cssfilter').getDefaultWhiteList;
+var _ = require('./util');
+
+// 默认白名单
+function getDefaultWhiteList () {
+  return {
+    a:      ['target', 'href', 'title'],
+    abbr:   ['title'],
+    address: [],
+    area:   ['shape', 'coords', 'href', 'alt'],
+    article: [],
+    aside:  [],
+    audio:  ['autoplay', 'controls', 'loop', 'preload', 'src'],
+    b:      [],
+    bdi:    ['dir'],
+    bdo:    ['dir'],
+    big:    [],
+    blockquote: ['cite'],
+    br:     [],
+    caption: [],
+    center: [],
+    cite:   [],
+    code:   [],
+    col:    ['align', 'valign', 'span', 'width'],
+    colgroup: ['align', 'valign', 'span', 'width'],
+    dd:     [],
+    del:    ['datetime'],
+    details: ['open'],
+    div:    [],
+    dl:     [],
+    dt:     [],
+    em:     [],
+    font:   ['color', 'size', 'face'],
+    footer: [],
+    h1:     [],
+    h2:     [],
+    h3:     [],
+    h4:     [],
+    h5:     [],
+    h6:     [],
+    header: [],
+    hr:     [],
+    i:      [],
+    img:    ['src', 'alt', 'title', 'width', 'height'],
+    ins:    ['datetime'],
+    li:     [],
+    mark:   [],
+    nav:    [],
+    ol:     [],
+    p:      [],
+    pre:    [],
+    s:      [],
+    section:[],
+    small:  [],
+    span:   [],
+    sub:    [],
+    sup:    [],
+    strong: [],
+    table:  ['width', 'border', 'align', 'valign'],
+    tbody:  ['align', 'valign'],
+    td:     ['width', 'rowspan', 'colspan', 'align', 'valign'],
+    tfoot:  ['align', 'valign'],
+    th:     ['width', 'rowspan', 'colspan', 'align', 'valign'],
+    thead:  ['align', 'valign'],
+    tr:     ['rowspan', 'align', 'valign'],
+    tt:     [],
+    u:      [],
+    ul:     [],
+    video:  ['autoplay', 'controls', 'loop', 'preload', 'src', 'height', 'width']
+  };
+}
+
+// 默认CSS Filter
+var defaultCSSFilter = new FilterCSS();
+
+/**
+ * 匹配到标签时的处理方法
+ *
+ * @param {String} tag
+ * @param {String} html
+ * @param {Object} options
+ * @return {String}
+ */
+function onTag (tag, html, options) {
+  // do nothing
+}
+
+/**
+ * 匹配到不在白名单上的标签时的处理方法
+ *
+ * @param {String} tag
+ * @param {String} html
+ * @param {Object} options
+ * @return {String}
+ */
+function onIgnoreTag (tag, html, options) {
+  // do nothing
+}
+
+/**
+ * 匹配到标签属性时的处理方法
+ *
+ * @param {String} tag
+ * @param {String} name
+ * @param {String} value
+ * @return {String}
+ */
+function onTagAttr (tag, name, value) {
+  // do nothing
+}
+
+/**
+ * 匹配到不在白名单上的标签属性时的处理方法
+ *
+ * @param {String} tag
+ * @param {String} name
+ * @param {String} value
+ * @return {String}
+ */
+function onIgnoreTagAttr (tag, name, value) {
+  // do nothing
+}
+
+/**
+ * HTML转义
+ *
+ * @param {String} html
+ */
+function escapeHtml (html) {
+  return html.replace(REGEXP_LT, '&lt;').replace(REGEXP_GT, '&gt;');
+}
+
+/**
+ * 安全的标签属性值
+ *
+ * @param {String} tag
+ * @param {String} name
+ * @param {String} value
+ * @param {Object} cssFilter
+ * @return {String}
+ */
+function safeAttrValue (tag, name, value, cssFilter) {
+  // 转换为友好的属性值，再做判断
+  value = friendlyAttrValue(value);
+
+  if (name === 'href' || name === 'src') {
+    // 过滤 href 和 src 属性
+    // 仅允许 http:// | https:// | mailto: | / | # 开头的地址
+    value = _.trim(value);
+    if (value === '#') return '#';
+    if (!(value.substr(0, 7) === 'http://' ||
+         value.substr(0, 8) === 'https://' ||
+         value.substr(0, 7) === 'mailto:' ||
+         value[0] === '#' ||
+         value[0] === '/')) {
+      return '';
+    }
+  } else if (name === 'background') {
+    // 过滤 background 属性 （这个xss漏洞较老了，可能已经不适用）
+    // javascript:
+    REGEXP_DEFAULT_ON_TAG_ATTR_4.lastIndex = 0;
+    if (REGEXP_DEFAULT_ON_TAG_ATTR_4.test(value)) {
+      return '';
+    }
+  } else if (name === 'style') {
+    // /*注释*/
+    /*REGEXP_DEFAULT_ON_TAG_ATTR_3.lastIndex = 0;
+    if (REGEXP_DEFAULT_ON_TAG_ATTR_3.test(value)) {
+      return '';
+    }*/
+    // expression()
+    REGEXP_DEFAULT_ON_TAG_ATTR_7.lastIndex = 0;
+    if (REGEXP_DEFAULT_ON_TAG_ATTR_7.test(value)) {
+      return '';
+    }
+    // url()
+    REGEXP_DEFAULT_ON_TAG_ATTR_8.lastIndex = 0;
+    if (REGEXP_DEFAULT_ON_TAG_ATTR_8.test(value)) {
+      REGEXP_DEFAULT_ON_TAG_ATTR_4.lastIndex = 0;
+      if (REGEXP_DEFAULT_ON_TAG_ATTR_4.test(value)) {
+        return '';
+      }
+    }
+    if (cssFilter !== false) {
+      cssFilter = cssFilter || defaultCSSFilter;
+      value = cssFilter.process(value);
+    }
+  }
+
+  // 输出时需要转义<>"
+  value = escapeAttrValue(value);
+  return value;
+}
+
+// 正则表达式
+var REGEXP_LT = /</g;
+var REGEXP_GT = />/g;
+var REGEXP_QUOTE = /"/g;
+var REGEXP_QUOTE_2 = /&quot;/g;
+var REGEXP_ATTR_VALUE_1 = /&#([a-zA-Z0-9]*);?/img;
+var REGEXP_ATTR_VALUE_COLON = /&colon;?/img;
+var REGEXP_ATTR_VALUE_NEWLINE = /&newline;?/img;
+var REGEXP_DEFAULT_ON_TAG_ATTR_3 = /\/\*|\*\//mg;
+var REGEXP_DEFAULT_ON_TAG_ATTR_4 = /((j\s*a\s*v\s*a|v\s*b|l\s*i\s*v\s*e)\s*s\s*c\s*r\s*i\s*p\s*t\s*|m\s*o\s*c\s*h\s*a)\:/ig;
+var REGEXP_DEFAULT_ON_TAG_ATTR_5 = /^[\s"'`]*(d\s*a\s*t\s*a\s*)\:/ig;
+var REGEXP_DEFAULT_ON_TAG_ATTR_6 = /^[\s"'`]*(d\s*a\s*t\s*a\s*)\:\s*image\//ig;
+var REGEXP_DEFAULT_ON_TAG_ATTR_7 = /e\s*x\s*p\s*r\s*e\s*s\s*s\s*i\s*o\s*n\s*\(.*/ig;
+var REGEXP_DEFAULT_ON_TAG_ATTR_8 = /u\s*r\s*l\s*\(.*/ig;
+
+/**
+ * 对双引号进行转义
+ *
+ * @param {String} str
+ * @return {String} str
+ */
+function escapeQuote (str) {
+  return str.replace(REGEXP_QUOTE, '&quot;');
+}
+
+/**
+ * 对双引号进行转义
+ *
+ * @param {String} str
+ * @return {String} str
+ */
+function unescapeQuote (str) {
+  return str.replace(REGEXP_QUOTE_2, '"');
+}
+
+/**
+ * 对html实体编码进行转义
+ *
+ * @param {String} str
+ * @return {String}
+ */
+function escapeHtmlEntities (str) {
+  return str.replace(REGEXP_ATTR_VALUE_1, function replaceUnicode (str, code) {
+    return (code[0] === 'x' || code[0] === 'X')
+            ? String.fromCharCode(parseInt(code.substr(1), 16))
+            : String.fromCharCode(parseInt(code, 10));
+  });
+}
+
+/**
+ * 对html5新增的危险实体编码进行转义
+ *
+ * @param {String} str
+ * @return {String}
+ */
+function escapeDangerHtml5Entities (str) {
+  return str.replace(REGEXP_ATTR_VALUE_COLON, ':')
+            .replace(REGEXP_ATTR_VALUE_NEWLINE, ' ');
+}
+
+/**
+ * 清除不可见字符
+ *
+ * @param {String} str
+ * @return {String}
+ */
+function clearNonPrintableCharacter (str) {
+  var str2 = '';
+  for (var i = 0, len = str.length; i < len; i++) {
+    str2 += str.charCodeAt(i) < 32 ? ' ' : str.charAt(i);
+  }
+  return _.trim(str2);
+}
+
+/**
+ * 将标签的属性值转换成一般字符，便于分析
+ *
+ * @param {String} str
+ * @return {String}
+ */
+function friendlyAttrValue (str) {
+  str = unescapeQuote(str);             // 双引号
+  str = escapeHtmlEntities(str);         // 转换HTML实体编码
+  str = escapeDangerHtml5Entities(str);  // 转换危险的HTML5新增实体编码
+  str = clearNonPrintableCharacter(str); // 清除不可见字符
+  return str;
+}
+
+/**
+ * 转义用于输出的标签属性值
+ *
+ * @param {String} str
+ * @return {String}
+ */
+function escapeAttrValue (str) {
+  str = escapeQuote(str);
+  str = escapeHtml(str);
+  return str;
+}
+
+/**
+ * 去掉不在白名单中的标签onIgnoreTag处理方法
+ */
+function onIgnoreTagStripAll () {
+  return '';
+}
+
+/**
+ * 删除标签体
+ *
+ * @param {array} tags 要删除的标签列表
+ * @param {function} next 对不在列表中的标签的处理函数，可选
+ */
+function StripTagBody (tags, next) {
+  if (typeof(next) !== 'function') {
+    next = function () {};
+  }
+
+  var isRemoveAllTag = !Array.isArray(tags);
+  function isRemoveTag (tag) {
+    if (isRemoveAllTag) return true;
+    return (_.indexOf(tags, tag) !== -1);
+  }
+
+  var removeList = [];   // 要删除的位置范围列表
+  var posStart = false;  // 当前标签开始位置
+
+  return {
+    onIgnoreTag: function (tag, html, options) {
+      if (isRemoveTag(tag)) {
+        if (options.isClosing) {
+          var ret = '[/removed]';
+          var end = options.position + ret.length;
+          removeList.push([posStart !== false ? posStart : options.position, end]);
+          posStart = false;
+          return ret;
+        } else {
+          if (!posStart) {
+            posStart = options.position;
+          }
+          return '[removed]';
+        }
+      } else {
+        return next(tag, html, options);
+      }
+    },
+    remove: function (html) {
+      var rethtml = '';
+      var lastPos = 0;
+      _.forEach(removeList, function (pos) {
+        rethtml += html.slice(lastPos, pos[0]);
+        lastPos = pos[1];
+      });
+      rethtml += html.slice(lastPos);
+      return rethtml;
+    }
+  };
+}
+
+/**
+ * 去除备注标签
+ *
+ * @param {String} html
+ * @return {String}
+ */
+function stripCommentTag (html) {
+  return html.replace(STRIP_COMMENT_TAG_REGEXP, '');
+}
+var STRIP_COMMENT_TAG_REGEXP = /<!--[\s\S]*?-->/g;
+
+/**
+ * 去除不可见字符
+ *
+ * @param {String} html
+ * @return {String}
+ */
+function stripBlankChar (html) {
+  var chars = html.split('');
+  chars = chars.filter(function (char) {
+    var c = char.charCodeAt(0);
+    if (c === 127) return false;
+    if (c <= 31) {
+      if (c === 10 || c === 13) return true;
+      return false;
+    }
+    return true;
+  });
+  return chars.join('');
+}
+
+
+exports.whiteList = getDefaultWhiteList();
+exports.getDefaultWhiteList = getDefaultWhiteList;
+exports.onTag = onTag;
+exports.onIgnoreTag = onIgnoreTag;
+exports.onTagAttr = onTagAttr;
+exports.onIgnoreTagAttr = onIgnoreTagAttr;
+exports.safeAttrValue = safeAttrValue;
+exports.escapeHtml = escapeHtml;
+exports.escapeQuote = escapeQuote;
+exports.unescapeQuote = unescapeQuote;
+exports.escapeHtmlEntities = escapeHtmlEntities;
+exports.escapeDangerHtml5Entities = escapeDangerHtml5Entities;
+exports.clearNonPrintableCharacter = clearNonPrintableCharacter;
+exports.friendlyAttrValue = friendlyAttrValue;
+exports.escapeAttrValue = escapeAttrValue;
+exports.onIgnoreTagStripAll = onIgnoreTagStripAll;
+exports.StripTagBody = StripTagBody;
+exports.stripCommentTag = stripCommentTag;
+exports.stripBlankChar = stripBlankChar;
+exports.cssFilter = defaultCSSFilter;
+exports.getDefaultCSSWhiteList = getDefaultCSSWhiteList;
+
+},{"./util":4,"cssfilter":8}],2:[function(require,module,exports){
+/**
+ * 模块入口
+ *
+ * @author 老雷<leizongmin@gmail.com>
+ */
+
+var DEFAULT = require('./default');
+var parser = require('./parser');
+var FilterXSS = require('./xss');
+
+
+/**
+ * XSS过滤
+ *
+ * @param {String} html 要过滤的HTML代码
+ * @param {Object} options 选项：whiteList, onTag, onTagAttr, onIgnoreTag, onIgnoreTagAttr, safeAttrValue, escapeHtml
+ * @return {String}
+ */
+function filterXSS (html, options) {
+  var xss = new FilterXSS(options);
+  return xss.process(html);
+}
+
+
+// 输出
+exports = module.exports = filterXSS;
+exports.FilterXSS = FilterXSS;
+for (var i in DEFAULT) exports[i] = DEFAULT[i];
+for (var i in parser) exports[i] = parser[i];
+
+
+// 在浏览器端使用
+if (typeof window !== 'undefined') {
+  window.filterXSS = module.exports;
+}
+
+},{"./default":1,"./parser":3,"./xss":5}],3:[function(require,module,exports){
+/**
+ * 简单 HTML Parser
+ *
+ * @author 老雷<leizongmin@gmail.com>
+ */
+
+var _ = require('./util');
+
+/**
+ * 获取标签的名称
+ *
+ * @param {String} html 如：'<a hef="#">'
+ * @return {String}
+ */
+function getTagName (html) {
+  var i = _.spaceIndex(html);
+  if (i === -1) {
+    var tagName = html.slice(1, -1);
+  } else {
+    var tagName = html.slice(1, i + 1);
+  }
+  tagName = _.trim(tagName).toLowerCase();
+  if (tagName.slice(0, 1) === '/') tagName = tagName.slice(1);
+  if (tagName.slice(-1) === '/') tagName = tagName.slice(0, -1);
+  return tagName;
+}
+
+/**
+ * 是否为闭合标签
+ *
+ * @param {String} html 如：'<a hef="#">'
+ * @return {Boolean}
+ */
+function isClosing (html) {
+  return (html.slice(0, 2) === '</');
+}
+
+/**
+ * 分析HTML代码，调用相应的函数处理，返回处理后的HTML
+ *
+ * @param {String} html
+ * @param {Function} onTag 处理标签的函数
+ *   参数格式： function (sourcePosition, position, tag, html, isClosing)
+ * @param {Function} escapeHtml 对HTML进行转义的函数
+ * @return {String}
+ */
+function parseTag (html, onTag, escapeHtml) {
+  'user strict';
+
+  var rethtml = '';        // 待返回的HTML
+  var lastPos = 0;         // 上一个标签结束位置
+  var tagStart = false;    // 当前标签开始位置
+  var quoteStart = false;  // 引号开始位置
+  var currentPos = 0;      // 当前位置
+  var len = html.length;   // HTML长度
+  var currentHtml = '';    // 当前标签的HTML代码
+  var currentTagName = ''; // 当前标签的名称
+
+  // 逐个分析字符
+  for (currentPos = 0; currentPos < len; currentPos++) {
+    var c = html.charAt(currentPos);
+    if (tagStart === false) {
+      if (c === '<') {
+        tagStart = currentPos;
+        continue;
+      }
+    } else {
+      if (quoteStart === false) {
+        if (c === '<') {
+          rethtml += escapeHtml(html.slice(lastPos, currentPos));
+          tagStart = currentPos;
+          lastPos = currentPos;
+          continue;
+        }
+        if (c === '>') {
+          rethtml += escapeHtml(html.slice(lastPos, tagStart));
+          currentHtml = html.slice(tagStart, currentPos + 1);
+          currentTagName = getTagName(currentHtml);
+          rethtml += onTag(tagStart,
+                           rethtml.length,
+                           currentTagName,
+                           currentHtml,
+                           isClosing(currentHtml));
+          lastPos = currentPos + 1;
+          tagStart = false;
+          continue;
+        }
+        // HTML标签内的引号仅当前一个字符是等于号时才有效
+        if ((c === '"' || c === "'") && html.charAt(currentPos - 1) === '=') {
+          quoteStart = c;
+          continue;
+        }
+      } else {
+        if (c === quoteStart) {
+          quoteStart = false;
+          continue;
+        }
+      }
+    }
+  }
+  if (lastPos < html.length) {
+    rethtml += escapeHtml(html.substr(lastPos));
+  }
+
+  return rethtml;
+}
+
+// 不符合属性名称规则的正则表达式
+var REGEXP_ATTR_NAME = /[^a-zA-Z0-9_:\.\-]/img;
+
+/**
+ * 分析标签HTML代码，调用相应的函数处理，返回HTML
+ *
+ * @param {String} html 如标签'<a href="#" target="_blank">' 则为 'href="#" target="_blank"'
+ * @param {Function} onAttr 处理属性值的函数
+ *   函数格式： function (name, value)
+ * @return {String}
+ */
+function parseAttr (html, onAttr) {
+  'user strict';
+
+  var lastPos = 0;        // 当前位置
+  var retAttrs = [];      // 待返回的属性列表
+  var tmpName = false;    // 临时属性名称
+  var len = html.length;  // HTML代码长度
+
+  function addAttr (name, value) {
+    name = _.trim(name);
+    name = name.replace(REGEXP_ATTR_NAME, '').toLowerCase();
+    if (name.length < 1) return;
+    var ret = onAttr(name, value || '');
+    if (ret) retAttrs.push(ret);
+  };
+
+  // 逐个分析字符
+  for (var i = 0; i < len; i++) {
+    var c = html.charAt(i);
+    var v, j;
+    if (tmpName === false && c === '=') {
+      tmpName = html.slice(lastPos, i);
+      lastPos = i + 1;
+      continue;
+    }
+    if (tmpName !== false) {
+      // HTML标签内的引号仅当前一个字符是等于号时才有效
+      if (i === lastPos && (c === '"' || c === "'") && html.charAt(i - 1) === '=') {
+        j = html.indexOf(c, i + 1);
+        if (j === -1) {
+          break;
+        } else {
+          v = _.trim(html.slice(lastPos + 1, j));
+          addAttr(tmpName, v);
+          tmpName = false;
+          i = j;
+          lastPos = i + 1;
+          continue;
+        }
+      }
+    }
+    if (/\s|\n|\t/.test(c)) {
+      html = html.replace(/\s|\n|\t/g, ' ');
+      if (tmpName === false) {
+        j = findNextEqual(html, i);
+        if (j === -1) {
+          v = _.trim(html.slice(lastPos, i));
+          addAttr(v);
+          tmpName = false;
+          lastPos = i + 1;
+          continue;
+        } else {
+          i = j - 1;
+          continue;
+        }
+      } else {
+        j = findBeforeEqual(html, i - 1);
+        if (j === -1) {
+          v = _.trim(html.slice(lastPos, i));
+          v = stripQuoteWrap(v);
+          addAttr(tmpName, v);
+          tmpName = false;
+          lastPos = i + 1;
+          continue;
+        } else {
+          continue;
+        }
+      }
+    }
+  }
+
+  if (lastPos < html.length) {
+    if (tmpName === false) {
+      addAttr(html.slice(lastPos));
+    } else {
+      addAttr(tmpName, stripQuoteWrap(_.trim(html.slice(lastPos))));
+    }
+  }
+
+  return _.trim(retAttrs.join(' '));
+}
+
+function findNextEqual (str, i) {
+  for (; i < str.length; i++) {
+    var c = str[i];
+    if (c === ' ') continue;
+    if (c === '=') return i;
+    return -1;
+  }
+}
+
+function findBeforeEqual (str, i) {
+  for (; i > 0; i--) {
+    var c = str[i];
+    if (c === ' ') continue;
+    if (c === '=') return i;
+    return -1;
+  }
+}
+
+function isQuoteWrapString (text) {
+  if ((text[0] === '"' && text[text.length - 1] === '"') ||
+      (text[0] === '\'' && text[text.length - 1] === '\'')) {
+    return true;
+  } else {
+    return false;
+  }
+};
+
+function stripQuoteWrap (text) {
+  if (isQuoteWrapString(text)) {
+    return text.substr(1, text.length - 2);
+  } else {
+    return text;
+  }
+};
+
+
+exports.parseTag = parseTag;
+exports.parseAttr = parseAttr;
+
+},{"./util":4}],4:[function(require,module,exports){
+module.exports = {
+  indexOf: function (arr, item) {
+    var i, j;
+    if (Array.prototype.indexOf) {
+      return arr.indexOf(item);
+    }
+    for (i = 0, j = arr.length; i < j; i++) {
+      if (arr[i] === item) {
+        return i;
+      }
+    }
+    return -1;
+  },
+  forEach: function (arr, fn, scope) {
+    var i, j;
+    if (Array.prototype.forEach) {
+      return arr.forEach(fn, scope);
+    }
+    for (i = 0, j = arr.length; i < j; i++) {
+      fn.call(scope, arr[i], i, arr);
+    }
+  },
+  trim: function (str) {
+    if (String.prototype.trim) {
+      return str.trim();
+    }
+    return str.replace(/(^\s*)|(\s*$)/g, '');
+  },
+  spaceIndex: function (str) {
+      var reg = /\s|\n|\t/;
+      var match = reg.exec(str);
+      return match ? match.index : -1;
+  }
+};
+
+},{}],5:[function(require,module,exports){
+/**
+ * 过滤XSS
+ *
+ * @author 老雷<leizongmin@gmail.com>
+ */
+
+var FilterCSS = require('cssfilter').FilterCSS;
+var DEFAULT = require('./default');
+var parser = require('./parser');
+var parseTag = parser.parseTag;
+var parseAttr = parser.parseAttr;
+var _ = require('./util');
+
+
+/**
+ * 返回值是否为空
+ *
+ * @param {Object} obj
+ * @return {Boolean}
+ */
+function isNull (obj) {
+  return (obj === undefined || obj === null);
+}
+
+/**
+ * 取标签内的属性列表字符串
+ *
+ * @param {String} html
+ * @return {Object}
+ *   - {String} html
+ *   - {Boolean} closing
+ */
+function getAttrs (html) {
+  var i = _.spaceIndex(html);
+  if (i === -1) {
+    return {
+      html:    '',
+      closing: (html[html.length - 2] === '/')
+    };
+  }
+  html = _.trim(html.slice(i + 1, -1));
+  var isClosing = (html[html.length - 1] === '/');
+  if (isClosing) html = _.trim(html.slice(0, -1));
+  return {
+    html:    html,
+    closing: isClosing
+  };
+}
+
+/**
+ * 浅拷贝对象
+ *
+ * @param {Object} obj
+ * @return {Object}
+ */
+function shallowCopyObject (obj) {
+  var ret = {};
+  for (var i in obj) {
+    ret[i] = obj[i];
+  }
+  return ret;
+}
+
+/**
+ * XSS过滤对象
+ *
+ * @param {Object} options
+ *   选项：whiteList, onTag, onTagAttr, onIgnoreTag,
+ *        onIgnoreTagAttr, safeAttrValue, escapeHtml
+ *        stripIgnoreTagBody, allowCommentTag, stripBlankChar
+ *        css{whiteList, onAttr, onIgnoreAttr} css=false表示禁用cssfilter
+ */
+function FilterXSS (options) {
+  options = shallowCopyObject(options || {});
+
+  if (options.stripIgnoreTag) {
+    if (options.onIgnoreTag) {
+      console.error('Notes: cannot use these two options "stripIgnoreTag" and "onIgnoreTag" at the same time');
+    }
+    options.onIgnoreTag = DEFAULT.onIgnoreTagStripAll;
+  }
+
+  options.whiteList = options.whiteList || DEFAULT.whiteList;
+  options.onTag = options.onTag || DEFAULT.onTag;
+  options.onTagAttr = options.onTagAttr || DEFAULT.onTagAttr;
+  options.onIgnoreTag = options.onIgnoreTag || DEFAULT.onIgnoreTag;
+  options.onIgnoreTagAttr = options.onIgnoreTagAttr || DEFAULT.onIgnoreTagAttr;
+  options.safeAttrValue = options.safeAttrValue || DEFAULT.safeAttrValue;
+  options.escapeHtml = options.escapeHtml || DEFAULT.escapeHtml;
+  this.options = options;
+
+  if (options.css === false) {
+    this.cssFilter = false;
+  } else {
+    options.css = options.css || {};
+    this.cssFilter = new FilterCSS(options.css);
+  }
+}
+
+/**
+ * 开始处理
+ *
+ * @param {String} html
+ * @return {String}
+ */
+FilterXSS.prototype.process = function (html) {
+  // 兼容各种奇葩输入
+  html = html || '';
+  html = html.toString();
+  if (!html) return '';
+
+  var me = this;
+  var options = me.options;
+  var whiteList = options.whiteList;
+  var onTag = options.onTag;
+  var onIgnoreTag = options.onIgnoreTag;
+  var onTagAttr = options.onTagAttr;
+  var onIgnoreTagAttr = options.onIgnoreTagAttr;
+  var safeAttrValue = options.safeAttrValue;
+  var escapeHtml = options.escapeHtml;
+  var cssFilter = me.cssFilter;
+
+  // 是否清除不可见字符
+  if (options.stripBlankChar) {
+    html = DEFAULT.stripBlankChar(html);
+  }
+
+  // 是否禁止备注标签
+  if (!options.allowCommentTag) {
+    html = DEFAULT.stripCommentTag(html);
+  }
+
+  // 如果开启了stripIgnoreTagBody
+  var stripIgnoreTagBody = false;
+  if (options.stripIgnoreTagBody) {
+    var stripIgnoreTagBody = DEFAULT.StripTagBody(options.stripIgnoreTagBody, onIgnoreTag);
+    onIgnoreTag = stripIgnoreTagBody.onIgnoreTag;
+  }
+
+  var retHtml = parseTag(html, function (sourcePosition, position, tag, html, isClosing) {
+    var info = {
+      sourcePosition: sourcePosition,
+      position:       position,
+      isClosing:      isClosing,
+      isWhite:        (tag in whiteList)
+    };
+
+    // 调用onTag处理
+    var ret = onTag(tag, html, info);
+    if (!isNull(ret)) return ret;
+
+    // 默认标签处理方法
+    if (info.isWhite) {
+      // 白名单标签，解析标签属性
+      // 如果是闭合标签，则不需要解析属性
+      if (info.isClosing) {
+        return '</' + tag + '>';
+      }
+
+      var attrs = getAttrs(html);
+      var whiteAttrList = whiteList[tag];
+      var attrsHtml = parseAttr(attrs.html, function (name, value) {
+
+        // 调用onTagAttr处理
+        var isWhiteAttr = (_.indexOf(whiteAttrList, name) !== -1);
+        var ret = onTagAttr(tag, name, value, isWhiteAttr);
+        if (!isNull(ret)) return ret;
+
+        // 默认的属性处理方法
+        if (isWhiteAttr) {
+          // 白名单属性，调用safeAttrValue过滤属性值
+          value = safeAttrValue(tag, name, value, cssFilter);
+          if (value) {
+            return name + '="' + value + '"';
+          } else {
+            return name;
+          }
+        } else {
+          // 非白名单属性，调用onIgnoreTagAttr处理
+          var ret = onIgnoreTagAttr(tag, name, value, isWhiteAttr);
+          if (!isNull(ret)) return ret;
+          return;
+        }
+      });
+
+      // 构造新的标签代码
+      var html = '<' + tag;
+      if (attrsHtml) html += ' ' + attrsHtml;
+      if (attrs.closing) html += ' /';
+      html += '>';
+      return html;
+
+    } else {
+      // 非白名单标签，调用onIgnoreTag处理
+      var ret = onIgnoreTag(tag, html, info);
+      if (!isNull(ret)) return ret;
+      return escapeHtml(html);
+    }
+
+  }, escapeHtml);
+
+  // 如果开启了stripIgnoreTagBody，需要对结果再进行处理
+  if (stripIgnoreTagBody) {
+    retHtml = stripIgnoreTagBody.remove(retHtml);
+  }
+
+  return retHtml;
+};
+
+
+module.exports = FilterXSS;
+
+},{"./default":1,"./parser":3,"./util":4,"cssfilter":8}],6:[function(require,module,exports){
+/**
+ * cssfilter
+ *
+ * @author 老雷<leizongmin@gmail.com>
+ */
+
+var DEFAULT = require('./default');
+var parseStyle = require('./parser');
+var _ = require('./util');
+
+
+/**
+ * 返回值是否为空
+ *
+ * @param {Object} obj
+ * @return {Boolean}
+ */
+function isNull (obj) {
+  return (obj === undefined || obj === null);
+}
+
+/**
+ * 浅拷贝对象
+ *
+ * @param {Object} obj
+ * @return {Object}
+ */
+function shallowCopyObject (obj) {
+  var ret = {};
+  for (var i in obj) {
+    ret[i] = obj[i];
+  }
+  return ret;
+}
+
+/**
+ * 创建CSS过滤器
+ *
+ * @param {Object} options
+ *   - {Object} whiteList
+ *   - {Function} onAttr
+ *   - {Function} onIgnoreAttr
+ *   - {Function} safeAttrValue
+ */
+function FilterCSS (options) {
+  options = shallowCopyObject(options || {});
+  options.whiteList = options.whiteList || DEFAULT.whiteList;
+  options.onAttr = options.onAttr || DEFAULT.onAttr;
+  options.onIgnoreAttr = options.onIgnoreAttr || DEFAULT.onIgnoreAttr;
+  options.safeAttrValue = options.safeAttrValue || DEFAULT.safeAttrValue;
+  this.options = options;
+}
+
+FilterCSS.prototype.process = function (css) {
+  // 兼容各种奇葩输入
+  css = css || '';
+  css = css.toString();
+  if (!css) return '';
+
+  var me = this;
+  var options = me.options;
+  var whiteList = options.whiteList;
+  var onAttr = options.onAttr;
+  var onIgnoreAttr = options.onIgnoreAttr;
+  var safeAttrValue = options.safeAttrValue;
+
+  var retCSS = parseStyle(css, function (sourcePosition, position, name, value, source) {
+
+    var check = whiteList[name];
+    var isWhite = false;
+    if (check === true) isWhite = check;
+    else if (typeof check === 'function') isWhite = check(value);
+    else if (check instanceof RegExp) isWhite = check.test(value);
+    if (isWhite !== true) isWhite = false;
+
+    // 如果过滤后 value 为空则直接忽略
+    value = safeAttrValue(name, value);
+    if (!value) return;
+
+    var opts = {
+      position: position,
+      sourcePosition: sourcePosition,
+      source: source,
+      isWhite: isWhite
+    };
+
+    if (isWhite) {
+
+      var ret = onAttr(name, value, opts);
+      if (isNull(ret)) {
+        return name + ':' + value;
+      } else {
+        return ret;
+      }
+
+    } else {
+
+      var ret = onIgnoreAttr(name, value, opts);
+      if (!isNull(ret)) {
+        return ret;
+      }
+
+    }
+  });
+
+  return retCSS;
+};
+
+
+module.exports = FilterCSS;
+
+},{"./default":7,"./parser":9,"./util":10}],7:[function(require,module,exports){
+/**
+ * cssfilter
+ *
+ * @author 老雷<leizongmin@gmail.com>
+ */
+
+function getDefaultWhiteList () {
+  // 白名单值说明：
+  // true: 允许该属性
+  // Function: function (val) { } 返回true表示允许该属性，其他值均表示不允许
+  // RegExp: regexp.test(val) 返回true表示允许该属性，其他值均表示不允许
+  // 除上面列出的值外均表示不允许
+  var whiteList = {};
+
+  whiteList['align-content'] = false; // default: auto
+  whiteList['align-items'] = false; // default: auto
+  whiteList['align-self'] = false; // default: auto
+  whiteList['alignment-adjust'] = false; // default: auto
+  whiteList['alignment-baseline'] = false; // default: baseline
+  whiteList['all'] = false; // default: depending on individual properties
+  whiteList['anchor-point'] = false; // default: none
+  whiteList['animation'] = false; // default: depending on individual properties
+  whiteList['animation-delay'] = false; // default: 0
+  whiteList['animation-direction'] = false; // default: normal
+  whiteList['animation-duration'] = false; // default: 0
+  whiteList['animation-fill-mode'] = false; // default: none
+  whiteList['animation-iteration-count'] = false; // default: 1
+  whiteList['animation-name'] = false; // default: none
+  whiteList['animation-play-state'] = false; // default: running
+  whiteList['animation-timing-function'] = false; // default: ease
+  whiteList['azimuth'] = false; // default: center
+  whiteList['backface-visibility'] = false; // default: visible
+  whiteList['background'] = true; // default: depending on individual properties
+  whiteList['background-attachment'] = true; // default: scroll
+  whiteList['background-clip'] = true; // default: border-box
+  whiteList['background-color'] = true; // default: transparent
+  whiteList['background-image'] = true; // default: none
+  whiteList['background-origin'] = true; // default: padding-box
+  whiteList['background-position'] = true; // default: 0% 0%
+  whiteList['background-repeat'] = true; // default: repeat
+  whiteList['background-size'] = true; // default: auto
+  whiteList['baseline-shift'] = false; // default: baseline
+  whiteList['binding'] = false; // default: none
+  whiteList['bleed'] = false; // default: 6pt
+  whiteList['bookmark-label'] = false; // default: content()
+  whiteList['bookmark-level'] = false; // default: none
+  whiteList['bookmark-state'] = false; // default: open
+  whiteList['border'] = true; // default: depending on individual properties
+  whiteList['border-bottom'] = true; // default: depending on individual properties
+  whiteList['border-bottom-color'] = true; // default: current color
+  whiteList['border-bottom-left-radius'] = true; // default: 0
+  whiteList['border-bottom-right-radius'] = true; // default: 0
+  whiteList['border-bottom-style'] = true; // default: none
+  whiteList['border-bottom-width'] = true; // default: medium
+  whiteList['border-collapse'] = true; // default: separate
+  whiteList['border-color'] = true; // default: depending on individual properties
+  whiteList['border-image'] = true; // default: none
+  whiteList['border-image-outset'] = true; // default: 0
+  whiteList['border-image-repeat'] = true; // default: stretch
+  whiteList['border-image-slice'] = true; // default: 100%
+  whiteList['border-image-source'] = true; // default: none
+  whiteList['border-image-width'] = true; // default: 1
+  whiteList['border-left'] = true; // default: depending on individual properties
+  whiteList['border-left-color'] = true; // default: current color
+  whiteList['border-left-style'] = true; // default: none
+  whiteList['border-left-width'] = true; // default: medium
+  whiteList['border-radius'] = true; // default: 0
+  whiteList['border-right'] = true; // default: depending on individual properties
+  whiteList['border-right-color'] = true; // default: current color
+  whiteList['border-right-style'] = true; // default: none
+  whiteList['border-right-width'] = true; // default: medium
+  whiteList['border-spacing'] = true; // default: 0
+  whiteList['border-style'] = true; // default: depending on individual properties
+  whiteList['border-top'] = true; // default: depending on individual properties
+  whiteList['border-top-color'] = true; // default: current color
+  whiteList['border-top-left-radius'] = true; // default: 0
+  whiteList['border-top-right-radius'] = true; // default: 0
+  whiteList['border-top-style'] = true; // default: none
+  whiteList['border-top-width'] = true; // default: medium
+  whiteList['border-width'] = true; // default: depending on individual properties
+  whiteList['bottom'] = false; // default: auto
+  whiteList['box-decoration-break'] = true; // default: slice
+  whiteList['box-shadow'] = true; // default: none
+  whiteList['box-sizing'] = true; // default: content-box
+  whiteList['box-snap'] = true; // default: none
+  whiteList['box-suppress'] = true; // default: show
+  whiteList['break-after'] = true; // default: auto
+  whiteList['break-before'] = true; // default: auto
+  whiteList['break-inside'] = true; // default: auto
+  whiteList['caption-side'] = false; // default: top
+  whiteList['chains'] = false; // default: none
+  whiteList['clear'] = true; // default: none
+  whiteList['clip'] = false; // default: auto
+  whiteList['clip-path'] = false; // default: none
+  whiteList['clip-rule'] = false; // default: nonzero
+  whiteList['color'] = true; // default: implementation dependent
+  whiteList['color-interpolation-filters'] = true; // default: auto
+  whiteList['column-count'] = false; // default: auto
+  whiteList['column-fill'] = false; // default: balance
+  whiteList['column-gap'] = false; // default: normal
+  whiteList['column-rule'] = false; // default: depending on individual properties
+  whiteList['column-rule-color'] = false; // default: current color
+  whiteList['column-rule-style'] = false; // default: medium
+  whiteList['column-rule-width'] = false; // default: medium
+  whiteList['column-span'] = false; // default: none
+  whiteList['column-width'] = false; // default: auto
+  whiteList['columns'] = false; // default: depending on individual properties
+  whiteList['contain'] = false; // default: none
+  whiteList['content'] = false; // default: normal
+  whiteList['counter-increment'] = false; // default: none
+  whiteList['counter-reset'] = false; // default: none
+  whiteList['counter-set'] = false; // default: none
+  whiteList['crop'] = false; // default: auto
+  whiteList['cue'] = false; // default: depending on individual properties
+  whiteList['cue-after'] = false; // default: none
+  whiteList['cue-before'] = false; // default: none
+  whiteList['cursor'] = false; // default: auto
+  whiteList['direction'] = false; // default: ltr
+  whiteList['display'] = true; // default: depending on individual properties
+  whiteList['display-inside'] = true; // default: auto
+  whiteList['display-list'] = true; // default: none
+  whiteList['display-outside'] = true; // default: inline-level
+  whiteList['dominant-baseline'] = false; // default: auto
+  whiteList['elevation'] = false; // default: level
+  whiteList['empty-cells'] = false; // default: show
+  whiteList['filter'] = false; // default: none
+  whiteList['flex'] = false; // default: depending on individual properties
+  whiteList['flex-basis'] = false; // default: auto
+  whiteList['flex-direction'] = false; // default: row
+  whiteList['flex-flow'] = false; // default: depending on individual properties
+  whiteList['flex-grow'] = false; // default: 0
+  whiteList['flex-shrink'] = false; // default: 1
+  whiteList['flex-wrap'] = false; // default: nowrap
+  whiteList['float'] = false; // default: none
+  whiteList['float-offset'] = false; // default: 0 0
+  whiteList['flood-color'] = false; // default: black
+  whiteList['flood-opacity'] = false; // default: 1
+  whiteList['flow-from'] = false; // default: none
+  whiteList['flow-into'] = false; // default: none
+  whiteList['font'] = true; // default: depending on individual properties
+  whiteList['font-family'] = true; // default: implementation dependent
+  whiteList['font-feature-settings'] = true; // default: normal
+  whiteList['font-kerning'] = true; // default: auto
+  whiteList['font-language-override'] = true; // default: normal
+  whiteList['font-size'] = true; // default: medium
+  whiteList['font-size-adjust'] = true; // default: none
+  whiteList['font-stretch'] = true; // default: normal
+  whiteList['font-style'] = true; // default: normal
+  whiteList['font-synthesis'] = true; // default: weight style
+  whiteList['font-variant'] = true; // default: normal
+  whiteList['font-variant-alternates'] = true; // default: normal
+  whiteList['font-variant-caps'] = true; // default: normal
+  whiteList['font-variant-east-asian'] = true; // default: normal
+  whiteList['font-variant-ligatures'] = true; // default: normal
+  whiteList['font-variant-numeric'] = true; // default: normal
+  whiteList['font-variant-position'] = true; // default: normal
+  whiteList['font-weight'] = true; // default: normal
+  whiteList['grid'] = false; // default: depending on individual properties
+  whiteList['grid-area'] = false; // default: depending on individual properties
+  whiteList['grid-auto-columns'] = false; // default: auto
+  whiteList['grid-auto-flow'] = false; // default: none
+  whiteList['grid-auto-rows'] = false; // default: auto
+  whiteList['grid-column'] = false; // default: depending on individual properties
+  whiteList['grid-column-end'] = false; // default: auto
+  whiteList['grid-column-start'] = false; // default: auto
+  whiteList['grid-row'] = false; // default: depending on individual properties
+  whiteList['grid-row-end'] = false; // default: auto
+  whiteList['grid-row-start'] = false; // default: auto
+  whiteList['grid-template'] = false; // default: depending on individual properties
+  whiteList['grid-template-areas'] = false; // default: none
+  whiteList['grid-template-columns'] = false; // default: none
+  whiteList['grid-template-rows'] = false; // default: none
+  whiteList['hanging-punctuation'] = false; // default: none
+  whiteList['height'] = true; // default: auto
+  whiteList['hyphens'] = false; // default: manual
+  whiteList['icon'] = false; // default: auto
+  whiteList['image-orientation'] = false; // default: auto
+  whiteList['image-resolution'] = false; // default: normal
+  whiteList['ime-mode'] = false; // default: auto
+  whiteList['initial-letters'] = false; // default: normal
+  whiteList['inline-box-align'] = false; // default: last
+  whiteList['justify-content'] = false; // default: auto
+  whiteList['justify-items'] = false; // default: auto
+  whiteList['justify-self'] = false; // default: auto
+  whiteList['left'] = false; // default: auto
+  whiteList['letter-spacing'] = true; // default: normal
+  whiteList['lighting-color'] = true; // default: white
+  whiteList['line-box-contain'] = false; // default: block inline replaced
+  whiteList['line-break'] = false; // default: auto
+  whiteList['line-grid'] = false; // default: match-parent
+  whiteList['line-height'] = false; // default: normal
+  whiteList['line-snap'] = false; // default: none
+  whiteList['line-stacking'] = false; // default: depending on individual properties
+  whiteList['line-stacking-ruby'] = false; // default: exclude-ruby
+  whiteList['line-stacking-shift'] = false; // default: consider-shifts
+  whiteList['line-stacking-strategy'] = false; // default: inline-line-height
+  whiteList['list-style'] = true; // default: depending on individual properties
+  whiteList['list-style-image'] = true; // default: none
+  whiteList['list-style-position'] = true; // default: outside
+  whiteList['list-style-type'] = true; // default: disc
+  whiteList['margin'] = true; // default: depending on individual properties
+  whiteList['margin-bottom'] = true; // default: 0
+  whiteList['margin-left'] = true; // default: 0
+  whiteList['margin-right'] = true; // default: 0
+  whiteList['margin-top'] = true; // default: 0
+  whiteList['marker-offset'] = false; // default: auto
+  whiteList['marker-side'] = false; // default: list-item
+  whiteList['marks'] = false; // default: none
+  whiteList['mask'] = false; // default: border-box
+  whiteList['mask-box'] = false; // default: see individual properties
+  whiteList['mask-box-outset'] = false; // default: 0
+  whiteList['mask-box-repeat'] = false; // default: stretch
+  whiteList['mask-box-slice'] = false; // default: 0 fill
+  whiteList['mask-box-source'] = false; // default: none
+  whiteList['mask-box-width'] = false; // default: auto
+  whiteList['mask-clip'] = false; // default: border-box
+  whiteList['mask-image'] = false; // default: none
+  whiteList['mask-origin'] = false; // default: border-box
+  whiteList['mask-position'] = false; // default: center
+  whiteList['mask-repeat'] = false; // default: no-repeat
+  whiteList['mask-size'] = false; // default: border-box
+  whiteList['mask-source-type'] = false; // default: auto
+  whiteList['mask-type'] = false; // default: luminance
+  whiteList['max-height'] = true; // default: none
+  whiteList['max-lines'] = false; // default: none
+  whiteList['max-width'] = true; // default: none
+  whiteList['min-height'] = true; // default: 0
+  whiteList['min-width'] = true; // default: 0
+  whiteList['move-to'] = false; // default: normal
+  whiteList['nav-down'] = false; // default: auto
+  whiteList['nav-index'] = false; // default: auto
+  whiteList['nav-left'] = false; // default: auto
+  whiteList['nav-right'] = false; // default: auto
+  whiteList['nav-up'] = false; // default: auto
+  whiteList['object-fit'] = false; // default: fill
+  whiteList['object-position'] = false; // default: 50% 50%
+  whiteList['opacity'] = false; // default: 1
+  whiteList['order'] = false; // default: 0
+  whiteList['orphans'] = false; // default: 2
+  whiteList['outline'] = false; // default: depending on individual properties
+  whiteList['outline-color'] = false; // default: invert
+  whiteList['outline-offset'] = false; // default: 0
+  whiteList['outline-style'] = false; // default: none
+  whiteList['outline-width'] = false; // default: medium
+  whiteList['overflow'] = false; // default: depending on individual properties
+  whiteList['overflow-wrap'] = false; // default: normal
+  whiteList['overflow-x'] = false; // default: visible
+  whiteList['overflow-y'] = false; // default: visible
+  whiteList['padding'] = true; // default: depending on individual properties
+  whiteList['padding-bottom'] = true; // default: 0
+  whiteList['padding-left'] = true; // default: 0
+  whiteList['padding-right'] = true; // default: 0
+  whiteList['padding-top'] = true; // default: 0
+  whiteList['page'] = false; // default: auto
+  whiteList['page-break-after'] = false; // default: auto
+  whiteList['page-break-before'] = false; // default: auto
+  whiteList['page-break-inside'] = false; // default: auto
+  whiteList['page-policy'] = false; // default: start
+  whiteList['pause'] = false; // default: implementation dependent
+  whiteList['pause-after'] = false; // default: implementation dependent
+  whiteList['pause-before'] = false; // default: implementation dependent
+  whiteList['perspective'] = false; // default: none
+  whiteList['perspective-origin'] = false; // default: 50% 50%
+  whiteList['pitch'] = false; // default: medium
+  whiteList['pitch-range'] = false; // default: 50
+  whiteList['play-during'] = false; // default: auto
+  whiteList['position'] = false; // default: static
+  whiteList['presentation-level'] = false; // default: 0
+  whiteList['quotes'] = false; // default: text
+  whiteList['region-fragment'] = false; // default: auto
+  whiteList['resize'] = false; // default: none
+  whiteList['rest'] = false; // default: depending on individual properties
+  whiteList['rest-after'] = false; // default: none
+  whiteList['rest-before'] = false; // default: none
+  whiteList['richness'] = false; // default: 50
+  whiteList['right'] = false; // default: auto
+  whiteList['rotation'] = false; // default: 0
+  whiteList['rotation-point'] = false; // default: 50% 50%
+  whiteList['ruby-align'] = false; // default: auto
+  whiteList['ruby-merge'] = false; // default: separate
+  whiteList['ruby-position'] = false; // default: before
+  whiteList['shape-image-threshold'] = false; // default: 0.0
+  whiteList['shape-outside'] = false; // default: none
+  whiteList['shape-margin'] = false; // default: 0
+  whiteList['size'] = false; // default: auto
+  whiteList['speak'] = false; // default: auto
+  whiteList['speak-as'] = false; // default: normal
+  whiteList['speak-header'] = false; // default: once
+  whiteList['speak-numeral'] = false; // default: continuous
+  whiteList['speak-punctuation'] = false; // default: none
+  whiteList['speech-rate'] = false; // default: medium
+  whiteList['stress'] = false; // default: 50
+  whiteList['string-set'] = false; // default: none
+  whiteList['tab-size'] = false; // default: 8
+  whiteList['table-layout'] = false; // default: auto
+  whiteList['text-align'] = true; // default: start
+  whiteList['text-align-last'] = true; // default: auto
+  whiteList['text-combine-upright'] = true; // default: none
+  whiteList['text-decoration'] = true; // default: none
+  whiteList['text-decoration-color'] = true; // default: currentColor
+  whiteList['text-decoration-line'] = true; // default: none
+  whiteList['text-decoration-skip'] = true; // default: objects
+  whiteList['text-decoration-style'] = true; // default: solid
+  whiteList['text-emphasis'] = true; // default: depending on individual properties
+  whiteList['text-emphasis-color'] = true; // default: currentColor
+  whiteList['text-emphasis-position'] = true; // default: over right
+  whiteList['text-emphasis-style'] = true; // default: none
+  whiteList['text-height'] = true; // default: auto
+  whiteList['text-indent'] = true; // default: 0
+  whiteList['text-justify'] = true; // default: auto
+  whiteList['text-orientation'] = true; // default: mixed
+  whiteList['text-overflow'] = true; // default: clip
+  whiteList['text-shadow'] = true; // default: none
+  whiteList['text-space-collapse'] = true; // default: collapse
+  whiteList['text-transform'] = true; // default: none
+  whiteList['text-underline-position'] = true; // default: auto
+  whiteList['text-wrap'] = true; // default: normal
+  whiteList['top'] = false; // default: auto
+  whiteList['transform'] = false; // default: none
+  whiteList['transform-origin'] = false; // default: 50% 50% 0
+  whiteList['transform-style'] = false; // default: flat
+  whiteList['transition'] = false; // default: depending on individual properties
+  whiteList['transition-delay'] = false; // default: 0s
+  whiteList['transition-duration'] = false; // default: 0s
+  whiteList['transition-property'] = false; // default: all
+  whiteList['transition-timing-function'] = false; // default: ease
+  whiteList['unicode-bidi'] = false; // default: normal
+  whiteList['vertical-align'] = false; // default: baseline
+  whiteList['visibility'] = false; // default: visible
+  whiteList['voice-balance'] = false; // default: center
+  whiteList['voice-duration'] = false; // default: auto
+  whiteList['voice-family'] = false; // default: implementation dependent
+  whiteList['voice-pitch'] = false; // default: medium
+  whiteList['voice-range'] = false; // default: medium
+  whiteList['voice-rate'] = false; // default: normal
+  whiteList['voice-stress'] = false; // default: normal
+  whiteList['voice-volume'] = false; // default: medium
+  whiteList['volume'] = false; // default: medium
+  whiteList['white-space'] = false; // default: normal
+  whiteList['widows'] = false; // default: 2
+  whiteList['width'] = true; // default: auto
+  whiteList['will-change'] = false; // default: auto
+  whiteList['word-break'] = true; // default: normal
+  whiteList['word-spacing'] = true; // default: normal
+  whiteList['word-wrap'] = true; // default: normal
+  whiteList['wrap-flow'] = false; // default: auto
+  whiteList['wrap-through'] = false; // default: wrap
+  whiteList['writing-mode'] = false; // default: horizontal-tb
+  whiteList['z-index'] = false; // default: auto
+
+  return whiteList;
+}
+
+
+/**
+ * 匹配到白名单上的一个属性时
+ *
+ * @param {String} name
+ * @param {String} value
+ * @param {Object} options
+ * @return {String}
+ */
+function onAttr (name, value, options) {
+  // do nothing
+}
+
+/**
+ * 匹配到不在白名单上的一个属性时
+ *
+ * @param {String} name
+ * @param {String} value
+ * @param {Object} options
+ * @return {String}
+ */
+function onIgnoreAttr (name, value, options) {
+  // do nothing
+}
+
+var REGEXP_URL_JAVASCRIPT = /javascript\s*\:/img;
+
+/**
+ * 过滤属性值
+ *
+ * @param {String} name
+ * @param {String} value
+ * @return {String}
+ */
+function safeAttrValue(name, value) {
+  if (REGEXP_URL_JAVASCRIPT.test(value)) return '';
+  return value;
+}
+
+
+exports.whiteList = getDefaultWhiteList();
+exports.getDefaultWhiteList = getDefaultWhiteList;
+exports.onAttr = onAttr;
+exports.onIgnoreAttr = onIgnoreAttr;
+exports.safeAttrValue = safeAttrValue;
+
+},{}],8:[function(require,module,exports){
+/**
+ * cssfilter
+ *
+ * @author 老雷<leizongmin@gmail.com>
+ */
+
+var DEFAULT = require('./default');
+var FilterCSS = require('./css');
+
+
+/**
+ * XSS过滤
+ *
+ * @param {String} css 要过滤的CSS代码
+ * @param {Object} options 选项：whiteList, onAttr, onIgnoreAttr
+ * @return {String}
+ */
+function filterCSS (html, options) {
+  var xss = new FilterCSS(options);
+  return xss.process(html);
+}
+
+
+// 输出
+exports = module.exports = filterCSS;
+exports.FilterCSS = FilterCSS;
+for (var i in DEFAULT) exports[i] = DEFAULT[i];
+
+// 在浏览器端使用
+if (typeof window !== 'undefined') {
+  window.filterCSS = module.exports;
+}
+
+},{"./css":6,"./default":7}],9:[function(require,module,exports){
+/**
+ * cssfilter
+ *
+ * @author 老雷<leizongmin@gmail.com>
+ */
+
+var _ = require('./util');
+
+
+/**
+ * 解析style
+ *
+ * @param {String} css
+ * @param {Function} onAttr 处理属性的函数
+ *   参数格式： function (sourcePosition, position, name, value, source)
+ * @return {String}
+ */
+function parseStyle (css, onAttr) {
+  css = _.trimRight(css);
+  if (css[css.length - 1] !== ';') css += ';';
+  var cssLength = css.length;
+  var isParenthesisOpen = false;
+  var lastPos = 0;
+  var i = 0;
+  var retCSS = '';
+
+  function addNewAttr () {
+    // 如果没有正常的闭合圆括号，则直接忽略当前属性
+    if (!isParenthesisOpen) {
+      var source = _.trim(css.slice(lastPos, i));
+      var j = source.indexOf(':');
+      if (j !== -1) {
+        var name = _.trim(source.slice(0, j));
+        var value = _.trim(source.slice(j + 1));
+        // 必须有属性名称
+        if (name) {
+          var ret = onAttr(lastPos, retCSS.length, name, value, source);
+          if (ret) retCSS += ret + '; ';
+        }
+      }
+    }
+    lastPos = i + 1;
+  }
+
+  for (; i < cssLength; i++) {
+    var c = css[i];
+    if (c === '/' && css[i + 1] === '*') {
+      // 备注开始
+      var j = css.indexOf('*/', i + 2);
+      // 如果没有正常的备注结束，则后面的部分全部跳过
+      if (j === -1) break;
+      // 直接将当前位置调到备注结尾，并且初始化状态
+      i = j + 1;
+      lastPos = i + 1;
+      isParenthesisOpen = false;
+    } else if (c === '(') {
+      isParenthesisOpen = true;
+    } else if (c === ')') {
+      isParenthesisOpen = false;
+    } else if (c === ';') {
+      if (isParenthesisOpen) {
+        // 在圆括号里面，忽略
+      } else {
+        addNewAttr();
+      }
+    } else if (c === '\n') {
+      addNewAttr();
+    }
+  }
+
+  return _.trim(retCSS);
+}
+
+module.exports = parseStyle;
+
+},{"./util":10}],10:[function(require,module,exports){
+module.exports = {
+  indexOf: function (arr, item) {
+    var i, j;
+    if (Array.prototype.indexOf) {
+      return arr.indexOf(item);
+    }
+    for (i = 0, j = arr.length; i < j; i++) {
+      if (arr[i] === item) {
+        return i;
+      }
+    }
+    return -1;
+  },
+  forEach: function (arr, fn, scope) {
+    var i, j;
+    if (Array.prototype.forEach) {
+      return arr.forEach(fn, scope);
+    }
+    for (i = 0, j = arr.length; i < j; i++) {
+      fn.call(scope, arr[i], i, arr);
+    }
+  },
+  trim: function (str) {
+    if (String.prototype.trim) {
+      return str.trim();
+    }
+    return str.replace(/(^\s*)|(\s*$)/g, '');
+  },
+  trimRight: function (str) {
+    if (String.prototype.trimRight) {
+      return str.trimRight();
+    }
+    return str.replace(/(\s*$)/g, '');
+  }
+};
+
+},{}]},{},[2]);

From fb5489cc34837e71bc0e4e66b73af127f16f0ac6 Mon Sep 17 00:00:00 2001
From: qigong <qigong@mogujie.com>
Date: Mon, 20 Nov 2017 19:14:26 +0800
Subject: [PATCH 03/15] add xss filter logic

---
 Plugin.php | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Plugin.php b/Plugin.php
index 67ae978..ae27e3b 100755
--- a/Plugin.php
+++ b/Plugin.php
@@ -91,6 +91,7 @@ public static function Editor()
         <script type="text/javascript" src="<?php echo $xssjsUrl; ?>"></script>
         <script>
             $(document).ready(function() {
+                //test
                 alert($('#text').html());
                 $('#text').html(filterXSS($('#text').html()));
 

From a69f2a4871362453ebbe02b5d5054fff7ee5192b Mon Sep 17 00:00:00 2001
From: qigong <qigong@mogujie.com>
Date: Mon, 20 Nov 2017 19:17:26 +0800
Subject: [PATCH 04/15] add xss filter logic

---
 Plugin.php | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Plugin.php b/Plugin.php
index ae27e3b..ccd23cc 100755
--- a/Plugin.php
+++ b/Plugin.php
@@ -92,8 +92,9 @@ public static function Editor()
         <script>
             $(document).ready(function() {
                 //test
-                alert($('#text').html());
-                $('#text').html(filterXSS($('#text').html()));
+                var originalContent = filterXSS($('#text').html());
+                alert(originalContent);
+                $('#text').html(originalContent);
 
                 var textarea = $('#text').parent("p");
                 var isMarkdown = $('[name=markdown]').val()?1:0;

From 389f53e1a5e6b8231daa62c5b847155b5cbfd9cc Mon Sep 17 00:00:00 2001
From: qigong <qigong@mogujie.com>
Date: Mon, 20 Nov 2017 19:20:47 +0800
Subject: [PATCH 05/15] test

---
 Plugin.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Plugin.php b/Plugin.php
index ccd23cc..70836a0 100755
--- a/Plugin.php
+++ b/Plugin.php
@@ -92,6 +92,9 @@ public static function Editor()
         <script>
             $(document).ready(function() {
                 //test
+
+                var html = filterXSS('<script>alert("xss");</scr' + 'ipt>');
+                alert(html);
                 var originalContent = filterXSS($('#text').html());
                 alert(originalContent);
                 $('#text').html(originalContent);

From f867b26eb5e0effe67881f35f480fd330a0ffdb8 Mon Sep 17 00:00:00 2001
From: qigong <qigong@mogujie.com>
Date: Mon, 20 Nov 2017 19:25:11 +0800
Subject: [PATCH 06/15] test

---
 Plugin.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Plugin.php b/Plugin.php
index 70836a0..8f2a324 100755
--- a/Plugin.php
+++ b/Plugin.php
@@ -93,7 +93,7 @@ public static function Editor()
             $(document).ready(function() {
                 //test
 
-                var html = filterXSS('<script>alert("xss");</scr' + 'ipt>');
+                var html = filterXSS('<img src=1 onerror=alert(document.cookie)> <img src=http://x.h4rdy.me/sake>');
                 alert(html);
                 var originalContent = filterXSS($('#text').html());
                 alert(originalContent);

From 8d0f100a33f0f620ae55fd2c77a8da1704e81f1e Mon Sep 17 00:00:00 2001
From: qigong <qigong@mogujie.com>
Date: Mon, 20 Nov 2017 19:30:59 +0800
Subject: [PATCH 07/15] test

---
 js/xss.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/js/xss.js b/js/xss.js
index 2a4488d..bcf41e4 100644
--- a/js/xss.js
+++ b/js/xss.js
@@ -201,8 +201,8 @@ function safeAttrValue (tag, name, value, cssFilter) {
 }
 
 // 正则表达式
-var REGEXP_LT = /</g;
-var REGEXP_GT = />/g;
+var REGEXP_LT = /<|&lt;/g;
+var REGEXP_GT = />|&gt;/g;
 var REGEXP_QUOTE = /"/g;
 var REGEXP_QUOTE_2 = /&quot;/g;
 var REGEXP_ATTR_VALUE_1 = /&#([a-zA-Z0-9]*);?/img;

From 78a6b225c25ce1136759cb0139a4b4a474064e5f Mon Sep 17 00:00:00 2001
From: qigong <qigong@mogujie.com>
Date: Mon, 20 Nov 2017 19:37:59 +0800
Subject: [PATCH 08/15] test

---
 js/xss.js | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/js/xss.js b/js/xss.js
index bcf41e4..5897e36 100644
--- a/js/xss.js
+++ b/js/xss.js
@@ -135,7 +135,8 @@ function onIgnoreTagAttr (tag, name, value) {
  * @param {String} html
  */
 function escapeHtml (html) {
-  return html.replace(REGEXP_LT, '&lt;').replace(REGEXP_GT, '&gt;');
+  // return html.replace(REGEXP_LT, '&lt;').replace(REGEXP_GT, '&gt;');
+  return html;
 }
 
 /**
@@ -201,8 +202,8 @@ function safeAttrValue (tag, name, value, cssFilter) {
 }
 
 // 正则表达式
-var REGEXP_LT = /<|&lt;/g;
-var REGEXP_GT = />|&gt;/g;
+var REGEXP_LT = /</g;
+var REGEXP_GT = />/g;
 var REGEXP_QUOTE = /"/g;
 var REGEXP_QUOTE_2 = /&quot;/g;
 var REGEXP_ATTR_VALUE_1 = /&#([a-zA-Z0-9]*);?/img;

From cf0253456a6e6531300c2b00b091b201f43849e7 Mon Sep 17 00:00:00 2001
From: qigong <qigong@mogujie.com>
Date: Mon, 20 Nov 2017 19:46:09 +0800
Subject: [PATCH 09/15] test

---
 js/xss.js | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/js/xss.js b/js/xss.js
index 5897e36..d7775ee 100644
--- a/js/xss.js
+++ b/js/xss.js
@@ -135,8 +135,7 @@ function onIgnoreTagAttr (tag, name, value) {
  * @param {String} html
  */
 function escapeHtml (html) {
-  // return html.replace(REGEXP_LT, '&lt;').replace(REGEXP_GT, '&gt;');
-  return html;
+  return html.replace(REGEXP_LT, '&lt;').replace(REGEXP_GT, '&gt;');
 }
 
 /**
@@ -514,19 +513,19 @@ function parseTag (html, onTag, escapeHtml) {
   for (currentPos = 0; currentPos < len; currentPos++) {
     var c = html.charAt(currentPos);
     if (tagStart === false) {
-      if (c === '<') {
+      if (c === '<' || c === '&lt;' ) {
         tagStart = currentPos;
         continue;
       }
     } else {
       if (quoteStart === false) {
-        if (c === '<') {
+        if (c === '<' || c === '&lt;' ) {
           rethtml += escapeHtml(html.slice(lastPos, currentPos));
           tagStart = currentPos;
           lastPos = currentPos;
           continue;
         }
-        if (c === '>') {
+        if (c === '>' || c === '&gt;' ) {
           rethtml += escapeHtml(html.slice(lastPos, tagStart));
           currentHtml = html.slice(tagStart, currentPos + 1);
           currentTagName = getTagName(currentHtml);

From af8e409e0f4ff02b3a6b9232c17933ccd41be659 Mon Sep 17 00:00:00 2001
From: qigong <qigong@mogujie.com>
Date: Mon, 20 Nov 2017 19:52:10 +0800
Subject: [PATCH 10/15] fix bug

---
 js/xss.js | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/js/xss.js b/js/xss.js
index d7775ee..d87621b 100644
--- a/js/xss.js
+++ b/js/xss.js
@@ -512,20 +512,21 @@ function parseTag (html, onTag, escapeHtml) {
   // 逐个分析字符
   for (currentPos = 0; currentPos < len; currentPos++) {
     var c = html.charAt(currentPos);
+    var fourChars = currentPos<len-4 ? html.substring(currentPos, currentPos+4) : "";
     if (tagStart === false) {
-      if (c === '<' || c === '&lt;' ) {
+      if (c === '<' || fourChars === '&lt;' ) {
         tagStart = currentPos;
         continue;
       }
     } else {
       if (quoteStart === false) {
-        if (c === '<' || c === '&lt;' ) {
+        if (c === '<' || fourChars === '&lt;' ) {
           rethtml += escapeHtml(html.slice(lastPos, currentPos));
           tagStart = currentPos;
           lastPos = currentPos;
           continue;
         }
-        if (c === '>' || c === '&gt;' ) {
+        if (c === '>' || fourChars === '&gt;' ) {
           rethtml += escapeHtml(html.slice(lastPos, tagStart));
           currentHtml = html.slice(tagStart, currentPos + 1);
           currentTagName = getTagName(currentHtml);

From dffa0323284acf38e37d4586ae4a958191ef79ea Mon Sep 17 00:00:00 2001
From: qigong <qigong@mogujie.com>
Date: Mon, 20 Nov 2017 20:01:32 +0800
Subject: [PATCH 11/15] revert

---
 Plugin.php | 2 +-
 js/xss.js  | 7 +++----
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/Plugin.php b/Plugin.php
index 8f2a324..90390af 100755
--- a/Plugin.php
+++ b/Plugin.php
@@ -95,7 +95,7 @@ public static function Editor()
 
                 var html = filterXSS('<img src=1 onerror=alert(document.cookie)> <img src=http://x.h4rdy.me/sake>');
                 alert(html);
-                var originalContent = filterXSS($('#text').html());
+                var originalContent = filterXSS($('#text').html().replace('&lt;','<').replace('&gt;','>'));
                 alert(originalContent);
                 $('#text').html(originalContent);
 
diff --git a/js/xss.js b/js/xss.js
index d87621b..2a4488d 100644
--- a/js/xss.js
+++ b/js/xss.js
@@ -512,21 +512,20 @@ function parseTag (html, onTag, escapeHtml) {
   // 逐个分析字符
   for (currentPos = 0; currentPos < len; currentPos++) {
     var c = html.charAt(currentPos);
-    var fourChars = currentPos<len-4 ? html.substring(currentPos, currentPos+4) : "";
     if (tagStart === false) {
-      if (c === '<' || fourChars === '&lt;' ) {
+      if (c === '<') {
         tagStart = currentPos;
         continue;
       }
     } else {
       if (quoteStart === false) {
-        if (c === '<' || fourChars === '&lt;' ) {
+        if (c === '<') {
           rethtml += escapeHtml(html.slice(lastPos, currentPos));
           tagStart = currentPos;
           lastPos = currentPos;
           continue;
         }
-        if (c === '>' || fourChars === '&gt;' ) {
+        if (c === '>') {
           rethtml += escapeHtml(html.slice(lastPos, tagStart));
           currentHtml = html.slice(tagStart, currentPos + 1);
           currentTagName = getTagName(currentHtml);

From cc550a7c59820101d6613e86eee1e74de4f22357 Mon Sep 17 00:00:00 2001
From: qigong <qigong@mogujie.com>
Date: Mon, 20 Nov 2017 20:02:56 +0800
Subject: [PATCH 12/15] revert

---
 Plugin.php | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/Plugin.php b/Plugin.php
index 90390af..a579957 100755
--- a/Plugin.php
+++ b/Plugin.php
@@ -91,12 +91,9 @@ public static function Editor()
         <script type="text/javascript" src="<?php echo $xssjsUrl; ?>"></script>
         <script>
             $(document).ready(function() {
-                //test
 
-                var html = filterXSS('<img src=1 onerror=alert(document.cookie)> <img src=http://x.h4rdy.me/sake>');
-                alert(html);
+                //xss filter logic
                 var originalContent = filterXSS($('#text').html().replace('&lt;','<').replace('&gt;','>'));
-                alert(originalContent);
                 $('#text').html(originalContent);
 
                 var textarea = $('#text').parent("p");

From 9cd9d4fcba944c6b51555101439b914aeee9758a Mon Sep 17 00:00:00 2001
From: qigong <qigong@mogujie.com>
Date: Tue, 21 Nov 2017 11:25:16 +0800
Subject: [PATCH 13/15] add xss filter logic

---
 js/editormd.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/js/editormd.js b/js/editormd.js
index 7b482d6..4ab0108 100644
--- a/js/editormd.js
+++ b/js/editormd.js
@@ -1756,6 +1756,10 @@
             }
             
             cm.on("change", function(_cm, changeObj) {
+
+                //xss filter logic
+                var originalContent = filterXSS($('#text').html().replace('&lt;','<').replace('&gt;','>'));
+                $('#text').html(originalContent);
                 
                 if (settings.watch)
                 {

From 8d05b4ea1a15eb6b2c94a269f5bf0bbdc90091b3 Mon Sep 17 00:00:00 2001
From: qigong <qigong@mogujie.com>
Date: Tue, 21 Nov 2017 12:19:05 +0800
Subject: [PATCH 14/15] fix editer xss bug

---
 js/editormd.js | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/js/editormd.js b/js/editormd.js
index 4ab0108..7f91e50 100644
--- a/js/editormd.js
+++ b/js/editormd.js
@@ -1757,10 +1757,6 @@
             
             cm.on("change", function(_cm, changeObj) {
 
-                //xss filter logic
-                var originalContent = filterXSS($('#text').html().replace('&lt;','<').replace('&gt;','>'));
-                $('#text').html(originalContent);
-                
                 if (settings.watch)
                 {
                     _this.previewContainer.css("padding", settings.autoHeight ? "20px 20px 50px 40px" : "20px");
@@ -1965,7 +1961,7 @@
             var _this            = this;
             var state            = this.state;
             var settings         = this.settings;
-            var cm               = this.cm;            
+            var cm               = filterXSS(this.cm.replace('&lt;','<').replace('&gt;','>'));
             var cmValue          = cm.getValue();
             var previewContainer = this.previewContainer;
 

From ab16a3f07f7d814abdd1dd91bb0105555a9e5ff5 Mon Sep 17 00:00:00 2001
From: qigong <qigong@mogujie.com>
Date: Tue, 21 Nov 2017 12:22:16 +0800
Subject: [PATCH 15/15] fix

---
 js/editormd.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/js/editormd.js b/js/editormd.js
index 7f91e50..82b5c19 100644
--- a/js/editormd.js
+++ b/js/editormd.js
@@ -1961,8 +1961,8 @@
             var _this            = this;
             var state            = this.state;
             var settings         = this.settings;
-            var cm               = filterXSS(this.cm.replace('&lt;','<').replace('&gt;','>'));
-            var cmValue          = cm.getValue();
+            var cm               = this.cm;
+            var cmValue          = filterXSS(cm.getValue().replace('&lt;','<').replace('&gt;','>'));
             var previewContainer = this.previewContainer;
 
             if (settings.mode !== "gfm" && settings.mode !== "markdown")