diff --git a/rollup-sanitizer.config.js b/rollup-sanitizer.config.js
index c74d93fe9..a227a017c 100644
--- a/rollup-sanitizer.config.js
+++ b/rollup-sanitizer.config.js
@@ -1,6 +1,5 @@
 import resolve from 'rollup-plugin-node-resolve';
 import commonjs from 'rollup-plugin-commonjs';
-import { terser } from 'rollup-plugin-terser';
 
 export default {
   input: 'sanitizer/index.js',
@@ -22,15 +21,6 @@ export default {
         xss: ['xss'],
         cssfilter: ['cssfilter']
       }
-    }),
-    terser({
-      output: {
-        comments: function (node, comment) {
-          if (comment.type === 'comment2') {
-            return /@warning/i.test(comment.value);
-          }
-        }
-      }
     })
   ]
 };
diff --git a/sanitizer/sanitizer.js b/sanitizer/sanitizer.js
index 8581084e5..ff74da537 100644
--- a/sanitizer/sanitizer.js
+++ b/sanitizer/sanitizer.js
@@ -5,4 +5,1777 @@
  *
  * More Information: https://github.com/blockchain-certificates/blockcerts-verifier#modifying-the-sanitizer
  **/
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e=this.options,r=e.whiteList,i=e.onTag,n=e.onIgnoreTag,o=e.onTagAttr,a=e.onIgnoreTagAttr,s=e.safeAttrValue,l=e.escapeHtml,c=this.cssFilter;e.stripBlankChar&&(t=E.stripBlankChar(t)),e.allowCommentTag||(t=E.stripCommentTag(t));var f=!1;if(e.stripIgnoreTagBody){f=E.StripTagBody(e.stripIgnoreTagBody,n);n=f.onIgnoreTag}var g=P(t,(function(t,e,f,g,p){var d,h={sourcePosition:t,position:e,isClosing:p,isWhite:r.hasOwnProperty(f)};if(!N(d=i(f,g,h)))return d;if(h.isWhite){if(h.isClosing)return"</"+f+">";var m=function(t){var e=u.spaceIndex(t);if(-1===e)return{html:"",closing:"/"===t[t.length-2]};var r="/"===(t=u.trim(t.slice(e+1,-1)))[t.length-1];return r&&(t=u.trim(t.slice(0,-1))),{html:t,closing:r}}(g),b=r[f],v=G(m.html,(function(t,e){var r,i=-1!==u.indexOf(b,t);return N(r=o(f,t,e,i))?i?(e=s(f,t,e,c))?t+'="'+e+'"':t:N(r=a(f,t,e,i))?void 0:r:r}));g="<"+f;return v&&(g+=" "+v),m.closing&&(g+=" /"),g+=">"}return N(d=n(f,g,h))?l(g):d}),l);return f&&(g=f.remove(g)),g};var Z=Q,_=t((function(t,e){function r(t,e){return new Z(e).process(t)}for(var i in(e=t.exports=r).filterXSS=r,e.FilterXSS=Z,E)e[i]=E[i];for(var i in q)e[i]=q[i];"undefined"!=typeof window&&(window.filterXSS=t.exports),"undefined"!=typeof self&&"undefined"!=typeof DedicatedWorkerGlobalScope&&self instanceof DedicatedWorkerGlobalScope&&(self.filterXSS=t.exports)}));_.xss,_.filterXSS,_.FilterXSS;const J={...c.getDefaultWhiteList(),bottom:!0,left:!0,overflow:!0,position:!0,right:!0,top:!0,transform:!0,"transform-origin":!0,"flex-direction":!0,"align-items":!0};var K=/((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):/gi,M=/e\s*x\s*p\s*r\s*e\s*s\s*s\s*i\s*o\s*n\s*\(.*/gi,U=/u\s*r\s*l\s*\(.*/gi;const Y={whiteList:function(){const t=_.getDefaultWhiteList();return Object.keys(t).forEach(e=>{t[e].push("style"),t[e].push("class"),t[e].push("download")}),t}(),css:!1,stripIgnoreTagBody:!0,onTagAttr:function(t,e,r,i){if("style"===e)return`${e}="${c(r,{whiteList:J}).replace(/; /g,";")}"`;if("img"===t&&"src"===e&&function(t){return!!t.match(/^data:.+;base64,/)}(r)){const t=function(t){return t.split("base64,")[1]}(r);try{return atob(t),`${e}="${r}"`}catch(t){return e}}},safeAttrValue:function(t,e,r,i){if(r=_.friendlyAttrValue(r),"href"===e||"src"===e){if("#"===(r=function(t){if(String.prototype.trim)return t.trim();return t.replace(/(^\s*)|(\s*$)/g,"")}(r)))return"#";if(!function(t){return["http://","https://","mailto:","tel:","data:","#","/"].some(e=>t.substr(0,e.length)===e)}(r))return""}else if("background"===e){if(K.lastIndex=0,K.test(r))return""}else if("style"===e){if(M.lastIndex=0,M.test(r))return"";if(U.lastIndex=0,U.test(r)&&(K.lastIndex=0,K.test(r)))return"";!1!==i&&(r=(i=i||_.getDefaultCSSWhiteList()).process(r))}return r=_.escapeAttrValue(r)}},tt=new _.FilterXSS(Y);export default function(t){return tt.process(t)}
+
+function createCommonjsModule(fn, module) {
+	return module = { exports: {} }, fn(module, module.exports), 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;
+}
+
+
+var whiteList = getDefaultWhiteList();
+var getDefaultWhiteList_1 = getDefaultWhiteList;
+var onAttr_1 = onAttr;
+var onIgnoreAttr_1 = onIgnoreAttr;
+var safeAttrValue_1 = safeAttrValue;
+
+var _default = {
+	whiteList: whiteList,
+	getDefaultWhiteList: getDefaultWhiteList_1,
+	onAttr: onAttr_1,
+	onIgnoreAttr: onIgnoreAttr_1,
+	safeAttrValue: safeAttrValue_1
+};
+
+var util = {
+  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, '');
+  }
+};
+
+/**
+ * cssfilter
+ *
+ * @author 老雷<leizongmin@gmail.com>
+ */
+
+
+
+
+/**
+ * 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 = util.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 = util.trim(css.slice(lastPos, i));
+      var j = source.indexOf(':');
+      if (j !== -1) {
+        var name = util.trim(source.slice(0, j));
+        var value = util.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) ; else {
+        addNewAttr();
+      }
+    } else if (c === '\n') {
+      addNewAttr();
+    }
+  }
+
+  return util.trim(retCSS);
+}
+
+var parser = parseStyle;
+
+/**
+ * cssfilter
+ *
+ * @author 老雷<leizongmin@gmail.com>
+ */
+
+
+
+
+
+
+/**
+ * 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 = parser(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;
+};
+
+
+var css = FilterCSS;
+
+var lib = createCommonjsModule(function (module, exports) {
+/**
+ * cssfilter
+ *
+ * @author 老雷<leizongmin@gmail.com>
+ */
+
+
+
+
+
+/**
+ * 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 css(options);
+  return xss.process(html);
+}
+
+
+// 输出
+exports = module.exports = filterCSS;
+exports.FilterCSS = css;
+for (var i in _default) exports[i] = _default[i];
+
+// 在浏览器端使用
+if (typeof window !== 'undefined') {
+  window.filterCSS = module.exports;
+}
+});
+var lib_1 = lib.cssfilter;
+var lib_2 = lib.FilterCSS;
+
+var util$1 = {
+  indexOf: function(arr, item) {
+    var i, j;
+    if (Array.prototype.indexOf) {
+      return arr.indexOf(item);
+    }
+    for (i = 0, j = arr.length; i < j; i++) {
+      if (arr[i] === item) {
+        return i;
+      }
+    }
+    return -1;
+  },
+  forEach: function(arr, fn, scope) {
+    var i, j;
+    if (Array.prototype.forEach) {
+      return arr.forEach(fn, scope);
+    }
+    for (i = 0, j = arr.length; i < j; i++) {
+      fn.call(scope, arr[i], i, arr);
+    }
+  },
+  trim: function(str) {
+    if (String.prototype.trim) {
+      return str.trim();
+    }
+    return str.replace(/(^\s*)|(\s*$)/g, "");
+  },
+  spaceIndex: function(str) {
+    var reg = /\s|\n|\t/;
+    var match = reg.exec(str);
+    return match ? match.index : -1;
+  }
+};
+
+/**
+ * default settings
+ *
+ * @author Zongmin Lei<leizongmin@gmail.com>
+ */
+
+var FilterCSS$1 = lib.FilterCSS;
+var getDefaultCSSWhiteList = lib.getDefaultWhiteList;
+
+
+function getDefaultWhiteList$1() {
+  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"]
+  };
+}
+
+var defaultCSSFilter = new FilterCSS$1();
+
+/**
+ * default onTag function
+ *
+ * @param {String} tag
+ * @param {String} html
+ * @param {Object} options
+ * @return {String}
+ */
+function onTag(tag, html, options) {
+  // do nothing
+}
+
+/**
+ * default onIgnoreTag function
+ *
+ * @param {String} tag
+ * @param {String} html
+ * @param {Object} options
+ * @return {String}
+ */
+function onIgnoreTag(tag, html, options) {
+  // do nothing
+}
+
+/**
+ * default onTagAttr function
+ *
+ * @param {String} tag
+ * @param {String} name
+ * @param {String} value
+ * @return {String}
+ */
+function onTagAttr(tag, name, value) {
+  // do nothing
+}
+
+/**
+ * default onIgnoreTagAttr function
+ *
+ * @param {String} tag
+ * @param {String} name
+ * @param {String} value
+ * @return {String}
+ */
+function onIgnoreTagAttr(tag, name, value) {
+  // do nothing
+}
+
+/**
+ * default escapeHtml function
+ *
+ * @param {String} html
+ */
+function escapeHtml(html) {
+  return html.replace(REGEXP_LT, "&lt;").replace(REGEXP_GT, "&gt;");
+}
+
+/**
+ * default safeAttrValue function
+ *
+ * @param {String} tag
+ * @param {String} name
+ * @param {String} value
+ * @param {Object} cssFilter
+ * @return {String}
+ */
+function safeAttrValue$1(tag, name, value, cssFilter) {
+  // unescape attribute value firstly
+  value = friendlyAttrValue(value);
+
+  if (name === "href" || name === "src") {
+    // filter `href` and `src` attribute
+    // only allow the value that starts with `http://` | `https://` | `mailto:` | `/` | `#`
+    value = util$1.trim(value);
+    if (value === "#") return "#";
+    if (
+      !(
+        value.substr(0, 7) === "http://" ||
+        value.substr(0, 8) === "https://" ||
+        value.substr(0, 7) === "mailto:" ||
+        value.substr(0, 4) === "tel:" ||
+        value[0] === "#" ||
+        value[0] === "/"
+      )
+    ) {
+      return "";
+    }
+  } else if (name === "background") {
+    // filter `background` attribute (maybe no use)
+    // `javascript:`
+    REGEXP_DEFAULT_ON_TAG_ATTR_4.lastIndex = 0;
+    if (REGEXP_DEFAULT_ON_TAG_ATTR_4.test(value)) {
+      return "";
+    }
+  } else if (name === "style") {
+    // `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);
+    }
+  }
+
+  // escape `<>"` before returns
+  value = escapeAttrValue(value);
+  return value;
+}
+
+// RegExp list
+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]*);?/gim;
+var REGEXP_ATTR_VALUE_COLON = /&colon;?/gim;
+var REGEXP_ATTR_VALUE_NEWLINE = /&newline;?/gim;
+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)\:/gi;
+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*\(.*/gi;
+var REGEXP_DEFAULT_ON_TAG_ATTR_8 = /u\s*r\s*l\s*\(.*/gi;
+
+/**
+ * escape doube quote
+ *
+ * @param {String} str
+ * @return {String} str
+ */
+function escapeQuote(str) {
+  return str.replace(REGEXP_QUOTE, "&quot;");
+}
+
+/**
+ * unescape double quote
+ *
+ * @param {String} str
+ * @return {String} str
+ */
+function unescapeQuote(str) {
+  return str.replace(REGEXP_QUOTE_2, '"');
+}
+
+/**
+ * escape html entities
+ *
+ * @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));
+  });
+}
+
+/**
+ * escape html5 new danger entities
+ *
+ * @param {String} str
+ * @return {String}
+ */
+function escapeDangerHtml5Entities(str) {
+  return str
+    .replace(REGEXP_ATTR_VALUE_COLON, ":")
+    .replace(REGEXP_ATTR_VALUE_NEWLINE, " ");
+}
+
+/**
+ * clear nonprintable characters
+ *
+ * @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 util$1.trim(str2);
+}
+
+/**
+ * get friendly attribute value
+ *
+ * @param {String} str
+ * @return {String}
+ */
+function friendlyAttrValue(str) {
+  str = unescapeQuote(str);
+  str = escapeHtmlEntities(str);
+  str = escapeDangerHtml5Entities(str);
+  str = clearNonPrintableCharacter(str);
+  return str;
+}
+
+/**
+ * unescape attribute value
+ *
+ * @param {String} str
+ * @return {String}
+ */
+function escapeAttrValue(str) {
+  str = escapeQuote(str);
+  str = escapeHtml(str);
+  return str;
+}
+
+/**
+ * `onIgnoreTag` function for removing all the tags that are not in whitelist
+ */
+function onIgnoreTagStripAll() {
+  return "";
+}
+
+/**
+ * remove tag body
+ * specify a `tags` list, if the tag is not in the `tags` list then process by the specify function (optional)
+ *
+ * @param {array} tags
+ * @param {function} next
+ */
+function StripTagBody(tags, next) {
+  if (typeof next !== "function") {
+    next = function() {};
+  }
+
+  var isRemoveAllTag = !Array.isArray(tags);
+  function isRemoveTag(tag) {
+    if (isRemoveAllTag) return true;
+    return util$1.indexOf(tags, tag) !== -1;
+  }
+
+  var removeList = [];
+  var posStart = false;
+
+  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;
+      util$1.forEach(removeList, function(pos) {
+        rethtml += html.slice(lastPos, pos[0]);
+        lastPos = pos[1];
+      });
+      rethtml += html.slice(lastPos);
+      return rethtml;
+    }
+  };
+}
+
+/**
+ * remove html comments
+ *
+ * @param {String} html
+ * @return {String}
+ */
+function stripCommentTag(html) {
+  return html.replace(STRIP_COMMENT_TAG_REGEXP, "");
+}
+var STRIP_COMMENT_TAG_REGEXP = /<!--[\s\S]*?-->/g;
+
+/**
+ * remove invisible characters
+ *
+ * @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("");
+}
+
+var whiteList$1 = getDefaultWhiteList$1();
+var getDefaultWhiteList_1$1 = getDefaultWhiteList$1;
+var onTag_1 = onTag;
+var onIgnoreTag_1 = onIgnoreTag;
+var onTagAttr_1 = onTagAttr;
+var onIgnoreTagAttr_1 = onIgnoreTagAttr;
+var safeAttrValue_1$1 = safeAttrValue$1;
+var escapeHtml_1 = escapeHtml;
+var escapeQuote_1 = escapeQuote;
+var unescapeQuote_1 = unescapeQuote;
+var escapeHtmlEntities_1 = escapeHtmlEntities;
+var escapeDangerHtml5Entities_1 = escapeDangerHtml5Entities;
+var clearNonPrintableCharacter_1 = clearNonPrintableCharacter;
+var friendlyAttrValue_1 = friendlyAttrValue;
+var escapeAttrValue_1 = escapeAttrValue;
+var onIgnoreTagStripAll_1 = onIgnoreTagStripAll;
+var StripTagBody_1 = StripTagBody;
+var stripCommentTag_1 = stripCommentTag;
+var stripBlankChar_1 = stripBlankChar;
+var cssFilter = defaultCSSFilter;
+var getDefaultCSSWhiteList_1 = getDefaultCSSWhiteList;
+
+var _default$1 = {
+	whiteList: whiteList$1,
+	getDefaultWhiteList: getDefaultWhiteList_1$1,
+	onTag: onTag_1,
+	onIgnoreTag: onIgnoreTag_1,
+	onTagAttr: onTagAttr_1,
+	onIgnoreTagAttr: onIgnoreTagAttr_1,
+	safeAttrValue: safeAttrValue_1$1,
+	escapeHtml: escapeHtml_1,
+	escapeQuote: escapeQuote_1,
+	unescapeQuote: unescapeQuote_1,
+	escapeHtmlEntities: escapeHtmlEntities_1,
+	escapeDangerHtml5Entities: escapeDangerHtml5Entities_1,
+	clearNonPrintableCharacter: clearNonPrintableCharacter_1,
+	friendlyAttrValue: friendlyAttrValue_1,
+	escapeAttrValue: escapeAttrValue_1,
+	onIgnoreTagStripAll: onIgnoreTagStripAll_1,
+	StripTagBody: StripTagBody_1,
+	stripCommentTag: stripCommentTag_1,
+	stripBlankChar: stripBlankChar_1,
+	cssFilter: cssFilter,
+	getDefaultCSSWhiteList: getDefaultCSSWhiteList_1
+};
+
+/**
+ * Simple HTML Parser
+ *
+ * @author Zongmin Lei<leizongmin@gmail.com>
+ */
+
+
+
+/**
+ * get tag name
+ *
+ * @param {String} html e.g. '<a hef="#">'
+ * @return {String}
+ */
+function getTagName(html) {
+  var i = util$1.spaceIndex(html);
+  if (i === -1) {
+    var tagName = html.slice(1, -1);
+  } else {
+    var tagName = html.slice(1, i + 1);
+  }
+  tagName = util$1.trim(tagName).toLowerCase();
+  if (tagName.slice(0, 1) === "/") tagName = tagName.slice(1);
+  if (tagName.slice(-1) === "/") tagName = tagName.slice(0, -1);
+  return tagName;
+}
+
+/**
+ * is close tag?
+ *
+ * @param {String} html 如：'<a hef="#">'
+ * @return {Boolean}
+ */
+function isClosing(html) {
+  return html.slice(0, 2) === "</";
+}
+
+/**
+ * parse input html and returns processed html
+ *
+ * @param {String} html
+ * @param {Function} onTag e.g. function (sourcePosition, position, tag, html, isClosing)
+ * @param {Function} escapeHtml
+ * @return {String}
+ */
+function parseTag(html, onTag, escapeHtml) {
+  "user strict";
+
+  var rethtml = "";
+  var lastPos = 0;
+  var tagStart = false;
+  var quoteStart = false;
+  var currentPos = 0;
+  var len = html.length;
+  var currentTagName = "";
+  var currentHtml = "";
+
+  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;
+        }
+        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;
+}
+
+var REGEXP_ILLEGAL_ATTR_NAME = /[^a-zA-Z0-9_:\.\-]/gim;
+
+/**
+ * parse input attributes and returns processed attributes
+ *
+ * @param {String} html e.g. `href="#" target="_blank"`
+ * @param {Function} onAttr e.g. `function (name, value)`
+ * @return {String}
+ */
+function parseAttr(html, onAttr) {
+  "user strict";
+
+  var lastPos = 0;
+  var retAttrs = [];
+  var tmpName = false;
+  var len = html.length;
+
+  function addAttr(name, value) {
+    name = util$1.trim(name);
+    name = name.replace(REGEXP_ILLEGAL_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) {
+      if (
+        i === lastPos &&
+        (c === '"' || c === "'") &&
+        html.charAt(i - 1) === "="
+      ) {
+        j = html.indexOf(c, i + 1);
+        if (j === -1) {
+          break;
+        } else {
+          v = util$1.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 = util$1.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 = util$1.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(util$1.trim(html.slice(lastPos))));
+    }
+  }
+
+  return util$1.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;
+  }
+}
+
+var parseTag_1 = parseTag;
+var parseAttr_1 = parseAttr;
+
+var parser$1 = {
+	parseTag: parseTag_1,
+	parseAttr: parseAttr_1
+};
+
+/**
+ * filter xss
+ *
+ * @author Zongmin Lei<leizongmin@gmail.com>
+ */
+
+var FilterCSS$2 = lib.FilterCSS;
+
+
+var parseTag$1 = parser$1.parseTag;
+var parseAttr$1 = parser$1.parseAttr;
+
+
+/**
+ * returns `true` if the input value is `undefined` or `null`
+ *
+ * @param {Object} obj
+ * @return {Boolean}
+ */
+function isNull$1(obj) {
+  return obj === undefined || obj === null;
+}
+
+/**
+ * get attributes for a tag
+ *
+ * @param {String} html
+ * @return {Object}
+ *   - {String} html
+ *   - {Boolean} closing
+ */
+function getAttrs(html) {
+  var i = util$1.spaceIndex(html);
+  if (i === -1) {
+    return {
+      html: "",
+      closing: html[html.length - 2] === "/"
+    };
+  }
+  html = util$1.trim(html.slice(i + 1, -1));
+  var isClosing = html[html.length - 1] === "/";
+  if (isClosing) html = util$1.trim(html.slice(0, -1));
+  return {
+    html: html,
+    closing: isClosing
+  };
+}
+
+/**
+ * shallow copy
+ *
+ * @param {Object} obj
+ * @return {Object}
+ */
+function shallowCopyObject$1(obj) {
+  var ret = {};
+  for (var i in obj) {
+    ret[i] = obj[i];
+  }
+  return ret;
+}
+
+/**
+ * FilterXSS class
+ *
+ * @param {Object} options
+ *        whiteList, onTag, onTagAttr, onIgnoreTag,
+ *        onIgnoreTagAttr, safeAttrValue, escapeHtml
+ *        stripIgnoreTagBody, allowCommentTag, stripBlankChar
+ *        css{whiteList, onAttr, onIgnoreAttr} `css=false` means don't use `cssfilter`
+ */
+function FilterXSS(options) {
+  options = shallowCopyObject$1(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$1.onIgnoreTagStripAll;
+  }
+
+  options.whiteList = options.whiteList || _default$1.whiteList;
+  options.onTag = options.onTag || _default$1.onTag;
+  options.onTagAttr = options.onTagAttr || _default$1.onTagAttr;
+  options.onIgnoreTag = options.onIgnoreTag || _default$1.onIgnoreTag;
+  options.onIgnoreTagAttr = options.onIgnoreTagAttr || _default$1.onIgnoreTagAttr;
+  options.safeAttrValue = options.safeAttrValue || _default$1.safeAttrValue;
+  options.escapeHtml = options.escapeHtml || _default$1.escapeHtml;
+  this.options = options;
+
+  if (options.css === false) {
+    this.cssFilter = false;
+  } else {
+    options.css = options.css || {};
+    this.cssFilter = new FilterCSS$2(options.css);
+  }
+}
+
+/**
+ * start process and returns result
+ *
+ * @param {String} html
+ * @return {String}
+ */
+FilterXSS.prototype.process = function(html) {
+  // compatible with the input
+  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;
+
+  // remove invisible characters
+  if (options.stripBlankChar) {
+    html = _default$1.stripBlankChar(html);
+  }
+
+  // remove html comments
+  if (!options.allowCommentTag) {
+    html = _default$1.stripCommentTag(html);
+  }
+
+  // if enable stripIgnoreTagBody
+  var stripIgnoreTagBody = false;
+  if (options.stripIgnoreTagBody) {
+    var stripIgnoreTagBody = _default$1.StripTagBody(
+      options.stripIgnoreTagBody,
+      onIgnoreTag
+    );
+    onIgnoreTag = stripIgnoreTagBody.onIgnoreTag;
+  }
+
+  var retHtml = parseTag$1(
+    html,
+    function(sourcePosition, position, tag, html, isClosing) {
+      var info = {
+        sourcePosition: sourcePosition,
+        position: position,
+        isClosing: isClosing,
+        isWhite: whiteList.hasOwnProperty(tag)
+      };
+
+      // call `onTag()`
+      var ret = onTag(tag, html, info);
+      if (!isNull$1(ret)) return ret;
+
+      if (info.isWhite) {
+        if (info.isClosing) {
+          return "</" + tag + ">";
+        }
+
+        var attrs = getAttrs(html);
+        var whiteAttrList = whiteList[tag];
+        var attrsHtml = parseAttr$1(attrs.html, function(name, value) {
+          // call `onTagAttr()`
+          var isWhiteAttr = util$1.indexOf(whiteAttrList, name) !== -1;
+          var ret = onTagAttr(tag, name, value, isWhiteAttr);
+          if (!isNull$1(ret)) return ret;
+
+          if (isWhiteAttr) {
+            // call `safeAttrValue()`
+            value = safeAttrValue(tag, name, value, cssFilter);
+            if (value) {
+              return name + '="' + value + '"';
+            } else {
+              return name;
+            }
+          } else {
+            // call `onIgnoreTagAttr()`
+            var ret = onIgnoreTagAttr(tag, name, value, isWhiteAttr);
+            if (!isNull$1(ret)) return ret;
+            return;
+          }
+        });
+
+        // build new tag html
+        var html = "<" + tag;
+        if (attrsHtml) html += " " + attrsHtml;
+        if (attrs.closing) html += " /";
+        html += ">";
+        return html;
+      } else {
+        // call `onIgnoreTag()`
+        var ret = onIgnoreTag(tag, html, info);
+        if (!isNull$1(ret)) return ret;
+        return escapeHtml(html);
+      }
+    },
+    escapeHtml
+  );
+
+  // if enable stripIgnoreTagBody
+  if (stripIgnoreTagBody) {
+    retHtml = stripIgnoreTagBody.remove(retHtml);
+  }
+
+  return retHtml;
+};
+
+var xss = FilterXSS;
+
+var lib$1 = createCommonjsModule(function (module, exports) {
+/**
+ * xss
+ *
+ * @author Zongmin Lei<leizongmin@gmail.com>
+ */
+
+
+
+
+
+/**
+ * filter xss function
+ *
+ * @param {String} html
+ * @param {Object} options { whiteList, onTag, onTagAttr, onIgnoreTag, onIgnoreTagAttr, safeAttrValue, escapeHtml }
+ * @return {String}
+ */
+function filterXSS(html, options) {
+  var xss$1 = new xss(options);
+  return xss$1.process(html);
+}
+
+exports = module.exports = filterXSS;
+exports.filterXSS = filterXSS;
+exports.FilterXSS = xss;
+for (var i in _default$1) exports[i] = _default$1[i];
+for (var i in parser$1) exports[i] = parser$1[i];
+
+// using `xss` on the browser, output `filterXSS` to the globals
+if (typeof window !== "undefined") {
+  window.filterXSS = module.exports;
+}
+
+// using `xss` on the WebWorker, output `filterXSS` to the globals
+function isWorkerEnv() {
+  return typeof self !== 'undefined' && typeof DedicatedWorkerGlobalScope !== 'undefined' && self instanceof DedicatedWorkerGlobalScope;
+}
+if (isWorkerEnv()) {
+  self.filterXSS = module.exports;
+}
+});
+var lib_1$1 = lib$1.xss;
+var lib_2$1 = lib$1.filterXSS;
+var lib_3 = lib$1.FilterXSS;
+
+function isBase64 (value) {
+  const test = /^data:.+;base64,/;
+  return !!value.match(test);
+}
+
+function getBase64Data (value) {
+  const data = value.split('base64,')[1];
+  return data;
+}
+
+const whiteListedCssProperties = {
+  ...lib.getDefaultWhiteList(),
+  bottom: true,
+  left: true,
+  overflow: true,
+  position: true,
+  right: true,
+  top: true,
+  transform: true,
+  'transform-origin': true,
+  'flex-direction': true,
+  'align-items': true
+};
+
+function modifyWhiteList () {
+  const whiteList = lib$1.getDefaultWhiteList();
+  Object.keys(whiteList).forEach(el => {
+    whiteList[el].push('style');
+    whiteList[el].push('class');
+    whiteList[el].push('download');
+  });
+  return whiteList;
+}
+
+function handleTagAttr (tag, name, value, isWhiteAttr) {
+  if (name === 'style') {
+    return `${name}="${lib(value, {
+      whiteList: whiteListedCssProperties
+    }).replace(/; /g, ';')}"`;
+  }
+
+  if (tag === 'img' && name === 'src') {
+    if (isBase64(value)) {
+      const data = getBase64Data(value);
+      try {
+        atob(data);
+        return `${name}="${value}"`;
+      } catch (e) {
+        return name;
+      }
+    }
+  }
+}
+
+function handleAttrValue (tag, name, value, cssFilter) {
+  // unescape attribute value firstly
+  value = lib$1.friendlyAttrValue(value);
+
+  if (name === 'href' || name === 'src') {
+    // filter `href` and `src` attribute
+    // only allow the value that starts with `http://` | `https://` | `mailto:` | `data:` | `/` | `#`
+    value = utilTrim(value);
+    if (value === '#') return '#';
+    if (!isWhiteListedHref(value)) {
+      return '';
+    }
+  } else if (name === 'background') {
+    // filter `background` attribute (maybe no use)
+    // `javascript:`
+    REGEXP_DEFAULT_ON_TAG_ATTR_4$1.lastIndex = 0;
+    if (REGEXP_DEFAULT_ON_TAG_ATTR_4$1.test(value)) {
+      return '';
+    }
+  } else if (name === 'style') {
+    // `expression()`
+    REGEXP_DEFAULT_ON_TAG_ATTR_7$1.lastIndex = 0;
+    if (REGEXP_DEFAULT_ON_TAG_ATTR_7$1.test(value)) {
+      return '';
+    }
+    // `url()`
+    REGEXP_DEFAULT_ON_TAG_ATTR_8$1.lastIndex = 0;
+    if (REGEXP_DEFAULT_ON_TAG_ATTR_8$1.test(value)) {
+      REGEXP_DEFAULT_ON_TAG_ATTR_4$1.lastIndex = 0;
+      if (REGEXP_DEFAULT_ON_TAG_ATTR_4$1.test(value)) {
+        return '';
+      }
+    }
+    if (cssFilter !== false) {
+      cssFilter = cssFilter || lib$1.getDefaultCSSWhiteList();
+      value = cssFilter.process(value);
+    }
+  }
+
+  // escape `<>"` before returns
+  value = lib$1.escapeAttrValue(value);
+  return value;
+}
+
+function isWhiteListedHref (value) {
+  const whiteList = ['http://', 'https://', 'mailto:', 'tel:', 'data:', '#', '/'];
+  return whiteList.some(item => value.substr(0, item.length) === item);
+}
+
+// utility trim from xss
+function utilTrim (str) {
+  if (String.prototype.trim) {
+    return str.trim();
+  }
+  return str.replace(/(^\s*)|(\s*$)/g, '');
+}
+
+// RegExp list from xss
+var REGEXP_DEFAULT_ON_TAG_ATTR_4$1 = /((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):/gi;
+var REGEXP_DEFAULT_ON_TAG_ATTR_7$1 = /e\s*x\s*p\s*r\s*e\s*s\s*s\s*i\s*o\s*n\s*\(.*/gi;
+var REGEXP_DEFAULT_ON_TAG_ATTR_8$1 = /u\s*r\s*l\s*\(.*/gi;
+
+const options = {
+  whiteList: modifyWhiteList(),
+  css: false,
+  stripIgnoreTagBody: true,
+  onTagAttr: handleTagAttr,
+  safeAttrValue: handleAttrValue
+};
+const sanitizer = new lib$1.FilterXSS(options);
+
+function sanitize (html) {
+  return sanitizer.process(html);
+}
+
+export default sanitize;