javascript - Is it possible for CSS to escape the shadow dom (Polymer)? -


i have drop-down element in polymer. because of z-indexing issues, need pull drop-down part out , make direct child of <body>. unfortunately, can't figure out how , still able style element. solution can come make drop-down portion own polymer tag, seems really... backwards.

in short, have element:

<my-element>     <template>         <style>...</style>          <input>         <div id="dropdown">...</div>     </template> </my-element>

and js in element document.body.appendchild( this.$.dropdown )

i'm trying figure out how stylize drop-down once been moved, polymer/web components' css isolation preventing me doing that.

[edit] note polymer can't handle on-* event handlers attached via dom method due fact can't walk dom tree polymer-element. events need manually attached using this.

i created custom element can inserted element , pull out rules start body , promote them new stylesheet inserted head. there bit of work done, around browsers need polyfilled ::shadow selector won't work. i'll shortly.

<link rel="import" href="../polymer/polymer.html" /> <polymer-element name="promote-body-css">     <script>         'use strict';          ~function(){             var promoted = {};              function promote( node ){                 var nodename = node.nodename;                  if( promoted[ nodename ] ){ return; }                  var promoterules = [];                  [].foreach.call( node.queryselectorall( '::shadow style' ), function( stylesheet ){                     [].foreach.call( stylesheet.sheet.cssrules, function( rule ){                         if( rule.csstext.indexof( 'body ' ) === 0 ){                             promoterules.push( rule.csstext );                         }                     } );                 } );                  if( promoterules.length ){                     var stylesheet = document.createelement( 'style' );                     stylesheet.innerhtml = promoterules.join( '' ) + '/* inserted polymer element ' + nodename + ' */';                      document.getelementsbytagname( 'head' )[0].appendchild( stylesheet );                 }             }              promoted[ nodename ] = 1;              polymer( 'promote-body-css', {                 attached : function( parent ){                     promote( ( parent = this.parentnode ).host || parent );                 }             } );         }();     </script> </polymer-element>

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