Polymer Change :host {} dynamically when html5 video is fullscreen -

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is possible dynamically switch :host block inline when user hits fullscreen in html5 video?

when html5 video full screen, there nothing on element :host(element-attribute).

i'm scratching head trying figure out way.

<dom-module id="video-player">   <template>     <style>       :host {         display: block;         width: 100%;         position: relative;         margin-left: 100%;       }        .v-center {         @apply(--layout-horizontal);         @apply(--layout-center-center);         padding-top: 5%;         background-color: black;         overflow-y: scroll;         height: 100%;       }        video {         padding-bottom: 300px;       }        video:-webkit-full-screen {         padding-bottom: 0;       }        video:-webkit-full-screen * {         display: inline;       }      </style>     <iron-media-query query="(max-width: 600px)"        query-matches="{{smallscreen}}"></iron-media-query>     <iron-meta id="meta2" key="foo" value="filler"></iron-meta>      <div class='v-center'  hidden$="{{!smallscreen}}">       <video width="90%" controls src="{{videourl}}"></video>     </div>     <div class='v-center'  hidden$="{{smallscreen}}">       <video width="40%" controls src="{{videourl}}"></video>     </div>   </template> 

<style>   :host {     --host-display: block;     display: var(--host-display);     width: 100%;     position: relative;     margin-left: 100%;   } 
  <video width="40%" controls src="{{videourl}}"        on-fullscreenchange="setdisplay"></video> 
  setdisplay: function () {       var display = document.fullscreenenabled ? 'inline' : 'block';       this.customstyle['--host-display'] = display;       this.updatestyles();   }

see https://developer.mozilla.org/en-us/docs/web/events/fullscreenchange

(not tested)


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