#data
<body><template><yt-icon-button></yt-icon-button><form><paper-input></paper-input></form><style></style></template>
#errors
#document
| <html>
|   <head>
|   <body>
|     <template>
|       content
|         <yt-icon-button>
|         <form>
|           <paper-input>
|         <style>