art-convert/HtmlEscapeMode/SQ_ATTRIBUTE-constant.html">SQ_ATTRIBUTE</a></li>
      <li><a href="dart-convert/HtmlEscapeMode/sqAttribute-constant.html">sqAttribute</a></li>
      <li><a class="deprecated" href="dart-convert/HtmlEscapeMode/UNKNOWN-constant.html">UNKNOWN</a></li>
      <li><a href="dart-convert/HtmlEscapeMode/unknown-constant.html">unknown</a></li>
    </ol>
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  <div class="col-xs-12 col-sm-9 col-md-8 main-content">
    <h1>element constant</h1>

    <sec