runtime/bin/vmservice/observatory/lib/src/elements/eval_link.html

<link rel="import" href="../../../../packages/polymer/polymer.html">
<link rel="import" href="instance_ref.html">

<polymer-element name="eval-link">
  <template>
    <style>
      .idle {
        color: #0489c3;
        cursor: pointer;
      }
      .busy {
        color: #aaa;
        cursor: wait;
      }
    </style>

    <template if="{{ busy }}">
      <span class="busy">{{ label }}</span>
    </template>
    <template if="{{ !busy }}">
      <span class="idle"><a on-click="{{ evalNow }}">{{ label }}</a></span>
    </template>
    <template if="{{ result != null }}">
      = <instance-ref ref="{{ result }}"></instance-ref>
    </template>
  </template>
</polymer-element>

<script type="application/dart" src="eval_link.dart"></script>