chromium/ash/webui/sample_system_web_app_ui/resources/trusted/component_playground.html

<!doctype html>
<html class="loading">
<head>
  <meta charset="utf8">
  <title>Component Playground</title>
  <link rel="stylesheet" href="chrome://theme/colors.css?sets=legacy,sys">
  <style>
    html {
      background-color: var(--cros-bg-color);
      color: var(--cros-text-color-primary);
      font-family: Roboto;
    }

    html.loading body {
      display: none;
    }

    #overridden {
      --button-height: 48px;
    }

    .card {
      background-color: var(--cros-sys-app_base_shaded);
      border-radius: 2px;
      height: 50px;
      margin: 10px;
      width: 50px;
    }
  </style>
</head>
<body>
  <div>Normal</div>
  <!-- TODO(ortuno): Change to cros-button once we can use it. -->
  <cros-button label="Primary" primary></cros-button>
  <cros-button label="Secondary"></cros-button>
  <cros-button label="Text" text></cros-button>
  <div>Pill</div>
  <cros-button label="Primary Pill" primary pill></cros-button>
  <cros-button label="Secondary Pill" pill></cros-button>
  <div>Disabled</div>
  <cros-button label="Primary" disabled primary></cros-button>
  <cros-button label="Secondary" disabled></cros-button>
  <cros-button label="Text" disabled text></cros-button>
  <div>Extra Customizations</div>
  <cros-button label="Overridden Styles" id="overridden" primary></cros-button>
  <cros-button label="Hidden Label" primary hide-label></cros-button>
  <div>Vanilla MWC</div>
  <md-text-button label="Button"></md-text-button>

  <div class="card" style="box-shadow: var(--cros-elevation-1-shadow)">+1</div>
  <div class="card" style="box-shadow: var(--cros-elevation-2-shadow)">+2</div>
  <div class="card" style="box-shadow: var(--cros-elevation-3-shadow)">+3</div>
  <div class="card" style="box-shadow: var(--cros-elevation-4-shadow)">+4</div>
  <div class="card" style="box-shadow: var(--cros-elevation-5-shadow)">+5</div>

  <script type="module" src="component_playground.js"></script>
</body>
</html>