ionic-framework/demos/button/main.html

<ion-toolbar>
  <ion-title>Button</ion-title>
</ion-toolbar>

<ion-content text-center>

  <h4>Colors</h4>

  <button>Default</button>

  <button secondary>Secondary</button>

  <button danger>Danger</button>

  <button light>Light</button>

  <button dark>Dark</button>

  <h4>Shapes</h4>

  <button full>Full Button</button>

  <button block>Block Button</button>

  <button round>Round Button</button>

  <button fab style="position: relative;">FAB</button>

  <h4>Outlines</h4>

  <button secondary full outline>Outline + Full</button>

  <button secondary block outline>Outline + Block</button>

  <button secondary round outline>Outline + Round</button>

  <button secondary fab outline style="position: relative;">FAB</button>

  <h4>Icons</h4>

  <button dark>
    <ion-icon name="star"></ion-icon>
    Left Icon
  </button>

  <button dark>
    Right Icon
    <ion-icon name="star"></ion-icon>
  </button>

  <button dark>
    <ion-icon name="star"></ion-icon>
  </button>

  <h4>Sizes</h4>

  <button light large>Large</button>

  <button light>Default</button>

  <button light small>Small</button>

</ion-content>