Solid Buttons


<button type="submit" class="btn btn-primary">Primary</button>
<button type="submit" class="btn btn-success">Success</button>
<button type="submit" class="btn btn-warning">Warning</button>
<button type="submit" class="btn btn-danger">Danger</button>
<button type="submit" class="btn btn-danger" disabled>Disabled</button>

Outline Buttons


<button type="submit" class="btn btn-outline">Regular</button>
<button type="submit" class="btn btn-success-outline">Success-Outline</button>
<button type="submit" class="btn btn-info-outline">Info</button>
<button type="submit" class="btn btn-warning-outline">Warning</button>
<button type="submit" class="btn btn-danger-outline">Danger</button>
<button type="submit" class="btn btn-outline" disabled>Disabled</button>

Flat Buttons


<button type="submit" class="btn btn-link">Regular</button>
<button type="submit" class="btn btn-link" disabled>Disabled</button>
<button type="submit" class="btn btn-sm btn-link">Regular</button>
<button type="submit" class="btn btn-sm btn-link" disabled>Disabled</button>