نشان در Bootstrap ورژن 4

<h1>Example heading <span class="badge badge-secondary">New</span></h1>
<h2>Example heading <span class="badge badge-secondary">New</span></h2>
<h3>Example heading <span class="badge badge-secondary">New</span></h3>
<h4>Example heading <span class="badge badge-secondary">New</span></h4>
<h5>Example heading <span class="badge badge-secondary">New</span></h5>
<h6>Example heading <span class="badge badge-secondary">New</span></h6> 

<span class="badge badge-primary">Primary</span>
<span class="badge badge-secondary">Secondary</span>
<span class="badge badge-success">Success</span>
<span class="badge badge-danger">Danger</span>
<span class="badge badge-warning">Warning</span>
<span class="badge badge-info">Info</span>
<span class="badge badge-light">Light</span>
<span class="badge badge-dark">Dark</span>

<span class="badge badge-pill badge-default">Default</span>
<span class="badge badge-pill badge-primary">Primary</span>
<span class="badge badge-pill badge-success">Succeess</span>
<span class="badge badge-pill badge-info">Info</span>
<span class="badge badge-pill badge-warning">Warning</span>
<span class="badge badge-pill badge-danger">Danger</span>

<button type="button" class="btn btn-primary">
  Messages <span class="badge badge-light">4</span>
</button>