title: How do you define attribute selectors in SASS?
body: <p>In CSS, <a href="http://www.w3.org/TR/CSS2/selector.html#attribute-selectors" rel="noreferrer">you can do this</a>:</p>
  
  <pre><code>input[type=submit] {
    // properties
  }
  </code></pre>
  
  <p>It's a very useful for styling form buttons.</p>
  
  <p>How do you do the same thing in SASS?</p>