title: What does it mean when a css property starts with a dash?
body: <p>I just downloaded a css file from <a href="http://daneden.me/animate/" rel="nofollow noreferrer">this website</a> and it contains properties such as <code>-webkit-transform</code> and <code>-moz-transform</code>. What does the dash mean and under what circumstances is it required?</p>
  <p>For the nity grity does the phrase &quot;vendor prefix&quot; refer to the - or the content between the - and - (exuding the - and -) or the content between the - and - (including the - themselves)?</p>
  <p>In other words does vender prefix refer to the dash itself or only the content between the dashes or the dashes with the content between them?</p>