CSS for class-tie

  <script>
    p .c1 { background-color: blue }  # 0,0,1,1
     pre  { background-color: blue }  # 0,0,0,1
     .c2  { background-color: red }  # 0,0,1,0
  </script>
  

Page Content

<p class="c1 c2">This should have a blue background</p>
  

This should have a blue background