<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
 <head>
  <title>Test nth-child selector argument</title>
  <link rel="author" title="Mike Bremford" href="https://bfo.com"/>
  <link rel="help" href="https://www.w3.org/TR/selectors-4/#the-nth-child-pseudo"/>
  <link rel="match" href="../reference/ref-filled-green-100px-square.xht"/>
  <style type="text/css">
    div {
        display: block;
        width: 100px;
        height: 20px;
        background-color: green;
    }
    .container {
        height: 100px;
    }
    .reference {
        background-color: green;
    }
    div:nth-child(1 of) { background-color: red; }
    div:nth-last-child(n of) { background-color: red; }
    div:nth-child(even of) { background-color: red; }
    div:nth-last-child(even of even) { background-color: red; } /* valid just not matching */
    div:nth-child(even .test) { background-color: red; }
    div:nth-last-child(of) { background-color: red; }
    div:nth-child(of ) { background-color: red; }
    div:nth-last-child(of .) { background-color: red; }
    div:nth-child(of .test) { background-color: red; }
    div:nth-last-child(n + of ) { background-color: red; }
    div:nth-child(n - of ) { background-color: red; }
    div:nth-last-child(n + 1of) { background-color: red; }
    div:nth-child(+ of .test) { background-color: red; }
    div:nth-last-child(1 + of .test) { background-color: red; }
    div:nth-child(1 - of .test) { background-color: red; }
    div:nth-last-child(1 n) { background-color: red }
    div:nth-child("1" of div) { background-color: red }
    div:nth-last-child(1 "of" div) { background-color: red }
    div:nth-child(1 of "" div) { background-color: red }
    div:nth-last-child(n-1of div) { background-color: red }
    div:nth-of-type(n of div) { background-color: red } /* gotcha */
    div:nth-last-of-type(n of div) { background-color: red }
  </style>
 </head>
 <body>
  <p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
  <div class="container">
   <div class="test"></div>
   <div class="test"></div>
   <div class="test"></div>
   <div class="test"></div>
   <div class="test"></div>
  </div>
 </body>
</html>
