Blitz - WPT: position-try-tree-scoped-pseudo.html

wpt / css / css-anchor-position / position-try-tree-scoped-pseudo.html

/css/css-anchor-position/position-try-tree-scoped-pseudo.html

<!DOCTYPE html>
<link rel="author" title="David Shin" href="mailto:dshin@mozilla.com">
<link rel="help" href="https://drafts.csswg.org/css-anchor-1/#fallback-rule">
<link rel="help" href="https://drafts.csswg.org/css-shadow/#shadow-names">
<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
<style>
#host {
  position: relative;
}

.foo {
  width: 100px;
  height: 100px;
  background: red;
}

.foo::after {
  display: block;
  width: 100px;
  height: 100px;
  content: "";
  background: green;
}
</style>
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div id="host">
  <template shadowrootmode="open">
    <style>
      @position-try --host-slot-part {
        left: 0px;
      }
      ::slotted(.foo)::after {
        position: absolute;
        left: 999999px;
        position-try-fallbacks: --host-slot-part;
      }
    </style>
    <div id="part" part="part"></div>
    <slot></slot>
  </template>
  <div class=foo></div>
</div>

/css/reference/ref-filled-green-100px-square.xht

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
 <head>
  <title>CSS Reftest Reference</title>
  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />
  <style type="text/css"><![CDATA[
  div
  {
  background-color: green;
  height: 100px;
  width: 100px;
  }
  ]]></style>
 </head>
 <body>
  <p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
  <div></div>
 </body>
</html>