Blitz - WPT: margin-collapse-039.xht

wpt / css / CSS2 / margin-padding-clear / margin-collapse-039.xht

/css/CSS2/margin-padding-clear/margin-collapse-039.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 Test: margin collapsing - clear with child margin</title>

  <!--
  Inspired by
  http://test.csswg.org/suites/css2.1/20110323/html4/c5525-fltmult-000.htm
  -->

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />
  <link rel="reviewer" title="Arron Eicholz" href="arronei(at)gmail.com" /> <!-- 2013-07-30 -->
  <link rel="bookmark" href="http://lists.w3.org/Archives/Public/public-css-testsuite/2012Jan/0022.html" title="[RC6] c5525-fltmult-000 imprecise and failed by several browsers" />
  <link rel="help" href="http://www.w3.org/TR/CSS21/box.html#collapsing-margins" title="8.3.1 Collapsing margins" />
  <link rel="match" href="../reference/ref-filled-green-100px-square.xht" />

  <meta name="assert" content="An element on which 'clear' is set to a value other than 'none' can have its own margin-top collapse with its first inflow block-level child as long as no line boxes, no clearance, no padding and no border separate them." />

  <style type="text/css"><![CDATA[
  body {margin: 8px;}

  p {margin: 1em 0em;}

  div#overlapped-red
  {
  background-color: red;
  height: 100px;
  position: absolute;
  width: 100px;
  z-index: -1;
  }

  div#floated-left
  {
  background-color: green;
  color: green;
  float: left;
  font: 1em/1.25 serif;
  padding: 15px;
  /*

    15px : padding-top
  +
    20px : line box height
  +
    15px : padding-bottom
   =====
    50px

  */
  width: 70px;
  }

  div#cleared-left {clear: left;}

  div#child-of-cleared-left
  {
  background-color: green;
  color: green;
  height: 50px;
  margin-top: 50px;
  width: 100px;
  }

  /*
  The idea is to have div#cleared-left's margin-top collapse
  with div#child-of-cleared-left's margin-top. The margin collapsing
  should occur before calculating clearance.
  */
  ]]></style>

 </head>

 <body>

  <p>Test passes if there is a filled green square and <strong>no red</strong>.</p>

  <div id="overlapped-red"></div>

  <div id="floated-left">flt lef</div>

  <div id="cleared-left">
    <div id="child-of-cleared-left">chld clr</div>
  </div>

 </body>
</html>

/css/CSS2/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>