css/css-flexbox/remove-wrapped-002.html

<!DOCTYPE html>
<meta charset="utf-8">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1902156">
<link rel="help" href="https://drafts.csswg.org/css-flexbox/#flex-items">
<link rel="match" href="/css/reference/ref-filled-green-100px-square.xht">
<link rel="author" href="mailto:dholbert@mozilla.com" title="Daniel Holbert">
<link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Álvarez">
<link rel="author" href="https://mozilla.org" title="Mozilla">
<style>
#flex {
  display: flex;
  width: 100px;
  justify-content: center;
  background: red;
  /* This gap ensures that we'll see some of the red background,
     if there ends up being more than 1 flex item. */
  gap: 90px;
}
#swatch {
  width: 100px;
  height: 100px;
  background: green;
}
</style>
<script>
  function go() {
    /* The fact that we have (and take) a linewrap opportunity
       in "foo bar" is important be able to trigger the bug: */
    let whitespace = document.createTextNode("   ");
    let text = document.createTextNode("foo bar");
    flex.appendChild(whitespace);
    flex.appendChild(text);
    flex.offsetHeight;
    text.remove();
  }
</script>
<body onload="go()">
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div id="flex"><div id="swatch"></div></div>