File: shaping-join-001.html

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<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Text level 3 Test: zwj and text-shaping</title>
<link rel="author" title="Florian Rivoal" href="https://florian.rivoal.net/">
<link rel="help" href="https://drafts.csswg.org/css-text-3/#text-encoding">
<link rel="help" href="https://www.unicode.org/versions/Unicode11.0.0/ch23.pdf">
<link rel="help" href="https://www.unicode.org/versions/Unicode11.0.0/ch09.pdf">
<link rel="help" href="https://www.w3.org/TR/alreq/#h_joining_enforcement">
<link rel="match" href="reference/shaping-join-001-ref.html">
<meta name="assert" content="Arabic characters next to a ZERO WIDTH JOINER character must take their correct positional form.">
<style>
  table {
    font-size: 3em;
    border-spacing: 0 3px;
  }
  td {
    padding: 0 0.5ch;
    line-height: 1;
    border: 1px solid;
  }
  @font-face {
    font-family: 'csstest_noto';
    src: url('/fonts/noto/NotoNaskhArabic-regular.woff2') format('woff2');
  }
  table {
    font-family: 'csstest_noto';
  }
</style>

<p>Test passes if both halves of each of the pairs below are identical:

<table dir=rtl>
<tr><!-- alef, final form as it doesn't have a medial form -->
  <td>&zwj;&#x0627;&zwj;
  <td>&#xFE8E;
<tr><!-- alef, final form -->
  <td>&zwj;&#x0627;
  <td>&#xFE8E;
<tr><!-- beh, initial form -->
  <td>&#x0628;&zwj;
  <td>&#xFE91;
<tr><!-- beh, medial form -->
  <td>&zwj;&#x0628;&zwj;
  <td>&#xFE92;
<tr><!-- beh, final form -->
  <td>&zwj;&#x0628;
  <td>&#xFE90;
</table>