grid-item-align-dynamic-pos-001.html

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<!DOCTYPE HTML>

<!--

     Any copyright is dedicated to the Public Domain.

     http://creativecommons.org/publicdomain/zero/1.0/

-->

<html><head>

  <title>CSS Grid Test: dynamic change .left on abs.pos. item w. align-self:center</title>

  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1405319">

  <link rel="help" href="https://drafts.csswg.org/css-align-3/#propdef-align-self">

  <link rel="match" href="grid-item-align-dynamic-pos-001-ref.html">

  <style type="text/css">

html,body {

  color:black; background-color:white; font:16px/1 monospace; padding:0; margin:0;

.grid {

  display: inline-grid;

  position: relative;

  background: lightgrey;

  grid: 50px 50px / 50px 50px;

#item {

  background: grey;

  position: absolute;

  align-self: center;

  left: 10px;

  </style>

</head>

<body>

<div class="grid">

  <div id="item">X</div>

</div>

<script>

  document.body.offsetLeft;

  var items = Array.prototype.slice.call(document.querySelectorAll('#item'));

  items.map(item =>  item.style.left = "20px");

  document.body.offsetLeft;

</script>

</body>

</html>