<!DOCTYPE html> <link rel="help" href="https://drafts.csswg.org/cssom-view-1/#extensions-to-the-htmlelement-interface"> <script src=/resources/testharness.js></script> <script src=/resources/testharnessreport.js></script> <style> .container { position: relative; width: 8em; height: 7em; padding: 1em; } </style> <div class="container" style="writing-mode:horizontal-tb;"> offset <br>offset<span class="target"></span><span>ref</span> </div> <div class="container" style="writing-mode:vertical-lr;"> offset <br>offset<span class="target"></span><span>ref</span> </div> <div class="container" style="writing-mode:vertical-rl;"> offset <br>offset<span class="target"></span><span>ref</span> </div> <div class="container" style="writing-mode:horizontal-tb; direction:rtl;"> offset <br>offset<span class="target"></span><span>ref</span> </div> <div class="container" style="writing-mode:vertical-lr; direction:rtl;"> offset <br>offset<span class="target"></span><span>ref</span> </div> <div class="container" style="writing-mode:vertical-rl; direction:rtl;"> offset <br>offset<span class="target"></span><span>ref</span> </div> <script> var i = 0; document.querySelectorAll('span.target').forEach((target) => { var ref = target.nextSibling; test(() => { assert_equals(target.offsetLeft, ref.offsetLeft, 'offsetLeft'); assert_equals(target.offsetTop, ref.offsetTop, 'offsetTop'); }, 'offsetTop/Left of empty inline elements should work as if they were not empty: ' + i); i++; }); </script>