| <!DOCTYPE html> |
| <script src="../../../resources/testharness.js"></script> |
| <script src="../../../resources/testharnessreport.js"></script> |
| |
| <style> |
| #without_top { |
| top: auto; |
| } |
| |
| #with_top { |
| top: 0px; |
| } |
| |
| #with_bottom { |
| bottom: 0px; |
| } |
| |
| .box { |
| position: sticky; |
| } |
| </style> |
| |
| <div class="box" id="without_top"></div> |
| <div class="box" id="with_top"></div> |
| <div class="box" id="with_bottom"></div> |
| |
| <script> |
| test(() => { |
| var element = document.getElementById('without_top'); |
| assert_equals(getComputedStyle(element).top, 'auto'); |
| }, 'top property should be auto if not specified.'); |
| |
| test(() => { |
| var element = document.getElementById('with_top'); |
| assert_equals(getComputedStyle(element).top, '0px'); |
| }, 'top property should be the actual value if specified.'); |
| |
| test(() => { |
| var element = document.getElementById('with_bottom'); |
| assert_equals(getComputedStyle(element).top, 'auto'); |
| }, 'top property should be auto if only bottom is specified.'); |
| </script> |
