| <!DOCTYPE html> |
| <title>Popover invokers form an implicit anchor reference</title> |
| <link rel="author" href="mailto:masonf@chromium.org"> |
| <link rel="help" href="https://www.w3.org/TR/css-anchor-position-1/#implicit"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/resources/testdriver.js"></script> |
| <script src="/resources/testdriver-actions.js"></script> |
| <script src="/resources/testdriver-vendor.js"></script> |
| <script src="/html/semantics/popovers/resources/popover-utils.js"></script> |
| |
| <button id=button popovertarget=popover>Button</button> |
| <div popover id=popover>Popover</div> |
| |
| <style> |
| #button { |
| position:relative; |
| top:100px; |
| left:100px; |
| } |
| #popover { |
| border:1px solid black; |
| inset: auto; |
| margin:0; |
| padding:0; |
| position-area: top left; |
| } |
| body { margin: 0; } |
| </style> |
| |
| <script> |
| promise_test(async (t) => { |
| assert_false(popover.matches(':popover-open')); |
| await clickOn(button); |
| assert_true(popover.matches(':popover-open')); |
| // Popover should be anchored to the button. |
| assert_equals(popover.offsetLeft + popover.offsetWidth, 100); |
| assert_equals(popover.offsetTop + popover.offsetHeight, 100); |
| }, 'Popover invokers form an implicit anchor reference'); |
| </script> |
