| <!DOCTYPE html> |
| <title>CSS Anchor Positioning: position-area positioning inside grid</title> |
| <link rel="help" href="https://drafts.csswg.org/css-anchor-position/#position-area"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <!-- |
| Grid: |
| |
| 100 100 100 100 |
| +--------+--------+--------+--------+ |
| | | | | | |
| 100 | | | | | |
| | | | | | |
| +--------+--------+--------+--------+ |
| | | |XXXXXXXX|XXXXXXXX| |
| 100 | | |XXXXXXXX|XXXXXXXX| |
| | | |XXXXXXXX|XXXXXXXX| |
| +--------+--------+--------+--------+ |
| | | |XXXXXXXX|XXXXXXXX| |
| 100 | | |XXXXXXXX|XXXXXXXX| |
| | | |XXXXXXXX|XXXXXXXX| |
| +--------+--------+--------+--------+ |
| | | | | | |
| 100 | | | | | |
| | | | | | |
| +--------+--------+--------+--------+ |
| |
| |
| Inset regions: |
| |
| 100 150 150 |
| +--------+-------------+------------+ |
| | | | | |
| | | | | |
| 150 | | | | |
| | | | | |
| | | | | |
| +--------+-------------+------------+ |
| | | | | |
| 75 | | | | |
| | | | | |
| +--------+-------------+------------+ |
| | | | | |
| | | | | |
| 175 | | | | |
| | | | | |
| | | | | |
| +--------+-------------+------------+ |
| |
| --> |
| |
| <style> |
| #container { |
| display: grid; |
| grid: 1fr 1fr 1fr 1fr / 1fr 1fr 1fr 1fr; |
| position: relative; |
| width: 400px; |
| height: 400px; |
| outline: 1px solid; |
| } |
| |
| #anchor { |
| position: absolute; |
| left: 100px; |
| top: 150px; |
| width: 150px; |
| height: 75px; |
| anchor-name: --anchor; |
| background: blue; |
| } |
| |
| #anchored { |
| grid-row-start: 2; |
| grid-row-end: span 2; |
| grid-column-start: 3; |
| grid-column-end: auto; |
| position: absolute; |
| align-self: stretch; |
| justify-self: stretch; |
| position-anchor: --anchor; |
| border: solid orange; |
| } |
| </style> |
| |
| <div id="container"> |
| <div id="anchor"></div> |
| <div id="anchored"></div> |
| </div> |
| <script> |
| function test_position_area(position_area, insets, expected_offsets) { |
| anchored.style.positionArea = position_area; |
| for (const [prop, value] of Object.entries(insets)) { |
| anchored.style[prop] = value; |
| } |
| |
| test(() => { |
| assert_equals(anchored.offsetLeft, expected_offsets.left, "Check expected offsetLeft"); |
| assert_equals(anchored.offsetTop, expected_offsets.top, "Check expected offsetTop"); |
| assert_equals(anchored.offsetWidth, expected_offsets.width, "Check expected offsetWidth"); |
| assert_equals(anchored.offsetHeight, expected_offsets.height, "Check expected offsetHeight"); |
| }, "Offsets for position-area: " + position_area + " and insets: " + JSON.stringify(insets)); |
| } |
| |
| test_position_area("span-bottom span-left", {left:"auto", right:"auto", top:"auto", bottom:"auto"}, |
| {left:100, top:150, width:150, height:150}); |
| |
| test_position_area("span-bottom span-left", {left:"10px", right:"10px", top:"10px", bottom:"10px"}, |
| {left:110, top:160, width:130, height:130}); |
| </script> |
