| <!DOCTYPE html> | |
| <meta charset="UTF-8"> | |
| <title>CSS Positioned Layout Test: an element with 'position: sticky' creates a stacking context</title> | |
| <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/"> | |
| <link rel="match" href="../../reference/ref-filled-green-100px-square.xht"> | |
| <link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos"> | |
| <meta name="assert" content="This test checks that an element with 'position: sticky' creates a stacking context. In this test, the first 2 divs have the same 'auto' z-index value but since div#sticky is last in document tree order, then it must overlap div#overlapped-red. The final div#overlap-bottom-half-of-sticky exists to make sure that the div#sticky is squeezed, is 'sandwiched' between the other 2."> | |
| <style> | |
| div | |
| { | |
| height: 100px; | |
| width: 100px; | |
| } | |
| div#overlapped-red | |
| { | |
| background-color: red; | |
| position: absolute; | |
| } | |
| div#sticky | |
| { | |
| background: linear-gradient(to bottom, green 51%, red 49%); | |
| position: sticky; | |
| } | |
| div#overlap-bottom-half-of-sticky | |
| { | |
| background-color: green; | |
| bottom: 50px; | |
| height: 50px; | |
| position: relative; | |
| } | |
| </style> | |
| <p>Test passes if there is a filled green square and <strong>no red</strong>. | |
| <div id="overlapped-red"></div> | |
| <div id="sticky"></div> | |
| <div id="overlap-bottom-half-of-sticky"></div> |