| <!DOCTYPE html> |
| <link rel="help" href="https://drafts.csswg.org/css-anchor-1/#fallback"> |
| <link rel="author" href="mailto:kojii@chromium.org"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/resources/check-layout-th.js"></script> |
| <script src="support/test-common.js"></script> |
| <style> |
| .cb { |
| position: relative; |
| width: 190px; |
| height: 70px; |
| background: yellow; |
| border-bottom: 1px solid black; |
| } |
| .spacer { |
| width: 1px; |
| height: 20px; |
| } |
| .anchor1 { |
| anchor-name: --a1; |
| margin-left: 45px; |
| width: 100px; |
| height: 30px; |
| background: blue; |
| } |
| .target { |
| position: absolute; |
| position-fallback: --fallback1; |
| width: 40px; |
| height: 15px; |
| margin: 5px; |
| background: orange; |
| } |
| @position-fallback --fallback1 { |
| @try { /* 1: Position to the right of the anchor. */ |
| left: anchor(--a1 right); |
| top: anchor(--a1 top); |
| } |
| @try { /* 2: Position to the left of the anchor. */ |
| right: anchor(--a1 left); |
| top: anchor(--a1 top); |
| } |
| @try { /* 3: Position to the bottom of the anchor. */ |
| left: anchor(--a1 left); |
| top: anchor(--a1 bottom); |
| } |
| @try { /* 4: Position to the top of the anchor. */ |
| left: anchor(--a1 left); |
| bottom: anchor(--a1 top); |
| } |
| @try { /* 5: Position to the left with the narrower width. */ |
| left: anchor(--a1 right); |
| top: anchor(--a1 top); |
| width: 35px; |
| height: 40px; |
| } |
| } |
| </style> |
| <body onload="checkLayoutForAnchorPos('.target')"> |
| <!-- If the `cb` is wider, the 1st `@try` fits. --> |
| <div class="cb" style="width: 195px"> |
| <div class="spacer"></div> |
| <div class="anchor1"></div> |
| <div class="target" |
| data-offset-x=150 data-offset-y=25 |
| data-expected-width=40 data-expected-height=15></div> |
| </div> |
| <!-- If the `margin-left` is wider, the 2nd `@try` fits. --> |
| <div class="cb"> |
| <div class="spacer"></div> |
| <div class="anchor1" style="margin-left: 50px"></div> |
| <div class="target" |
| data-offset-x=5 data-offset-y=25 |
| data-expected-width=40 data-expected-height=15></div> |
| </div> |
| <!-- Without a spacer, the 3rd `@try` fits. --> |
| <div class="cb"> |
| <div class="anchor1"></div> |
| <div class="target" |
| data-offset-x=50 data-offset-y=35 |
| data-expected-width=40 data-expected-height=15></div> |
| </div> |
| <!-- With two spacers, the 4th `@try` fits. --> |
| <div class="cb"> |
| <div class="spacer"></div> |
| <div class="spacer"></div> |
| <div class="anchor1"></div> |
| <div class="target" |
| data-offset-x=50 data-offset-y=20 |
| data-expected-width=40 data-expected-height=15></div> |
| </div> |
| <!-- With a spacer, the last `@try` fits. --> |
| <div class="cb"> |
| <div class="spacer"></div> |
| <div class="anchor1"></div> |
| <div class="target" |
| data-offset-x=150 data-offset-y=25 |
| data-expected-width=35 data-expected-height=40></div> |
| </div> |
| <!-- If the `cb` is narrower, no rules fit. The last rule is used. --> |
| <div class="cb" style="width: 185px"> |
| <div class="spacer"></div> |
| <div class="anchor1"></div> |
| <div class="target" |
| data-offset-x=150 data-offset-y=25 |
| data-expected-width=35 data-expected-height=40></div> |
| </div> |
| </body> |
