try-tactic-wm.html (2662B)
1 <!DOCTYPE html> 2 <title>CSS Anchor Positioning: try-tactic under different writing modes</title> 3 <link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/#typedef-position-try-fallbacks-try-tactic"> 4 <script src="/resources/testharness.js"></script> 5 <script src="/resources/testharnessreport.js"></script> 6 <style> 7 @position-try --pf { 8 left:10px; 9 top:20px; 10 } 11 #cb { 12 position: absolute; 13 width: 400px; 14 height: 400px; 15 border: 1px solid black; 16 } 17 #target { 18 position: absolute; 19 left: 99999px; /* force fallback */ 20 width: 30px; 21 height: 40px; 22 background-color: skyblue; 23 } 24 </style> 25 <div id=cb> 26 <div id=target></div> 27 </div> 28 <script> 29 30 function test_try_tactic_wm(try_tactic, writing_mode, direction, expected_offsets) { 31 target.style.positionTryFallbacks = `--pf ${try_tactic}`; 32 cb.style.writingMode = writing_mode; 33 cb.style.direction = direction; 34 test(() => { 35 assert_equals(target.offsetLeft, expected_offsets.left, 'offsetLeft'); 36 assert_equals(target.offsetTop, expected_offsets.top, 'offsetTop'); 37 assert_equals(target.offsetWidth, expected_offsets.width, 'offsetWidth'); 38 assert_equals(target.offsetHeight, expected_offsets.height, 'offsetHeight'); 39 }, `${try_tactic} ${writing_mode} ${direction}`); 40 } 41 42 test_try_tactic_wm('', 'horizontal-tb', 'ltr', {left:10, top:20, width:30, height:40}); 43 44 // Effectively flips left:10px to right:10px: 45 test_try_tactic_wm('flip-inline', 'horizontal-tb', 'ltr', {left:360, top:20, width:30, height:40}); 46 test_try_tactic_wm('flip-x', 'horizontal-tb', 'ltr', {left:360, top:20, width:30, height:40}); 47 48 // Effectively flips top:20px to bottom:20px: 49 test_try_tactic_wm('flip-inline', 'vertical-lr', 'ltr', {left:10, top:340, width:30, height:40}); 50 test_try_tactic_wm('flip-inline', 'sideways-lr', 'ltr', {left:10, top:340, width:30, height:40}); 51 test_try_tactic_wm('flip-y', 'vertical-lr', 'ltr', {left:10, top:340, width:30, height:40}); 52 test_try_tactic_wm('flip-y', 'sideways-lr', 'ltr', {left:10, top:340, width:30, height:40}); 53 54 // Effectively flips left:10px to right:10px: 55 test_try_tactic_wm('flip-block', 'sideways-rl', 'ltr', {left:360, top:20, width:30, height:40}); 56 test_try_tactic_wm('flip-x', 'sideways-rl', 'ltr', {left:360, top:20, width:30, height:40}); 57 58 // Mirror across the [left,top]=>[bottom,right] diagonal: 59 test_try_tactic_wm('flip-start', 'horizontal-tb', 'ltr', {left:20, top:10, width:40, height:30}); 60 61 // Mirror across the [right,top]=>[bottom,left] diagonal: 62 test_try_tactic_wm('flip-start', 'horizontal-tb', 'rtl', {left:340, top:360, width:40, height:30}); 63 64 </script>