contain-layout-button-001.tentative.html (1089B)
1 <!DOCTYPE html> 2 <meta charset="utf-8"> 3 <title>CSS Containment Test: Layout containment on button</title> 4 <link rel="author" title="Manuel Rego Casasnovas" href="mailto:rego@igalia.com"> 5 <link rel="help" href="https://drafts.csswg.org/css-contain-1/#containment-layout"> 6 <link rel="help" href="https://drafts.csswg.org/css2/visudet.html#propdef-vertical-align"> 7 <link rel="match" href="reference/contain-layout-button-001-ref.html"> 8 <meta name=assert content="Layout containment does apply to buttons, but in an inline context their baseline is synthesized from their content-box."> 9 <style> 10 button { 11 border: 5px solid green; 12 padding: 0; 13 /* We use a nonzero margin-bottom to be sure we're synthesizing a baseline 14 from the margin-box rather than from the border-box: */ 15 margin-bottom: 2px; 16 contain: layout; 17 color: transparent; 18 width: 0; 19 height: 0; 20 } 21 </style> 22 23 <p>This test passes if it has the same output as the reference. You see the word "before", a 10px green square aligned 2px above the text's baseline, and then the word "after".</p> 24 before<button>b</button>after