|  | <!doctype html> | 
|  | <title>shrink-wrap button</title> | 
|  | <link rel=help href=https://html.spec.whatwg.org/multipage/rendering.html#button-layout> | 
|  | <link rel=help href=https://drafts.csswg.org/css2/visudet.html#shrink-to-fit-float> | 
|  | <script src=/resources/testharness.js></script> | 
|  | <script src=/resources/testharnessreport.js></script> | 
|  | <!-- | 
|  | minimum preferred width 100px | 
|  | preferred width         250px | 
|  | available width         vary | 
|  | --> | 
|  | <style> | 
|  | div.available-width { border: thin dotted red; margin: 1em 0; padding: 1em 0 } | 
|  | button { border: none; margin: 0; padding: 0; background: papayawhip; } | 
|  | button > span.minimum-preferred-width { width: 100px } | 
|  | button > span { width: 50px; display: inline-block; outline: thin dotted blue } | 
|  | </style> | 
|  | <div class="available-width" style="width: 50px"> | 
|  | <button data-expected="100"><span class="minimum-preferred-width">x</span><span>x</span><span>x</span><span>x</span></button> | 
|  | </div> | 
|  |  | 
|  | <div class="available-width" style="width: 200px"> | 
|  | <button data-expected="200"><span class="minimum-preferred-width">x</span><span>x</span><span>x</span><span>x</span></button> | 
|  | </div> | 
|  |  | 
|  | <div class="available-width" style="width: 300px"> | 
|  | <button data-expected="250"><span class="minimum-preferred-width">x</span><span>x</span><span>x</span><span>x</span></button> | 
|  | </div> | 
|  |  | 
|  | <script> | 
|  | const styles = ['display: block', 'display: inline', 'display: inline-block', | 
|  | 'display: list-item', 'display: table', 'display: table-row', | 
|  | 'display: table-cell', 'float: left']; | 
|  | for (const style of styles) { | 
|  | for (const button of [].slice.call(document.querySelectorAll('button'))) { | 
|  | test(() => { | 
|  | button.setAttribute('style', style); | 
|  | assert_equals(button.clientWidth, parseInt(button.dataset.expected, 10)); | 
|  | }, `${style} - available ${button.parentNode.getAttribute('style')}`); | 
|  | } | 
|  | } | 
|  | </script> |