<!DOCTYPE html> <!-- Any copyright is dedicated to the Public Domain. http://creativecommons.org/publicdomain/zero/1.0/ --> <html> <head> <title>CSS Test: Testing that strut formation (from visibility:collapse) happens *after* lines have been stretched</title> <link rel="author" title="Daniel Holbert" href="mailto:dholbert@mozilla.com"> <link rel="help" href="http://www.w3.org/TR/css-flexbox-1/#algo-visibility"> <link rel="match" href="flexbox-collapsed-item-horiz-003-ref.html"> <meta charset="utf-8"> <style> .flexContainer { display: flex; flex-wrap: wrap; align-content: stretch; /* Initial value; just here for emphasis */ width: 25px; height: 60px; background: yellow; border: 1px dotted black; float: left; margin: 5px; } .collapsedItem { visibility: collapse; width: 10px; } .shortItem { width: 25px; height: 10px; background: purple; } .tallItem { width: 10px; height: 30px; background: olive; } </style> </head> <body> <!-- In this testcase, the first flex line initially has a cross-size of 10px, and the second flex line has a cross-size of 30px. Both lines are stretched by 10px each (to hit the container's total cross-size, 60px). Then, we handle "visibility:collapse" and convert the collapsed item into a strut with the second line's stretched cross-size (40px), and we restart flex layout. This strut then ends up in the *first* line (since it has 0 main-size), which means both flex lines end up being 40px tall. --> <div class="flexContainer"> <div class="shortItem"></div> <div class="collapsedItem"></div> <div class="tallItem"></div> </div> </body> </html>