flexbox-min-height-auto-002a.html

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This WPT test may be referenced by the following Test IDs:
- /css/css-flexbox/flexbox-min-height-auto-002a.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<!--

     Any copyright is dedicated to the Public Domain.

     http://creativecommons.org/publicdomain/zero/1.0/

-->

<html>

  <head>

    <meta charset="utf-8">

    <title>CSS Test: Testing min-height:auto</title>

    <link rel="author" title="Daniel Holbert" href="mailto:dholbert@mozilla.com">

    <link rel="help" href="http://www.w3.org/TR/css-flexbox-1/#min-size-auto">

    <link rel="match" href="flexbox-min-height-auto-002-ref.html">

<!--

     This testcase tests the used value of "min-height:auto" (the property's

     initial value) on flex items in a vertical flex container.

     It's supposed to resolve to the smallest of:

      a) The used 'flex-basis' (taken from 'height'), if 'flex-basis' is at its

         initial value.

      b) The computed 'max-height' property

      c) If there's no intrinsic aspect ratio: the item's min-content height.

      d) If there is an intrinsic aspect ratio: the item's height derived from

         the ratio & constraints in the other dimension.

    We measure what the used value is by putting flex items in a small flex

    container, which will shrink its items down to their min-height.

    This test checks for situations where we should resolve the min-height as

    (d) above, with "constraints in the other dimension" being "width".

-->

    <style>

      .flexbox {

        display: flex;

        flex-direction: column;

        height: 1px;  /* No available space; shrink flex items to min-height */

        margin-right: 2px; /* (Just for spacing things out, visually) */

        float: left;

      .flexbox > * {

        /* Flex items have purple border: */

        border: 2px dotted purple;

        /* Flex items have sizing constraint in cross axis: */

        width: 30px;

    </style>

  </head>

  <body>

    <!-- Check for min-height:auto resolving correctly when the smallest

         candidate value is: -->

    <!-- *** (d) (with intrinsic aspect ratio) The height derived from ratio

                 and constraints in the other dimension *** -->

    <!-- First, with a larger candidate 'flex-basis' value (from 'height') -->

    <div class="flexbox">

      <img style="height: 100px" src="support/solidblue.png" alt="blue square">

    </div>

    <!-- ...and now with a larger explicit 'flex-basis' value (which shouldn't

         be considered for 'min-height:auto' anyway) -->

    <div class="flexbox">

      <img style="flex-basis: 100px" src="support/solidblue.png" alt="blue square">

    </div>

    <!-- ...and now with a smaller explicit 'flex-basis' value (which shouldn't

         be considered for 'min-height:auto' anyway) -->

    <div class="flexbox">

      <img style="flex-basis: 10px" src="support/solidblue.png" alt="blue square">

    </div>

  </body>

</html>