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<!DOCTYPE html>
<link rel="author" title="David Grogan" href="mailto:dgrogan@chromium.org">
<link rel="help" href="https://drafts.csswg.org/css-flexbox/#intrinsic-sizes">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>
<meta name="assert"
content="min-content width is calculated correctly in a variety of scenarios with multiple flex items" />
<style>
.zero-width {
width: 0px;
height: 100px;
margin-bottom: 20px;
}
.floating-flexbox {
display: flex;
outline: 5px solid blue;
height: 100px;
float: left;
}
.floating-flexbox>div:nth-child(1) {
background: yellow;
}
.floating-flexbox>div:nth-child(2) {
background: orange;
}
.floating-flexbox>div:nth-child(3) {
background: lightblue;
}
.floating-flexbox>div>div {
width: 100px;
}
</style>
<body onload="checkLayout('.floating-flexbox')">
<div id="log"></div>
<div class="zero-width">
<div class="floating-flexbox" data-expected-width="200">
<!-- min contribution: 100 -->
<!-- desired fraction: -0.5 -->
<!-- chosen fraction <=0 and desired fraction <=0 and item can shrink, so it contributes its min-content contribution -->
<div style="flex: 1 1 200px; width:50px; min-width:0px;">
<div></div>
</div>
<!-- chosen fraction <=0 and desired fraction <=0 and item can shrink, so it contributes its min-content contribution -->
<div style="flex: 1 1 400px; width:50px;">
<div></div>
</div>
</div>
</div>
<div class="zero-width">
<div class="floating-flexbox" data-expected-width="200">
<!-- min contribution: 100 -->
<!-- min contribution - flex basis: -100 -->
<!-- desired fraction: -0.5 -->
<!-- chosen fraction <=0 and desired fraction <=0 and item can shrink, so it contributes its min-content contribution -->
<div style="flex: 1 1 200px; width:50px;">
<div></div>
</div>
<!-- min contribution: 100 -->
<!-- min contribution - flex basis: -300 -->
<!-- desired fraction: -300/(2*400) = -0.375 -->
<!-- chosen fraction <=0 and desired fraction <=0 and item can shrink, so it contributes its min-content contribution -->
<div style="flex: 1 2 400px; width:50px;">
<div></div>
</div>
</div>
</div>
<!-- This is same as above except for min-width auto is no longer in
effect. EdgeHTML renders it differently than the above. -->
<div class="zero-width">
<div class="floating-flexbox" data-expected-width="200">
<div style="flex: 1 1 200px; width:50px; min-width: 0px;">
<div></div>
</div>
<div style="flex: 1 2 400px; width:50px; min-width: 0px;">
<div></div>
</div>
</div>
</div>
<div class="zero-width">
<!-- first item contributes 200px. second item contributes 100px -->
<div class="floating-flexbox" data-expected-width="300">
<!-- min contribution: 100 -->
<!-- desired fraction: -inf -->
<!-- chosen fraction <= 0 and item can't shrink, so contribute flex basis -->
<div style="flex: 1 0 200px; width:50px;">
<div></div>
</div>
<!-- min contribution: 100 -->
<!-- desired fraction: -0.75 -->
<!-- chosen fraction <= 0 and item CAN shrink, so contribute min contribution -->
<div style="flex: 1 1 400px; width:50px;">
<div></div>
</div>
</div>
</div>
<div class="zero-width">
<div class="floating-flexbox" data-expected-width="200">
<!-- min contribution: 200 -->
<!-- min contribution - flex basis: 150 -->
<!-- desired fraction: 0 (because flex grow factor is 0) -->
<!-- chosen fraction <= 0 so contribute flex basis 50px -->
<!-- except flex basis is outside of used min/max, so contribute clamped flex basis = 100px -->
<div style="flex: 0 0 50px; width: 200px;">
<div></div>
</div>
<!-- identical to above -->
<div style="flex: 0 0 50px; width: 200px;">
<div></div>
</div>
</div>
</div>
<div class="zero-width">
<!-- 200 + 400 = 600 -->
<div class="floating-flexbox" data-expected-width="600">
<!-- min contribution: 200 -->
<!-- desired fraction: 150px -->
<!-- 50 + 1*150 = 200 -->
<div style="flex: 1 0 50px; width: 200px;">
<div></div>
</div>
<!-- min contribution: 200 -->
<!-- desired fraction: 100px -->
<!-- 100 + 2*150 = 400 -->
<div style="flex: 2 0 100px; width: 200px;">
<div></div>
</div>
</div>
</div>
<div class="zero-width">
<!-- chosen fraction: 50px -->
<div class="floating-flexbox" data-expected-width="400">
<!-- min contribution: 100 -->
<!-- desired fraction: -0.5 -->
<!-- final contribution = flex base size + product = 200px + 50px*0 = 200px -->
<div style="flex: 0 1 200px; width: 50px;">
<div></div>
</div>
<!-- min contribution: 200 -->
<!-- desired fraction: (200px - 100px) / 2 = 50px -->
<!-- final contribution = flex base size + product = 100px + 50px*2 = 200px -->
<div style="flex: 2 0 100px; width: 200px;">
<div></div>
</div>
</div>
</div>
<div class="zero-width">
<!-- chosen fraction: 0 -->
<div class="floating-flexbox" data-expected-width="600">
<!-- min contribution: 250 -->
<!-- wants to grow, but can't -->
<!-- desired fraction: 0 -->
<!-- final contribution: 100 -->
<div style="flex: 0 1 100px; width: 250px;"></div>
<!-- min contribution: 100 -->
<!-- wants to shrink, but can't -->
<!-- desired fraction: -inf -->
<!-- final contribution: 200 -->
<div style="flex: 1 0 200px; width: 100px;"></div>
<!-- min contribution: -->
<!-- doesn't have to change --->
<!-- desired fraction: 0 -->
<!-- final contribution: 300 -->
<div style="flex: 1 1 300px; width: 300px;"></div>
</div>
</div>
<div class="zero-width">
<!-- chosen fraction: 0 -->
<div class="floating-flexbox" data-expected-width="700">
<!-- min contribution: 100 -->
<!-- wants to shrink, but can't -->
<!-- desired fraction: -inf -->
<!-- final contribution: 200 -->
<!-- In legacy and V2, this item gets 0 width. -->
<div style="flex: 0 10 300px; width: 200px;"></div>
<!-- min contribution: -->
<!-- doesn't have to change --->
<!-- desired fraction: 0 -->
<!-- final contribution: 300 -->
<!-- In legacy and V2, this item gets all the width. -->
<div style="flex: 0 1 1000px; width: 500px;">
</div>
</div>
</div>
</body>
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