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<!DOCTYPE html>
<html>
<meta charset="utf-8">
<title>CSS Multi-column Layout Test: Test a multi-column container on button works with a column-span:all child</title>
<link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com">
<style>
button {
width: 400px;
}
.inner {
column-count: 3;
column-rule: 6px solid;
}
h3 {
column-span: all;
outline: 1px solid blue;
}
</style>
<button>
<div class="inner">
<div>block1</div><div>block2</div>
<h3>spanner</h3>
<div>block3</div><div>block4</div>
</div>
</button>
</html>