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+<!DOCTYPE html>
+<html>
+ <meta charset="utf-8">
+ <title>CSS Multi-column Layout Test: Test a multi-column container with percentage height children</title>
+ <link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com">
+ <link rel="author" title="Mozilla" href="http://www.mozilla.org/">
+ <link rel="help" href="https://drafts.csswg.org/css-multicol-1/#column-span">
+ <link rel="help" href="https://drafts.csswg.org/css-break/#breaking-rules">
+ <link rel="match" href="multicol-span-all-children-height-003-ref.html">
+ <meta name="assert" content="This test checks the percentage height children under multicol container compute the percentage relative to the entire multicol, not just the part after the column-span.">
+
+ <style>
+ article {
+ column-count: 2;
+ width: 400px;
+ height: 200px;
+ background-color: lightgreen;
+ border: 5px solid purple;
+ }
+ div.block1 {
+ background-color: yellow;
+ /* This overflows the column container, so one extra column is created. */
+ height: 300%;
+ }
+ div.spanner {
+ column-span: all;
+ height: 25%;
+ background-color: lightblue;
+ }
+ div.block2 {
+ background-color: yellow;
+ /* No height left for this block. According to the breaking rules, the
+ column container creates 1px column boxes for it. */
+ height: 100%;
+ }
+ </style>
+
+ <article>
+ <div class="block1">block1</div>
+ <div class="spanner">spanner</div>
+ <div class="block2">block2</div>
+ </article>
+</html>