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<!doctype html>
<!--
Any copyright is dedicated to the Public Domain.
http://creativecommons.org/publicdomain/zero/1.0/
-->
<title>Examples of column and row rules in a multi-column container</title>
<style>
html,body {
color:black; background-color:white; font:10px/1 monospace;
}
.columns {
column-width: 6ch;
gap: 16px 10px;
column-rule: 4px solid blue;
row-rule: 4px solid purple;
row-rule-align: rule;
inline-size: 30ch;
background: lightgrey;
}
.test1 { row-rule-extent: short; }
.test2 { row-rule-extent: long; }
.test3 { row-rule-extent: start; }
.test4 { row-rule-extent: end; }
.test5 { row-rule-extent: all-short; }
.test6 { row-rule-extent: all-start; }
.test7 { row-rule-extent: all-end; }
.test8 { block-size: calc(32px + 3em); row-rule-extent: all-long; }
.test9 { block-size: calc(32px + 3em); row-rule-extent: long; }
x,a {
display: block;
background: grey;
}
a { column-span: all; }
wrapper {
position: relative;
display: inline-block;
margin-bottom: 2.5em;
}
wrapper::after {
position: absolute;
bottom: -1.5em;
font-size: 10px;
vertical-align: top;
content: attr(test);
white-space: pre;
}
</style>
<wrapper><div class="columns test1"><x>1</x><x>2</x><x>3</x><a>column-span: all</a><x>4</x><x>5</x></div></wrapper>
<wrapper><div class="columns test2"><x>1</x><x>2</x><x>3</x><a>column-span: all</a><x>4</x><x>5</x></div></wrapper><br>
<wrapper><div class="columns test3"><x>1</x><x>2</x><x>3</x><a>column-span: all</a><x>4</x><x>5</x></div></wrapper>
<wrapper><div class="columns test4"><x>1</x><x>2</x><x>3</x><a>column-span: all</a><x>4</x><x>5</x></div></wrapper><br>
<wrapper><div class="columns test5"><x>1</x><x>2</x><x>3</x><a>column-span: all</a><x>4</x><x>5</x></div></wrapper>
<wrapper><div class="columns test6"><x>1</x><x>2</x><x>3</x><a>column-span: all</a><x>4</x><x>5</x></div></wrapper><br>
<wrapper><div class="columns test7"><x>1</x><x>2</x><x>3</x><a>column-span: all</a><x>4</x><x>5</x></div></wrapper>
<wrapper><div class="columns test8"><x>1</x><x>2</x><a>column-span: all</a><x>3</x><x>4</x><x>5</x><x>6</x><x>7</x></div></wrapper><br>
<wrapper><div class="columns test9"><x>1</x><x>2</x><a>column-span: all</a><x>3</x><x>4</x><x>5</x><x>6</x><x>7</x></div></wrapper><br>
<script>
window.onload = function() {
[...document.querySelectorAll('.columns')].forEach(function(elm) {
const cs = window.getComputedStyle(elm);
elm.parentNode.setAttribute("test",
"row-rule-extent: " + cs.rowRuleExtent
);
});
}
</script>
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