column-count-with-rules.html | Explore in Territory

<!DOCTYPE html>
<style>
    body {
        -webkit-writing-mode: vertical-lr;
    }
    .columns {
        -webkit-column-count: 3;
        -webkit-column-rule: 2px solid black;
        -webkit-column-gap: 20px;
        column-count: 3;
        column-rule: 2px solid black;
        column-gap: 20px;
        column-fill: auto;
        height: 340px;
        width: 100px;
        padding: 20px;
        border: 10px solid maroon;
        margin-right: 1em;
        line-height: 20px;
    }
</style>
<div class="columns">
    Column text.<br>
    Column text.<br>
    Column text.<br>
    Column text.<br>
    Column text.<br>
    Column text.<br>
    Column text.<br>
    Column text.<br>
    Column text.<br>
    Column text.<br>
    Column text.<br>
    Column text.<br>
</div>

<div class="columns" style="direction:rtl;">
    Column text.<br>
    Column text.<br>
    Column text.<br>
    Column text.<br>
    Column text.<br>
    Column text.<br>
    Column text.<br>
    Column text.<br>
    Column text.<br>
    Column text.<br>
    Column text.<br>
    Column text.<br>
</div>

chromium/third_party/blink/web_tests/fast/multicol/vertical-lr/column-count-with-rules.html