flex-container-line-if-empty-vertical-writing-mode.html

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This WPT test may be referenced by the following Test IDs:
- /css/css-flexbox/flex-container-line-if-empty-vertical-writing-mode.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>CSS Flexbox: an empty editable flex container reserves a line's block size in a vertical writing mode</title>

<link rel="help" href="https://drafts.csswg.org/css-flexbox-1/#flex-containers">

<link rel="match" href="flex-container-line-if-empty-vertical-writing-mode-ref.html">

<link rel="stylesheet" type="text/css" href="/fonts/ahem.css">

<style>

#target {

    display: flex;

    writing-mode: vertical-rl;

    height: 100px;

    font: 20px/1 Ahem;

    margin: 0;

    border: 0;

    padding: 0;

    outline: 0;

    background: green;

</style>

<p>Test passes if there is a filled green rectangle below and no red.</p>

<!-- An editable flex container "has a line if empty", so with no in-flow items it must still reserve one

     line along its block axis. In vertical-rl the block axis is horizontal, so the box must be one line

     (20px) wide. -->

<div id="target" contenteditable></div>