css/css-text/writing-system/writing-system-line-break-002.html

<!doctype html>
<html lang=en>
<meta charset=utf-8>
<title>CSS test: writing system and line breaking</title>
<link rel=author title="Florian Rivoal" href="https://florian.rivoal.net">
<link rel=help href="https://drafts.csswg.org/css-text-3/#languages">
<link rel=help href="https://drafts.csswg.org/css-text-3/#script-tagging">
<link rel=help href="https://drafts.csswg.org/css-text-3/#propdef-line-break">
<link rel=match href="reference/writing-system-line-break-002-ref.html">
<meta name=assert content="breaks before U+FF1F when line-break is loose are allowed
if the writing system is Japanese (which includes Hrkt),
but even when the language not Japanese.">
<style>
div {
  width: 10em;
  line-break: loose;
}
</style>

<p>The test passes if the question mark in the phrase below is alone on the second line.

<div lang=en-Hrkt>ハロー、ハウアーユー？</div>