css/css-text/bidi/reference/bidi-lines-002-ref.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Text Test: unicode-bidi: plaintext and neutral paragraphs</title>
<link rel="author" title="Florian Rivoal" href="https://florian.rivoal.net">
<style>
section {
    text-align: start;
    font-size: 2em;
    border: solid;
    padding: 0 0.5ch;
    width: 10em;
}
.l { color: blue; }
.r { color: orange; }
</style>

<p>This test passes if within the box below, the two blue “!” are on the left, and the three orange ones are on the right.

<section>
<div dir=rtl><span class=r>!</span></div>
<div dir=ltr><span class=l>!</span> Hello</div>
<div dir=ltr><span class=l>!</span></div>
<div dir=rtl><span class=r>!</span> سلام</div>
<div dir=rtl><span class=r>!</span></div>
</section>