wpt/css/css-variables/variable-reference-without-whitespace.html at master · web-platform-tests/wpt · GitHub

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<!DOCTYPE html>
<title>Variable reference without whitespace</title>
<link rel=match href=reference/variable-reference-without-whitespace-ref.html>
<link rel=help href=http://www.w3.org/TR/css-variables-1/#syntax>
<link rel=author title="Simon Sapin" href=http://exyr.org/about/>
<meta rel=assert content="
    A variable reference followed by something without whitespace in between
    must not be interpreted together as a single identifier.
    Custom property values are sequences of tokens, not strings.">
<style>
p {
    counter-reset: -- --a -a;
    --dash:-;
}

#test_1 span::before {
    counter-increment: var(--dash)-;
    content: counter(--);
}
#test_2 span::before {
    counter-increment: var(--dash)-a;
    content: counter(--a);
}
#test_3 span::before {
    counter-increment: var(--dash)a;
    content: counter(-a);
}

#control_1 span::before {
    counter-increment: --;
    content: counter(--);
}
#control_2 span::before {
    counter-increment: --a;
    content: counter(--a);
}
#control_3 span::before {
    counter-increment: -a;
    content: counter(-a);
}
</style>
<p>The next four lines must be identical, containing only zeroes:
<p id="test_1"><span></span> <span></span> <span></span>
<p id="test_2"><span></span> <span></span> <span></span>
<p id="test_3"><span></span> <span></span> <span></span>
<p>0 0 0

<p>The next four lines must be identical, containing increasing integers:
<p id="control_1"><span></span> <span></span> <span></span>
<p id="control_2"><span></span> <span></span> <span></span>
<p id="control_3"><span></span> <span></span> <span></span>
<p>1 2 3