css/css-content/parsing/content-computed.html

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>CSS Content Module Level 3: getComputedStyle().content</title>
<link rel="author" title="Tim Nguyen" href="https://github.com/nt1m">
<link rel="help" href="https://drafts.csswg.org/css-content-3/#content-property">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/computed-testcommon.js"></script>
</head>
<body>
<!-- Note: we have to make this element 'display:none' so that it doesn't
     trigger actual image loads from remote web servers when we set its
     'content' property to e.g. https://www.example.com/picture.svg via the
     scripted tests below. -->
<div id="target" style="display:none"></div>
<script>
function test_computed_value_combinations(property, specified, computed) {
    test_computed_value(property, specified, computed);
    test_computed_value(property, `${specified} / "alt text"`, computed ? `${computed} / "alt text"` : undefined);
}

test_computed_value_combinations("content", "open-quote");
test_computed_value_combinations("content", "close-quote");
test_computed_value_combinations("content", "no-open-quote");
test_computed_value_combinations("content", "no-close-quote");

test_computed_value_combinations("content", "counter(counter-name)");
test_computed_value_combinations("content", "counter(counter-name, counter-style)");
test_computed_value_combinations("content", "counter(counter-name, dECiMaL)", "counter(counter-name)");
test_computed_value_combinations("content", "counter(counter-name, DECIMAL)", "counter(counter-name)");

test_computed_value_combinations("content", `counters(counter-name, ".")`);
test_computed_value_combinations("content", `counters(counter-name, ".", counter-style)`);
test_computed_value_combinations("content", `counters(counter-name, ".", dECiMaL)`, `counters(counter-name, ".")`);
test_computed_value_combinations("content", `counters(counter-name, ".", DECIMAL)`, `counters(counter-name, ".")`);

test_computed_value_combinations("content", `url("https://www.example.com/picture.svg")`);

test_computed_value_combinations("content", `"hello"`);

test_computed_value_combinations("content", `counter(counter-name) "potato"`);
test_computed_value_combinations("content", `counters(counter-name, ".") "potato"`);
test_computed_value_combinations("content", `"(" counters(counter-name, ".", counter-style) ")"`);
test_computed_value_combinations("content", `open-quote "hello" "world" close-quote`);
test_computed_value_combinations("content", `url("https://www.example.com/picture.svg") "hello"`);
</script>
</body>
</html>