css/css-scoping/css-scoping-shadow-host-functional-rule.html

<!DOCTYPE html>
<html>
<head>
    <title>CSS Scoping Module Level 1 - :host() rules must apply to the shadow host.</title>
    <link rel="author" title="Ryosuke Niwa" href="mailto:rniwa@webkit.org"/>
    <link rel="help" href="http://www.w3.org/TR/css-scoping-1/#host-selector">
    <link rel="match" href="reference/green-box.html"/>
</head>
<body>
    <style>
        host-1, host-2, host-3, host-4, host-5 {
            display: block;
            width: 100px;
            height: 20px;
            background: red;
        }
        host-3, host-4, host-5  {
            background: green;
        }
    </style>
    <p>Test passes if you see a single 100px by 100px green box below.</p>
    <host-1>
        <div>FAIL1</div>
    </host-1>
    <host-2 id="bar" class="foo" name="baz">
        <div>FAIL2</div>
    </host-2>
    <div>
        <host-3>
            FAIL3
        </host-3>
    </div>
    <host-4>
        <div class="child">FAIL4</div>
    </host-4>
    <host-5>
        <div>FAIL5</div>
    </host-5>
    <script>

        try {
            var shadowHost = document.querySelector('host-1');
            shadowRoot = shadowHost.attachShadow({mode: 'open'});
            shadowRoot.innerHTML = '<style> :host(host-1) { background: green !important; } </style>';

            shadowHost = document.querySelector('host-2');
            shadowRoot = shadowHost.attachShadow({mode: 'open'});
            shadowRoot.innerHTML = '<style> :host(host-2.foo#bar[name=baz]) { background: green !important; } </style>';

            shadowHost = document.querySelector('host-3');
            shadowRoot = shadowHost.attachShadow({mode: 'open'});
            shadowRoot.innerHTML = '<style> :host(div host-3) { background: red !important; } </style>';

            shadowHost = document.querySelector('host-4');
            shadowRoot = shadowHost.attachShadow({mode: 'open'});
            shadowRoot.innerHTML = '<style> :host(.child) { background: red !important; } </style>';

            shadowHost = document.querySelector('host-5');
            shadowRoot = shadowHost.attachShadow({mode: 'open'});
            shadowRoot.innerHTML = '<style> :host(host-1) { background: red !important; } </style>';
        } catch (exception) {
            document.body.appendChild(document.createTextNode(exception));
        }

    </script>
</body>
</html>