wpt/css/css-conditional/at-supports-043.html at 6013998d51498bea785fbf3d79ae10f06bb9c84e · web-platform-tests/wpt · GitHub

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<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">

        <title>CSS Conditional Test: Disjunction token `or` should not immediately precede its following opening paren.</title>

        <link rel="author" title="Fabien Basmaison" href="https://arkhi.org/">
        <link rel="help" href="https://www.w3.org/TR/css3-conditional/#at-supports">
        <link rel="match" href="at-supports-001-ref.html">

        <meta name="flags" content="invalid">
        <meta name="assert" content="This tests that the `or` token requires at least one whitespace on its right hand. A string followed immediately by an opening paren is reserved for the functional notation syntax.">

        <style>
            div {
                background-color: green;
                height: 100px;
                width: 100px;
            }

            @supports ( ( background-color: red ) or( background-color: green ) ) {
                div { background-color: red; }
            }
        </style>
    </head>

    <body>
        <p>Test passes if there is a <strong>filled green square</strong> and <strong>no red</strong>.</p>
        <div></div>
    </body>
</html>