<!DOCTYPE html>

<html>
<head>
    <style>
        div {
            position: absolute;
            font-size: 80px;
            color: gray;
            width: 200px;
            left: 0px;
        }

        .test-stroke {
            text-shadow: 100px 0 0 rgba(0, 0, 0, 0.5);
            -webkit-text-stroke: 25px red;

            /* Clip used to isolate a part of the shadow */
            -webkit-clip-path: inset(30px 75px 30px 115px);
        }
    </style>
</head>
<body>

<div class="test-stroke" style="paint-order: fill; top: 0px">&#x25fc;</div>
<div class="test-stroke" style="paint-order: fill markers; top: 100px">&#x25fc;</div>
<div class="test-stroke" style="paint-order: stroke; top: 200px">&#x25fc;</div>
<div class="test-stroke" style="paint-order: stroke markers; top: 300px">&#x25fc;</div>
<div class="test-stroke" style="paint-order: markers; top: 400px">&#x25fc;</div>
<div class="test-stroke" style="paint-order: markers stroke; top: 500px">&#x25fc;</div>

</body>
</html>