 100%;
            height: 100%;
          }
        </style>
    </head>
    <body>
    <h1>Viewport: Scroll Event</h1>
    <h4>
        Test Description: This test checks that a scroll event is fired against
        the window.visualViewport object when the viewport is scrolled.
    </h4>
    <h2 style="color: red">THIS IS A MANUAL TEST</h2>
    <p id="skip">
        <button id="skipbtn" onclick="skipManualTest();">Skip Test</button>
    </p>
    <h4>Instruction</h4>
    <p id="instruction"></p>
    <butt