css文字从下往上滚动

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>CSS文字从下往上滚动</title>
    <style>
        .scroll-text {
            width: 100%;
            height: 50px;
            overflow: hidden;
            position: relative;
        }
        .scroll-text p {
            position: absolute;
            bottom: 0;
            animation: scroll-up 10s linear infinite;
        }
        @keyframes scroll-up {
            0% {
                transform: translateY(100%);
            }
            100% {
                transform: translateY(-100%);
            }
        }
    </style>
</head>
<body>
    <div class="scroll-text">
        <p>这是一段从下往上滚动的文字示例。</p>
    </div>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>CSS文字从下往上滚动</title>
    <style>
        .scroll-text {
            width: 100%;
            height: 50px;
            overflow: hidden;
            position: relative;
        }
        .scroll-text p {
            position: absolute;
            bottom: 0;
        }
    </style>
</head>
<body>
    <div class="scroll-text">
        <p>这是一段从下往上滚动的文字示例。</p>
    </div>
    <script>
        const textElement = document.querySelector('.scroll-text p');
        let scrollSpeed = 1;
        function scrollText() {
            const currentTop = parseInt(textElement.style.bottom, 10);
            textElement.style.bottom = (currentTop - scrollSpeed) + 'px';
            if (currentTop <= -textElement.offsetHeight) {
                textElement.style.bottom = '100%';
            }
        }
        setInterval(scrollText, 50);
    </script>
</body>
</html>