webScroll/v_7_loading_video.html at main · p4css/webScroll · GitHub

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<!DOCTYPE html>
<html lang="zh-TW">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>捲動視頻示例</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            overflow-x: hidden;
        }

        .section {
            display: flex;
            justify-content: center;
            align-items: center;
            font-family: system-ui, -apple-system, sans-serif;
            font-size: 2rem;
            color: white;
        }

        .video-section {
            position: relative;
            height: 100vh;
            background: #000;
        }

        .content-section {
            height: 200vh;
            background: linear-gradient(45deg, #2193b0, #6dd5ed);
            padding: 2rem;
            text-align: center;
        }

        .footer-section {
            height: 100vh;
            background: linear-gradient(45deg, #373B44, #4286f4);
            text-align: center;
        }

        video {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .loading-container {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            text-align: center;
            background: rgba(0, 0, 0, 0.8);
            padding: 20px;
            border-radius: 10px;
            min-width: 200px;
            z-index: 10;
        }

        .progress-bar {
            width: 100%;
            height: 4px;
            background: #333;
            border-radius: 2px;
            margin: 10px 0;
            overflow: hidden;
        }

        .progress-fill {
            height: 100%;
            background: #2193b0;
            width: 0%;
            transition: width 0.3s ease;
        }

        .loading-text {
            color: white;
            font-size: 1rem;
            margin-bottom: 5px;
        }

        .scroll-indicator {
            position: fixed;
            bottom: 20px;
            left: 50%;
            transform: translateX(-50%);
            padding: 10px 20px;
            background: rgba(0, 0, 0, 0.7);
            color: white;
            border-radius: 20px;
            opacity: 0;
            transition: opacity 0.5s;
            z-index: 10;
        }

        .scroll-indicator.visible {
            opacity: 1;
        }

        .play-button {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            padding: 15px 30px;
            background: rgba(0, 0, 0, 0.8);
            color: white;
            border: none;
            border-radius: 25px;
            cursor: pointer;
            font-size: 1.2rem;
            transition: background 0.3s;
            z-index: 10;
        }

        .play-button:hover {
            background: rgba(0, 0, 0, 0.9);
        }
    </style>
</head>
<body>
    <div class="video-section section">
        <div class="loading-container">
            <div class="loading-text">載入中...</div>
            <div class="progress-bar">
                <div class="progress-fill"></div>
            </div>
            <div class="loading-percentage">0%</div>
        </div>
        <video id="mainVideo" muted playsinline>
            <source src="https://web.cw.com.tw/climate-2020/landing/cover.mp4" type="video/mp4">
        </video>
    </div>
    <div class="content-section section">
        <div>
            這是內容區塊<br>
            (高度為 200vh)
        </div>
    </div>
    <div class="footer-section section">
        <div>
            這是頁尾區塊<br>
            (高度為 100vh)
        </div>
    </div>

    <script>
        document.addEventListener('DOMContentLoaded', () => {
            const video = document.getElementById('mainVideo');
            const loadingContainer = document.querySelector('.loading-container');
            const progressFill = document.querySelector('.progress-fill');
            const loadingPercentage = document.querySelector('.loading-percentage');
            let videoLoaded = false;
            let minimumWatchTime = false;
            let scrollEnabled = false;

            const preventDefault = (e) => {
                if (!scrollEnabled) {
                    e.preventDefault();
                }
            };

            document.addEventListener('wheel', preventDefault, { passive: false });
            document.addEventListener('touchmove', preventDefault, { passive: false });

            // 監聽影片載入進度
            video.addEventListener('progress', () => {
                if (video.buffered.length > 0) {
                    const percentage = (video.buffered.end(0) / video.duration) * 100;
                    progressFill.style.width = `${percentage}%`;
                    loadingPercentage.textContent = `${Math.round(percentage)}%`;
                }
            });

            // 當可以播放時
            video.addEventListener('canplay', () => {
                videoLoaded = true;
                loadingContainer.style.display = 'none';
                checkEnableScroll();
            });

            video.addEventListener('timeupdate', () => {
                if (video.currentTime >= 5 && !minimumWatchTime) {
                    minimumWatchTime = true;
                    checkEnableScroll();
                }
            });

            // 處理載入錯誤
            video.addEventListener('error', () => {
                loadingContainer.innerHTML = `
                    <div class="loading-text" style="color: #ff4444;">
                        影片載入失敗，請重新整理頁面
                    </div>
                `;
            });

            const checkEnableScroll = () => {
                if (videoLoaded && minimumWatchTime) {
                    scrollEnabled = true;
                    showScrollIndicator();
                }
            };

            const showScrollIndicator = () => {
                const indicator = document.createElement('div');
                indicator.className = 'scroll-indicator';
                indicator.textContent = '向下捲動以繼續';
                document.body.appendChild(indicator);

                setTimeout(() => {
                    indicator.classList.add('visible');
                }, 100);
            };

            video.play().catch(error => {
                console.log('自動播放失敗:', error);
                createPlayButton();
            });

            function createPlayButton() {
                const playButton = document.createElement('button');
                playButton.textContent = '點擊播放影片';
                playButton.className = 'play-button';

                document.querySelector('.video-section').appendChild(playButton);

                playButton.addEventListener('click', () => {
                    video.play();
                    playButton.remove();
                });
            }
        });
    </script>
</body>
</html>