Add summer animation effects with CSS and JavaScript implementation

Jellyfin.Plugin.Seasonals/Web/summer.css

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+.summer-container {
+    display: block;
+    position: fixed;
+    overflow: hidden;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+    pointer-events: none;
+    z-index: 10;
+}
+
+.summer-bubble {
+    position: fixed;
+    bottom: -50px;
+    z-index: 15;
+    background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.8), rgba(255, 255, 255, 0.1) 60%, rgba(255, 255, 255, 0.05));
+    border: 1px solid rgba(255, 255, 255, 0.3);
+    border-radius: 50%;
+    box-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
+    
+    will-change: transform, bottom;
+    animation-name: summer-rise, summer-wobble;
+    animation-timing-function: linear, ease-in-out;
+    animation-iteration-count: infinite, infinite;
+    animation-duration: 10s, 3s;
+}
+
+.summer-dust {
+    position: fixed;
+    bottom: -10px;
+    z-index: 12;
+    background-color: rgba(255, 223, 186, 0.6);
+    border-radius: 50%;
+    box-shadow: 0 0 5px rgba(255, 223, 186, 0.4);
+    
+    will-change: transform, bottom;
+    animation-name: summer-rise, summer-drift;
+    animation-timing-function: linear, ease-in-out;
+    animation-iteration-count: infinite, infinite;
+    animation-duration: 20s, 5s;
+}
+
+@keyframes summer-rise {
+    0% {
+        bottom: -10%;
+    }
+    100% {
+        bottom: 110%;
+    }
+}
+
+@keyframes summer-wobble {
+    0% {
+        transform: translateX(0);
+    }
+    33% {
+        transform: translateX(15px);
+    }
+    66% {
+        transform: translateX(-15px);
+    }
+    100% {
+        transform: translateX(0);
+    }
+}
+
+@keyframes summer-drift {
+    0% {
+        transform: translateX(0) translateY(0);
+    }
+    50% {
+        transform: translateX(30px) translateY(-20px);
+    }
+    100% {
+        transform: translateX(0) translateY(0);
+    }
+}
+
+

Jellyfin.Plugin.Seasonals/Web/summer.js

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+const config = window.SeasonalsPluginConfig?.Summer || {};
+
+const summer = config.EnableSummer !== undefined ? config.EnableSummer : true; // enable/disable summer
+const summerCount = config.ObjectCount || 30; // default count
+const randomSummer = config.EnableRandomSummer !== undefined ? config.EnableRandomSummer : true; // enable random objects
+const randomSummerMobile = config.EnableRandomSummerMobile !== undefined ? config.EnableRandomSummerMobile : false; // enable random objects on mobile
+const enableDifferentDuration = config.EnableDifferentDuration !== undefined ? config.EnableDifferentDuration : true; // enable different animation duration
+
+let msgPrinted = false;
+
+function toggleSummer() {
+  const summerContainer = document.querySelector('.summer-container');
+  if (!summerContainer) return;
+
+  const videoPlayer = document.querySelector('.videoPlayerContainer');
+  const trailerPlayer = document.querySelector('.youtubePlayerContainer');
+  const isDashboard = document.body.classList.contains('dashboardDocument');
+  const hasUserMenu = document.querySelector('#app-user-menu');
+
+  if (videoPlayer || trailerPlayer || isDashboard || hasUserMenu) {
+    summerContainer.style.display = 'none';
+    if (!msgPrinted) {
+      console.log('Summer hidden');
+      msgPrinted = true;
+    }
+  } else {
+    summerContainer.style.display = 'block';
+    if (msgPrinted) {
+      console.log('Summer visible');
+      msgPrinted = false;
+    }
+  }
+}
+
+const observer = new MutationObserver(toggleSummer);
+observer.observe(document.body, { childList: true, subtree: true, attributes: true });
+
+function createBubble(container, isDust = false) {
+    const bubble = document.createElement('div');
+    
+    if (isDust) {
+        bubble.classList.add('summer-dust');
+    } else {
+        bubble.classList.add('summer-bubble');
+    }
+
+    // Random horizontal position
+    const randomLeft = Math.random() * 100;
+    bubble.style.left = `${randomLeft}%`;
+
+    // Random size
+    if (!isDust) {
+        const size = Math.random() * 20 + 10; // 10-30px bubbles
+        bubble.style.width = `${size}px`;
+        bubble.style.height = `${size}px`;
+    } else {
+        const size = Math.random() * 3 + 1; // 1-4px dust
+        bubble.style.width = `${size}px`;
+        bubble.style.height = `${size}px`;
+    }
+
+    // Animation properties
+    const duration = isDust ? (Math.random() * 20 + 10) : (Math.random() * 10 + 5); // Dust is slower
+    const delay = Math.random() * 10;
+    
+    if (enableDifferentDuration) {
+        bubble.style.animationDuration = `${duration}s`;
+    }
+    bubble.style.animationDelay = `${delay}s`;
+
+    container.appendChild(bubble);
+}
+
+function addRandomSummerObjects(count) {
+    const container = document.querySelector('.summer-container');
+    if (!container) return;
+    
+    // Add bubbles
+    for (let i = 0; i < count; i++) {
+        createBubble(container, false);
+    }
+    
+    // Add some dust particles (more of them, they are subtle)
+    for (let i = 0; i < count * 2; i++) {
+        createBubble(container, true);
+    }
+}
+
+function initSummerObjects() {
+    let container = document.querySelector('.summer-container');
+    if (!container) {
+        container = document.createElement("div");
+        container.className = "summer-container";
+        container.setAttribute("aria-hidden", "true");
+        document.body.appendChild(container);
+    }
+    
+    // Initial bubbles/dust
+    for (let i = 0; i < 10; i++) {
+        const bubble = document.createElement('div');
+        const isDust = Math.random() > 0.5;
+        if (isDust) {
+            bubble.classList.add('summer-dust');
+        } else {
+            bubble.classList.add('summer-bubble');
+        }
+        
+        const randomLeft = Math.random() * 100;
+        bubble.style.left = `${randomLeft}%`;
+        
+        if (!isDust) {
+            const size = Math.random() * 20 + 10;
+            bubble.style.width = `${size}px`;
+            bubble.style.height = `${size}px`;
+        } else {
+            const size = Math.random() * 3 + 1;
+            bubble.style.width = `${size}px`;
+            bubble.style.height = `${size}px`;
+        }
+        
+        const duration = isDust ? (Math.random() * 20 + 10) : (Math.random() * 10 + 5);
+        if (enableDifferentDuration) {
+           bubble.style.animationDuration = `${duration}s`;
+        }
+        
+        bubble.style.animationDelay = `-${Math.random() * 10}s`;
+        container.appendChild(bubble);
+    }
+}
+
+function initializeSummer() {
+    if (!summer) return;
+    initSummerObjects();
+    toggleSummer();
+
+    const screenWidth = window.innerWidth;
+    if (randomSummer && (screenWidth > 768 || randomSummerMobile)) {
+        addRandomSummerObjects(summerCount);
+    }
+}
+
+initializeSummer();