update img-slider

my-blog/static/css/style.css

@@ -1185,3 +1185,158 @@ article.article-content {
 	}
 }
 
+/* Image Comparison Slider Styles */
+.img-comparison-container {
+    position: relative;
+    width: 100%;
+    max-width: 800px;
+    margin: 20px auto;
+    overflow: hidden;
+    border-radius: 8px;
+    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
+}
+
+.img-comparison-slider {
+    position: relative;
+    width: 100%;
+    height: 400px;
+    overflow: hidden;
+    cursor: pointer;
+}
+
+.img-before,
+.img-after {
+    position: absolute;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+    overflow: hidden;
+}
+
+.img-before {
+    z-index: 2;
+    clip-path: inset(0 50% 0 0);
+}
+
+.img-after {
+    z-index: 1;
+}
+
+.img-before img,
+.img-after img {
+    width: 100%;
+    height: 100%;
+    object-fit: cover;
+    user-select: none;
+    pointer-events: none;
+    position: absolute;
+    top: 0;
+    left: 0;
+}
+
+.slider {
+    position: absolute;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+    background: transparent;
+    outline: none;
+    cursor: pointer;
+    z-index: 4;
+    opacity: 0;
+    -webkit-appearance: none;
+    appearance: none;
+}
+
+.slider::-webkit-slider-thumb {
+    -webkit-appearance: none;
+    appearance: none;
+    width: 0;
+    height: 0;
+}
+
+.slider::-moz-range-thumb {
+    width: 0;
+    height: 0;
+    border: none;
+    background: transparent;
+}
+
+.slider-thumb {
+    position: absolute;
+    top: 0;
+    left: 50%;
+    width: 4px;
+    height: 100%;
+    background: #ffffff;
+    z-index: 3;
+    pointer-events: none;
+    box-shadow: 0 0 8px rgba(0, 0, 0, 0.3);
+    transform: translateX(-50%);
+}
+
+.slider-thumb::before {
+    content: '';
+    position: absolute;
+    top: 50%;
+    left: 50%;
+    width: 40px;
+    height: 40px;
+    background: #ffffff;
+    border: 2px solid var(--theme-color);
+    border-radius: 50%;
+    transform: translate(-50%, -50%);
+    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
+}
+
+.slider-thumb::after {
+    content: '↔';
+    position: absolute;
+    top: 50%;
+    left: 50%;
+    transform: translate(-50%, -50%);
+    color: var(--theme-color);
+    font-size: 16px;
+    font-weight: bold;
+    z-index: 1;
+}
+
+
+/* Responsive design */
+@media (max-width: 768px) {
+    .img-comparison-container {
+        margin: 15px auto;
+        border-radius: 6px;
+    }
+    
+    .img-comparison-slider {
+        height: 250px;
+    }
+    
+    .slider-thumb::before {
+        width: 32px;
+        height: 32px;
+    }
+    
+    .slider-thumb::after {
+        font-size: 14px;
+    }
+}
+
+@media (max-width: 480px) {
+    .img-comparison-slider {
+        height: 200px;
+    }
+    
+    .slider-thumb::before {
+        width: 28px;
+        height: 28px;
+    }
+    
+    .slider-thumb::after {
+        font-size: 12px;
+    }
+}
+

my-blog/static/js/image-comparison.js

@@ -0,0 +1,123 @@
+/**
+ * Image Comparison Slider
+ * UE5-style before/after image comparison component
+ */
+
+class ImageComparison {
+    constructor(container) {
+        this.container = container;
+        this.slider = container.querySelector('.slider');
+        this.beforeImg = container.querySelector('.img-before');
+        this.afterImg = container.querySelector('.img-after');
+        this.sliderThumb = container.querySelector('.slider-thumb');
+        
+        this.isDragging = false;
+        this.containerRect = null;
+        
+        this.init();
+    }
+    
+    init() {
+        this.bindEvents();
+        this.updatePosition(50); // Start at 50%
+    }
+    
+    bindEvents() {
+        // Mouse events
+        this.slider.addEventListener('input', (e) => {
+            this.updatePosition(e.target.value);
+        });
+        
+        this.slider.addEventListener('mousedown', () => {
+            this.isDragging = true;
+            document.body.style.userSelect = 'none';
+        });
+        
+        document.addEventListener('mouseup', () => {
+            if (this.isDragging) {
+                this.isDragging = false;
+                document.body.style.userSelect = '';
+            }
+        });
+        
+        // Touch events for mobile
+        this.slider.addEventListener('touchstart', (e) => {
+            this.isDragging = true;
+            e.preventDefault();
+        });
+        
+        this.slider.addEventListener('touchmove', (e) => {
+            if (this.isDragging) {
+                const touch = e.touches[0];
+                this.containerRect = this.container.getBoundingClientRect();
+                const x = touch.clientX - this.containerRect.left;
+                const percentage = Math.max(0, Math.min(100, (x / this.containerRect.width) * 100));
+                this.slider.value = percentage;
+                this.updatePosition(percentage);
+                e.preventDefault();
+            }
+        });
+        
+        this.slider.addEventListener('touchend', () => {
+            this.isDragging = false;
+        });
+        
+        // Direct click on container
+        this.container.addEventListener('click', (e) => {
+            if (e.target === this.container || e.target.classList.contains('img-comparison-slider')) {
+                this.containerRect = this.container.getBoundingClientRect();
+                const x = e.clientX - this.containerRect.left;
+                const percentage = Math.max(0, Math.min(100, (x / this.containerRect.width) * 100));
+                this.slider.value = percentage;
+                this.updatePosition(percentage);
+            }
+        });
+        
+        // Keyboard support
+        this.slider.addEventListener('keydown', (e) => {
+            let value = parseFloat(this.slider.value);
+            switch (e.key) {
+                case 'ArrowLeft':
+                    value = Math.max(0, value - 1);
+                    break;
+                case 'ArrowRight':
+                    value = Math.min(100, value + 1);
+                    break;
+                case 'Home':
+                    value = 0;
+                    break;
+                case 'End':
+                    value = 100;
+                    break;
+                default:
+                    return;
+            }
+            e.preventDefault();
+            this.slider.value = value;
+            this.updatePosition(value);
+        });
+    }
+    
+    updatePosition(percentage) {
+        const position = parseFloat(percentage);
+        
+        // Update clip-path for before image to show only the left portion
+        this.beforeImg.style.clipPath = `inset(0 ${100 - position}% 0 0)`;
+        
+        // Update slider thumb position
+        this.sliderThumb.style.left = `${position}%`;
+        this.sliderThumb.style.transform = `translateX(-50%)`;
+        
+    }
+}
+
+// Auto-initialize all image comparison components
+document.addEventListener('DOMContentLoaded', function() {
+    const comparisons = document.querySelectorAll('.img-comparison-container');
+    comparisons.forEach(container => {
+        new ImageComparison(container);
+    });
+});
+
+// Export for manual initialization
+window.ImageComparison = ImageComparison;