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HTML Settings

Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              <div id="app" 
     @mousemove="drag"
     @touchmove="drag"
     @mouseup="stopDrag"
     @touchend="stopDrag"
     class="flex items-center justify-center bg-black w-screen h-screen">
  <div class="mobile-container relative overflow-hidden">
    
    <!--  image below   -->
    <img class="absolute h-full z-0"
         :style="prevImageStyle"
         :src="previousImage">
    
    <!--  interactive image   -->
    <img class="absolute h-full z-10"
         @mousedown.prevent="startDrag"
         @touchstart="startDrag" 
         :style="currentImageStyle"
         :src="currentImage">
    
    <!--  image above   -->
    <img class="absolute h-full z-20"
         :style="nextImageStyle"
         :src="nextImage">
    
    <pre class="fixed bottom-0 left-0 p-3 text-white z-50 bg-gray-800 opacity-75 pointer-events-none">
dragging: {{ dragging }}
animating: {{ animating }}
imagesIndexes: [{{previousImageIndex}}] [{{currentImageIndex}}] [{{nextImageIndex}}]
cursorStartX: {{ cursorStartX }}
cursorCurrentX: {{ cursorCurrentX }}
diffX: {{ diffX }}
currentImagePosition: {{currentImagePosition}}
nextImagePosition: {{nextImagePosition}}</pre>
  </div>
  
</div>

            
          
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              .mobile-container {
  width: 320px;
  height: 568px;
}

            
          
!
            
              const images = [
  'https://res.cloudinary.com/ederchrono/image/upload/v1556684546/wotw-013/nature-1.jpg',
  'https://res.cloudinary.com/ederchrono/image/upload/v1556684546/wotw-013/nature-2.jpg',
  'https://res.cloudinary.com/ederchrono/image/upload/v1556684526/wotw-013/nature-3.jpg',
  'https://res.cloudinary.com/ederchrono/image/upload/v1556684544/wotw-013/nature-4.jpg',
  'https://res.cloudinary.com/ederchrono/image/upload/v1556684520/wotw-013/nature-5.jpg',
  'https://res.cloudinary.com/ederchrono/image/upload/v1556684527/wotw-013/nature-6.jpg'
]

const DEVICE_WIDTH = 320
const HALF_WIDTH = DEVICE_WIDTH / 2
const DRAGGING_SPEED = 1.2
const MAX_BLUR = 8

const getCursorX = (event) => {
  if(event.touches && event.touches.length) {
    // touch
    return event.touches[0].pageX        
  }
  
  if(event.pageX && event.pageY) {
    // mouse
    return event.pageX        
  }
  
  return 0
}

const clampPosition = (position) => {
  // constrain image to be between 0 and device width
  return Math.max(Math.min(position, DEVICE_WIDTH), 0)
}

const calculateBlur = (position) => {
  return MAX_BLUR * (1 - (position / DEVICE_WIDTH));
}

new Vue({
  el: '#app',
  data: {
    dragging: false,
    animating: false,
    cursorStartX: 0,
    cursorCurrentX: 0,
    currentImageIndex: 0,
    currentImageAnimatedX: 0,
    nextImageAnimatedX: DEVICE_WIDTH
  },
  methods: {
    startDrag(e) {
      if(this.animating) {
        // avoid dragging when animation is running
        return
      }
      this.dragging = true
      this.cursorStartX = getCursorX(e)
      this.cursorCurrentX = this.cursorStartX
    },
    drag(e) {
      if(!this.dragging) {
        // avoid updating if not dragging
        return
      }
      this.cursorCurrentX = getCursorX(e)
    },
    stopDrag(e) {
      let animationProps = this.createReleaseAnimation()

      this.dragging = false
      this.animating = true
      TweenLite.to(this, 0.2, {
        ...animationProps,
        onComplete: () => {this.animating = false}
      })
    },
    createReleaseAnimation() {
      if(this.swipingLeft) {
        if(this.nextImagePosition > HALF_WIDTH) {
          // next image should be animated back to be offscreen
          this.nextImageAnimatedX = this.nextImagePosition
          return {nextImageAnimatedX: DEVICE_WIDTH}
        } 
        
        // current image "copies" the nextImage position
        this.currentImageAnimatedX = this.nextImagePosition
        // the nextImage is sent offscreen
        this.nextImageAnimatedX = DEVICE_WIDTH
        
        // Change the image index to become the next image in the array
        // images src attribute will update accordingly
        this.currentImageIndex = this.nextImageIndex
        return {currentImageAnimatedX: 0}
      }
      
      // swipe right
      if(this.currentImagePosition < HALF_WIDTH) {
        // current image should be animated back to center position
        this.currentImageAnimatedX = this.currentImagePosition
        return {currentImageAnimatedX: 0}
      }
      
      // the nextImage "copies" the currentImage position
      this.nextImageAnimatedX = this.currentImagePosition
      // the currentImage gets centered to become the prevImage
      this.currentImageAnimatedX = 0
      
      // Change the image index to become the previous image in the array
      this.currentImageIndex = this.previousImageIndex
      return {nextImageAnimatedX: DEVICE_WIDTH}
    }
  },
  computed: {
    diffX () {
      return this.cursorStartX - this.cursorCurrentX
    },
    currentImage () {
      return images[this.currentImageIndex]
    },
    previousImageIndex () {
      return (this.currentImageIndex - 1 + images.length) % images.length
    },
    previousImage () {
      return images[this.previousImageIndex]
    },
    nextImageIndex () {
      return (this.currentImageIndex+1) % images.length
    },
    nextImage () {
      return images[this.nextImageIndex]
    },
    swipingLeft () {
      return this.diffX >= 0
    },
    currentImagePosition () {
      if(this.animating) {
        return this.currentImageAnimatedX
      }
      if(!this.dragging || this.swipingLeft) {
        return 0
      }
      const position = this.diffX * -DRAGGING_SPEED
      return clampPosition(position)
    },
    prevImageStyle () {
      const blur = calculateBlur(this.currentImagePosition)
      
      return {
        'filter': `blur(${blur}px)`
      }
    },
    currentImageStyle () {
      const blur = calculateBlur(this.nextImagePosition)
      
      return {
        'left': `${this.currentImagePosition}px`,
        'filter': `blur(${blur}px)`
      }
    },
    nextImagePosition () {
      if(this.animating) {
        return this.nextImageAnimatedX
      }
      const swipingRight = !this.swipingLeft
      if(!this.dragging || swipingRight) {
        return DEVICE_WIDTH
      }
      
      const position = DEVICE_WIDTH - (this.diffX * DRAGGING_SPEED)
      return clampPosition(position)
    },
    nextImageStyle () {
      return {
        'left': `${this.nextImagePosition}px`
      }
    }
  }
})
            
          
!
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