wotw013-block29.js

// inside methods
    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}
    }