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HTML

              
                #app
    transition(name="carousel-fade" mode="out-in")
      .load-screen(v-if="loading" key="1")
        p Loading MCU Timeline

      .load-screen(v-else-if="!loading && error" key="2")
        p Timeline could not assemble
        
      main.main-screen(v-else key="3" :class="{ 'show-modal' : showModal }")
        carousel(v-if="movies.length" :class="scrollDirection" :options="carouselOptions" :movies="movies" :current="current" @scroll-direction="handleScrollDirection" @set-current="handleCurrentSlide" @trigger-modal="handleModal")

        transition(name="modal")
          modal(v-if="showModal" :id="movies[current].id" @trigger-modal="handleModal")

// Component templates
template#tpl__carousel
  .carousel
    .image__viewport
      transition(name="fade" mode="out-in")
        carousel-image.carousel__image(v-if="index === current" v-for="movie, index in movies" :backdrop="movie.backdrop_path" size="1280" :key="movie.id")

    embla(ref="embla" :options="options")
      carousel-item(v-for="movie in movies" :title="movie.title" :key="movie.id" v-on="$listeners")

    transition(name="fade")
      button.btn.btn--prev(v-if="canScrollPrev()" @click="scrollPrev")
        svg.icon--control(viewBox="0 0 24 24")
          path(d="M20,11V13H8L13.5,18.5L12.08,19.92L4.16,12L12.08,4.08L13.5,5.5L8,11H20Z")

    transition(name="fade")
      button.btn.btn--next(v-if="canScrollNext()" @click="scrollNext")
        svg.icon--control(viewBox="0 0 24 24")
          path(d="M4,11V13H16L10.5,18.5L11.92,19.92L19.84,12L11.92,4.08L10.5,5.5L16,11H4Z")
          
    .timeline
      .dot(v-for="movie, index in movies" :class="{ current : index === current }" @click="scrollTo(index)")
        .dot__image-wrapper
          carousel-image(:backdrop="movie.poster_path" size="154" :key="movie.id")

template#tpl__embla
  .carousel__viewport
    .carousel__container
      slot

template#tpl__carousel-item
  li.carousel__slide
    h2.slide__title {{ title }}
    button.btn.btn--cta(@click="handleModal")
      svg.icon--play(viewBox="0 0 24 24")
        path(d="M12,20C7.59,20 4,16.41 4,12C4,7.59 7.59,4 12,4C16.41,4 20,7.59 20,12C20,16.41 16.41,20 12,20M12,2A10,10 0 0,0 2,12A10,10 0 0,0 12,22A10,10 0 0,0 22,12A10,10 0 0,0 12,2M10,16.5L16,12L10,7.5V16.5Z")
      span Watch trailer

template#tpl__carousel-image
  img(:src="src")
  
template#tpl__modal
  .modal
    .modal__overlay(@click="handleModal")
    .modal__wrapper
      iframe(v-if="src" :src="src" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen)
      button.btn.btn--close(title="Close trailer window" @click="handleModal")
        svg.icon--close(viewBox="0 0 24 24")
          path(d="M19,6.41L17.59,5L12,10.59L6.41,5L5,6.41L10.59,12L5,17.59L6.41,19L12,13.41L17.59,19L19,17.59L13.41,12L19,6.41Z")
              
            
!

CSS

              
                @import url('https://fonts.googleapis.com/css2?family=Oswald:wght@400&family=Playfair+Display:ital@1&display=swap');

:root {
  --font-primary: 'Oswald', sans-serif;
  --font-secondary: 'Playfair Display', serif;
  --ease-out: cubic-bezier(0.33, 1, 0.68, 1);
  --ease-in: cubic-bezier(0.5, 0, 0.75, 0);
  --duration: 500ms;
  --backdrop-offset: 12px;
  --btn-size: calc(0.75rem + 5vmin);
  --btn-cta-font-size: min(max(14px, 3vw), 30px);
  --slide-title-font-size: min(max(16px, 4vw), 60px);
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
  height: -webkit-fill-available;
}

body {
  background-color: black;
  font-family: var(--font-primary);
  overflow: hidden;
}

.load-screen {
  position: absolute;
  top: 50%;
  left: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(white, 0.4);
  text-transform: uppercase;
  text-align: center;
  letter-spacing: 0.025rem;
  font-size: unquote("min(max(16px, 4vw), 60px)");
  transform: translate(-50%, -50%);
  
  p {
    opacity: 0;
    animation: fadein var(--duration) var(--duration) var(--ease-out) forwards;   
  }
  
  @keyframes fadein {
    to { opacity: 1 }
  }
}


// ===============================
// Carousel viewport
// ===============================

.carousel__viewport {  
  --mask-size: 6vw;
  
  position: relative;
  width: 100%;
  height: 100vh;
  z-index: 2;
  overflow: hidden;
  mask-image: linear-gradient(
    to right,
    transparent,
    transparent var(--mask-size),
    black calc(var(--mask-size) * 2),
    black calc(100% - calc(var(--mask-size) * 2)),
    transparent calc(100% - var(--mask-size)),
    transparent
  );
}

.carousel__viewport.is-draggable {
  cursor: move;
  cursor: grab;
}

.carousel__viewport.is-dragging {
  cursor: grabbing;
}

.carousel__container {
  display: flex;
  align-items: center;
  height: 100%;
  height: -webkit-fill-available;
}


// ===============================
// Carousel slide
// ===============================

.carousel__slide {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  padding: 0 8vw;
  text-align: center;
  list-style: none;
  color: white;
  transform: translateY(var(--btn-cta-font-size)) scale(1.0001);
  transition: transform calc(var(--duration) / 2) var(--ease-out);
  
  &.is-selected {
    transform: translateY(0) scale(1.0001);
    transition-duration: calc(var(--duration) / 2);
    transition-delay: calc(var(--duration) * 1.25);
  }
}

.slide__title {
  font-size: var(--slide-title-font-size);
  line-height: 1.2;
  opacity: 0.6;
  text-transform: uppercase;
  transform: scale(0.98);
  transition: 
    opacity calc(var(--duration) * 1.5) var(--ease-out),
    transform var(--duration) var(--ease-out);
  
  .is-selected & {
    opacity: 1;
    transform: scale(1.18);
  }
}


// ===============================
// Image viewport
// ===============================

.image__viewport {
  --mask-size: 40px;
  position: absolute;
  top: 0;
  left: 0;
  overflow: hidden;
  width: 100%;
  height: 100%;
  z-index: 1;
  transform: scale(1.02);
  mask-image: linear-gradient(
    to bottom,
    transparent,
    transparent var(--mask-size),
    black calc(var(--mask-size) * 4),
    black calc(100% - calc(var(--mask-size) * 4)),
    transparent calc(100% - var(--mask-size)),
    transparent
  );
}

.carousel__image {
  position: absolute;
  top: calc(var(--backdrop-offset) / -2);
  left: calc(var(--backdrop-offset) / -2);
  width: calc(100% + var(--backdrop-offset));
  height: calc(100% + var(--backdrop-offset));
  z-index: 1;
  opacity: 0.5;
  object-fit: cover;
}


// ===============================
// Buttons
// ===============================

.btn {
  border: 0;
  padding: 0;
  outline: none;
  cursor: pointer;
  background-color: transparent;
  color: white;
  fill: currentcolor;
  z-index: 3;
  touch-action: manipulation;
}

.btn--cta {
  display: flex;
  align-items: center;
  margin-top: 1rem;
  font-family: var(--font-secondary);
  font-size: var(--btn-cta-font-size);
  font-style: italic;
  letter-spacing: 0.05rem;
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  visibility: hidden;
  transition:
    transform 0s var(--duration) var(--ease-out),
    opacity calc(var(--duration) / 4) var(--ease-out),
    visibility 0s var(--duration);
  
  > * + * {
    margin-left: 0.25rem;
  }
  
  svg {
    margin-top: 0.125em;
    width: 1.25em;
    height: 1.25em;
    fill: currentcolor;
    transition: fill calc(var(--duration) / 4) var(--ease-out);
  }
  
  .is-selected & {
    opacity: 1;
    visibility: visible;
    pointer-events: initial;
    transform: translateY(0);
    transition-duration: calc(var(--duration) / 1.5);
    transition-delay: calc(var(--duration) * 1.5);
  }
}

.btn--prev,
.btn--next {
  position: absolute;
  top: calc(50% - (var(--btn-size) / 2));
}

.btn--prev {
  left: 12px;
}

.btn--next {
  right: 12px;
}

.btn .icon--control {
  width: var(--btn-size);
  height: var(--btn-size);
}

.btn--close {
  position: absolute;
  right: -8px;
  bottom: calc(100% + 1rem);
  width: var(--btn-size);
  height: var(--btn-size);
  opacity: 0;
  transition: opacity calc(var(--duration) / 4) var(--ease-out);
  
  .show-modal & {
    opacity: 1;
    transition-duration: calc(var(--duration) / 2);
  }
}


// ===============================
// Timeline
// ===============================

.timeline {
  --margin: 10vw;
  display: flex;
  justify-content: space-between;
  position: absolute;
  bottom: 4rem;
  margin: 0 var(--margin);
  width: calc(100% - (var(--margin) * 2));
  z-index: 3;
}

.dot {
  --line-size: 6px;
  --line-height: 40px;
  flex: 1 0 auto;
  display: flex;
  justify-content: space-between;
  position: relative;
  border-bottom: var(--line-size) solid white;
  height: var(--line-height);
  cursor: pointer;
  user-select: none;
  
  &::before {
    content: '';
    position: absolute;
    right: 1px;
    bottom: 4px;
    width: 1px;
    height: calc(var(--line-height) / 6);
    background-color: white;
  }
  
  &::after {
    content: '';
    position: absolute;
    top: calc(100% + var(--line-size));
    width: 100%;
    height: var(--line-height);
  }
  
  &:hover ~ .dot {
    opacity: 0.25;
  }
  
  :not(:hover) & {
    &.current:not(:hover) ~ .dot {
      opacity: 0.25;      
    }
  }
}
  
.dot__image-wrapper {
  --wrapper-size: 100px;
  position: absolute;
  bottom: 100%;
  right: calc((var(--wrapper-size) * -1) + (var(--line-size) / 2));
  width: var(--wrapper-size);
  height: auto;
  pointer-events: none;
  opacity: 0;
  transform: translateX(-50%);
  transition: opacity calc(var(--duration) * 2) var(--ease-out);
  
  &::after {
    content: '';
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    margin: 0 auto;
    height: var(--line-height);
    width: var(--line-size);
    pointer-events: none;
    background-color: white;
    transform-origin: 50% 100%;
    opacity: 0;
  }
  
  img {
    width: 100%;
    opacity: 0;
    transition: opacity var(--duration) var(--ease-out),
  }
  
  .dot:hover & {
    opacity: 1;
    pointer-events: initial;
    transition-duration: calc(var(--duration) / 4);
    z-index: 1;
    
    img {
      opacity: 1;
      transition-duration: 0s;
    }
    
    &:after {
      opacity: 1;
    }
  }
}


// ===============================
// Modal
// ===============================

.modal {
  display: flex;
  align-items: center;
  justify-content: center;
  position: fixed;
  top: 0;
  left: 0;
  padding: 4rem 4vw;
  width: 100%;
  height: 100%;
  z-index: 2;
}

.modal__overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.modal__wrapper {
  position: relative;
  width: 100vw;
  max-width: 1000px;
  margin: auto;
  background: black;
  
  &::after {
    content: "";
    display: block;
    padding-bottom: calc(100% / (16 / 9));
  }
  
  iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
  }
}


// ===============================
// Global transitions
// ===============================

.fade-enter-active {
  transition: 
    opacity var(--duration) var(--ease-out),
    transform var(--duration) var(--ease-out);
}

.fade-leave-active {
  transition: 
    opacity calc(var(--duration) / 2) var(--ease-in),
    transform calc(var(--duration) / 2) var(--ease-in);
}

.fade-enter, .fade-leave-to {
  opacity: 0;
}

.fade-enter {
  .scroll-prev & {
    transform: translateX(calc(var(--backdrop-offset) * -1));    
  }
  
  .scroll-next & {
    transform: translateX(var(--backdrop-offset));
  }
}

.fade-leave-to {
  .scroll-prev & {
    transform: translateX(var(--backdrop-offset));
  }
  
  .scroll-next & {
    transform: translateX(calc(var(--backdrop-offset) * -1));
  }
}

.carousel-fade-enter-active {
  transition: opacity calc(var(--duration) * 4) var(--duration) var(--ease-out);
}

.carousel-fade-leave-active {
  transition: opacity var(--duration) calc(var(--duration) * 3) var(--ease-out);
}

.carousel-fade-enter,
.carousel-fade-leave-to {
  opacity: 0;
}


// ===============================
// Modal transitions
// ===============================

.modal-enter-active {
  transition: opacity var(--duration) calc(var(--duration) / 3) var(--ease-out),
    transform var(--duration) calc(var(--duration) / 3) var(--ease-out);
  
  .btn--close {
    opacity: 0;
  }
}

.modal-leave-active {
  transition: 
    opacity calc(var(--duration) / 2) var(--ease-out),
    transform calc(var(--duration) / 2) var(--ease-out);
}

.modal-enter, .modal-leave-to {
  opacity: 0;
  transform: scale(1.04);
}

.carousel__viewport,
.image__viewport,
.timeline,
.btn--prev,
.btn--next {
  transition: 
    opacity var(--duration) calc(var(--duration) / 2) var(--ease-out),
    transform var(--duration) var(--ease-out);
  
  .show-modal & {
    transition-delay: 0s;
    transition-duration: var(--duration);
  }
}

.carousel__viewport {  
  .show-modal & {
    opacity: 0;
    transform: scale(0.9);
  }
}

.image__viewport {  
  .show-modal & {
    opacity: 0.75;
    transform: scale(1.0001);
  }
}

.timeline,
.btn--prev,
.btn--next {
  .show-modal & {
    opacity: 0;
    transform: scale(0.96);
    pointer-events: none;
  }
}

.image__viewport {
  transition: 
    opacity var(--duration) var(--ease-out),
    transform var(--duration) var(--ease-out),
    filter var(--duration) var(--ease-out);
  
  .show-modal & {
    filter: grayscale(100%);
  }
}
              
            
!

JS

              
                Vue.component("embla", {
  props: { options: Object },
  template: "#tpl__embla",
  
  methods: {
    init() {
      this.$embla = EmblaCarousel(this.$el, this.options);
    },
    
    api() {
      return this.$embla;
    }
  },
  
  mounted() {
    this.init();
  },
});

Vue.component("carousel", {
  props: { movies: Object, options: Object, current: Number },
  template: "#tpl__carousel",
  
  methods: {
    setCurrent() {
      this.$emit('set-current', this.$refs.embla.api().selectedScrollSnap());
    },
    
    setScrollDirection() {
      if (this.$refs.embla.api().selectedScrollSnap() > this.$refs.embla.api().previousScrollSnap()) {                
       return this.$emit('scroll-direction', 'scroll-next');
      }
      
      this.$emit('scroll-direction', 'scroll-prev');
    },
    
    scrollTo(target) {
      this.$refs.embla.api().scrollTo(target);
    },
    
    scrollPrev() {
      this.$refs.embla.api().scrollPrev();
    },
    
    scrollNext() {
      this.$refs.embla.api().scrollNext();
    },
    
    canScrollPrev() {
      return this.$refs.embla ? this.$refs.embla.api().canScrollPrev() : false;
    },
    
    canScrollNext() {
      return this.$refs.embla ? this.$refs.embla.api().canScrollNext() : true;
    },
    
    handleUpdate() {
      this.setCurrent();
      this.setScrollDirection();
    },
  },
  
  mounted() {
    this.$refs.embla.api().on('select', this.handleUpdate);
  }
});

Vue.component("carousel-item", {
  props: { title: String },
  template: "#tpl__carousel-item",
  
  methods: {
    handleModal() {
      this.$emit('trigger-modal');
    }
  }
});


Vue.component("carousel-image", {
  props: { backdrop: String, size: String },
  template: "#tpl__carousel-image",
  
  computed: {
    src() {
      return `https://image.tmdb.org/t/p/w${this.size}${this.backdrop}`;
    }
  }
});

Vue.component("modal", {
  props: { id: Number },
  template: "#tpl__modal",
  
  data() {
    return {
      src: null
    }
  },
  
  methods: {
    fetchVideo() {
      fetch(`https://api.themoviedb.org/3/movie/${this.id}/videos?api_key=${userKey}&language=en-US`)
        .then(res => res.json())
        .then(data => {
          setTimeout(() => {
            this.src = `https://www.youtube.com/embed/${data.results[0].key}?autoplay=1&mute=1`;
          }, 400);
        })
        .catch(err => err);
    },
    
    handleModal() {
      this.$emit('trigger-modal');
    }
  },
  
  mounted() {
    this.fetchVideo();
  }
});

const app = new Vue({
  el: "#app",
  
  data: {
    carouselOptions: { speed: 25 },
    current: 0,
    movies: [],
    scrollDirection: null,
    showModal: false,
    loading: true,
    error: false
  },
  
  methods: {
    handleScrollDirection(value) {
      this.scrollDirection = value;
    },
    
    handleCurrentSlide(value) {
      this.current = value;
    },
    
    handleModal() {
      this.showModal = !this.showModal;
    },
    
    fetchMovieList() { 
      this.loading = true;
      fetch(`https://api.themoviedb.org/3/list/142235?api_key=${userKey}&language=en-US`)
        .then(res => res.json())
        .then(data => this.movies = data.items)
        .then(this.loading = false)
        .catch(err => this.error);
    },
  },
  
  mounted() {
    this.fetchMovieList();
  }
});

              
            
!
999px

Console