Add photo Viewer entering animation

src/routes/[country]/[location]/[photo].svelte

@@ -1,7 +1,8 @@
 <script lang="ts">
     import { browser } from '$app/env'
     import { page } from '$app/stores'
-    import { tick } from 'svelte'
+    import { goto } from '$app/navigation'
+    import { onMount, tick } from 'svelte'
     import { scale } from 'svelte/transition'
     import { quartOut } from 'svelte/easing'
     import { getAssetUrlKey } from '$utils/helpers'
@@ -10,8 +11,10 @@
     import { swipe } from '$utils/interactions/swipe'
     import dayjs from 'dayjs'
     import advancedFormat from 'dayjs/plugin/advancedFormat.js'
+    import anime from 'animejs'
     // Components
     import Metas from '$components/Metas.svelte'
+    import SplitText from '$components/SplitText.svelte'
     import Image from '$components/atoms/Image.svelte'
     import Icon from '$components/atoms/Icon.svelte'
     import IconArrow from '$components/atoms/IconArrow.svelte'
@@ -208,6 +211,72 @@
             throw new Error('Error while loading new photos')
         }
     }
+
+
+    onMount(() => {
+        // Setup animations
+        const timeline = anime.timeline({
+            duration: 1600,
+            easing: 'easeOutQuart',
+        })
+
+        anime.set('.viewer-photo__picture', {
+            opacity: 0,
+        })
+
+        // Photos
+        timeline.add({
+            targets: '.viewer-photo__picture.is-1',
+            opacity: 1,
+            duration: 900,
+        }, 200)
+        timeline.add({
+            targets: '.viewer-photo__picture:not(.is-0):not(.is-1)',
+            opacity: 1,
+            translateX (element: HTMLElement, index: number) {
+                const x = getComputedStyle(element).getPropertyValue('--offset-x').trim()
+                return [`-${x}`, 0]
+            },
+            delay: anime.stagger(55)
+        }, 400)
+
+        // Prev button
+        timeline.add({
+            targets: '.viewer-photo__controls button:first-child',
+            translateX: [-16, 0],
+            opacity: [0, 1],
+        }, 600)
+        // Next button
+        timeline.add({
+            targets: '.viewer-photo__controls button:last-child',
+            translateX: [16, 0],
+            opacity: [0, 1],
+        }, 600)
+
+
+        // Infos
+        timeline.add({
+            targets: '.viewer-photo__info > *',
+            translateY: [24, 0],
+            opacity: [0, 1],
+            delay: anime.stagger(200)
+        }, 400)
+
+
+        anime.set('.viewer-photo__index', { opacity: 0 })
+        // Index
+        timeline.add({
+            targets: '.viewer-photo__index',
+            opacity: 1,
+            duration: 900,
+        }, 600)
+        timeline.add({
+            targets: '.viewer-photo__index .char',
+            translateY: ['100%', 0],
+            delay: anime.stagger(200),
+            duration: 1000,
+        }, 1100)
+    })
 </script>
 
 <svelte:window
@@ -267,9 +336,10 @@
                     </ButtonCircle>
                 </div>
 
-                <span class="viewer-photo__index title-index">
-                    {(currentPhotoIndex < 10) ? '0' : ''}{currentPhotoIndex}
-                </span>
+
+                <div class="viewer-photo__index title-index">
+                    <SplitText text="{(currentPhotoIndex < 10) ? '0' : ''}{currentPhotoIndex}" mode="chars" />
+                </div>
             </div>
 
             <div class="viewer-photo__info">