refactor(staggered-fade-and-slide): use Vue native staggered transition

packages/_vue3-migration-test/src/components/animations/test-staggered-fade-and-slide.vue

@@ -1,11 +1,67 @@
 <template>
+  <h1>Static content:</h1>
   <StaggeredFadeAndSlide tag="ul" :stagger="50">
     <li key="1">Element to animate</li>
     <li key="2">Element to animate</li>
     <li key="3">Element to animate</li>
   </StaggeredFadeAndSlide>
+  <br />
+  <h1>Animation as prop</h1>
+  <BaseSuggestions :suggestions="suggestions" :animation="StaggeredFadeAndSlide" :stagger="50">
+    <template #default="{ suggestion }">
+      <span>{{ suggestion.query }}</span>
+    </template>
+  </BaseSuggestions>
+  <br />
+
+  <h1>Dinamic content:</h1>
+  <button @click="insert">Insert at random index</button>
+  <button @click="reset">Reset</button>
+
+  <StaggeredFadeAndSlide tag="ul" :stagger="50">
+    <li v-for="item in items" :key="item" class="item">
+      {{ item }}
+      <button @click="remove(item)">x</button>
+    </li>
+  </StaggeredFadeAndSlide>
 </template>
 
 <script setup lang="ts">
+  import { ref } from 'vue';
   import StaggeredFadeAndSlide from '../../../../x-components/src/components/animations/staggered-fade-and-slide.vue';
+  import BaseSuggestions from '../../../../x-components/src/components/suggestions/base-suggestions.vue';
+  import { getQuerySuggestionsStub } from '../../../../x-components/src/__stubs__';
+
+  const suggestions = getQuerySuggestionsStub('chip', 5);
+  const getInitialItems = () => [1, 2, 3, 4, 5];
+  const items = ref(getInitialItems());
+  let id = items.value.length + 1;
+
+  /**
+   * Insert a new item at a random index.
+   */
+  function insert() {
+    const i = Math.round(Math.random() * items.value.length);
+    items.value.splice(i, 0, id++);
+  }
+
+  /**
+   * Reset the list of items.
+   */
+  function reset() {
+    items.value = getInitialItems();
+    id = items.value.length + 1;
+  }
+
+  /**
+   * Remove an item from the list.
+   *
+   * @param item - The item to remove.
+   */
+  function remove(item: any) {
+    const i = items.value.indexOf(item);
+    if (i > -1) {
+      items.value.splice(i, 1);
+    }
+  }
 </script>

packages/_vue3-migration-test/src/x-modules/test-elements-list.vue

@@ -4,7 +4,7 @@
       <PromotedsList>
         <BannersList>
           <NextQueriesList>
-            <BaseGrid>
+            <BaseGrid :animation="StaggeredFadeAndSlide">
               <template #result="{ item: result }">
                 {{ result.id }}
               </template>
@@ -36,4 +36,5 @@
   import BaseGrid from '../../../x-components/src/components/base-grid.vue';
   import LocationProvider from '../../../x-components/src/components/location-provider.vue';
   import NextQueriesList from '../../../x-components/src/x-modules/next-queries/components/next-queries-list.vue';
+  import StaggeredFadeAndSlide from '../../../x-components/src/components/animations/staggered-fade-and-slide.vue';
 </script>

packages/x-components/src/components/animations/staggered-fade-and-slide.vue

@@ -1,19 +1,19 @@
 <template>
-  <StaggeringTransitionGroup
+  <TransitionGroup
     v-on="$listeners"
+    @enter="enter"
+    @after-enter="afterEnter"
     v-bind="$attrs"
-    class="x-staggered-fade-and-slide"
-    :name="name"
     :appear="appear"
+    :name="name"
+    :tag="tag"
   >
-    <!-- @slot (Required) Transition-group content -->
     <slot />
-  </StaggeringTransitionGroup>
+  </TransitionGroup>
 </template>
 
 <script lang="ts">
-  import { defineComponent } from 'vue';
-  import StaggeringTransitionGroup from './staggering-transition-group.vue';
+  import { defineComponent, ref } from 'vue';
   import { useDisableAnimation } from './use-disable-animation';
 
   /**
@@ -24,7 +24,6 @@
    */
   export default defineComponent({
     name: 'StaggeredFadeAndSlide',
-    components: { StaggeringTransitionGroup },
     inheritAttrs: false,
     props: {
       /**
@@ -33,45 +32,115 @@
       appear: {
         type: Boolean,
         default: true
+      },
+      /**
+       * The tag of the node to render to the DOM.
+       */
+      tag: {
+        type: String,
+        default: 'div'
+      },
+      /**
+       * The time in ms to stagger each item.
+       */
+      stagger: {
+        type: Number,
+        default: 25
       }
     },
-    setup: function () {
+    setup(props) {
+      /**
+       * The duration of the transition in ms.
+       */
+      const transitionDuration = 250;
+      /**
+       * The counter to keep track of the staggered delay.
+       */
+      const staggerCounter = ref(0);
+      /**
+       * The counter to keep track of the animations.
+       */
+      const animationList = ref<HTMLElement[]>([]);
+      /**
+       * The name of the animation.
+       */
+      const animationName = ref('x-staggered-fade-and-slide');
       /**
        * The name of the animation.
        */
-      const animationName = 'x-staggered-fade-and-slide-';
+      const { name } = useDisableAnimation(animationName.value);
+
+      /**
+       * Calculate the delay for the next element.
+       *
+       * @returns The delay in ms.
+       */
+      function getNextTransitionDelay(): number {
+        return staggerCounter.value++ * props.stagger;
+      }
 
-      const { name } = useDisableAnimation(animationName);
+      /**
+       * The enter transition.
+       *
+       * @param el
+       * @param done
+       */
+      function enter(el: HTMLElement, done: () => void) {
+        animationList.value.push(el);
+        const delay = getNextTransitionDelay();
+        el.style.transitionDelay = `${delay}ms`;
+        setTimeout(() => {
+          el.style.transitionDelay = '0ms';
+          done();
+        }, transitionDuration + delay);
+      }
+
+      /**
+       * The after enter transition.
+       *
+       * @param el
+       */
+      function afterEnter(el: HTMLElement) {
+        animationList.value = animationList.value.filter(item => item !== el);
+        if (animationList.value.length === 0) {
+          staggerCounter.value = 0;
+        }
+      }
 
-      return { name };
+      return {
+        name,
+        enter,
+        afterEnter
+      };
     }
   });
 </script>
 
-<style lang="scss" scoped>
+<style lang="scss">
   $transition-duration: 0.25s;
+  /* 1. Declare transitions */
+  .x-staggered-fade-and-slide-enter-active,
+  .x-staggered-fade-and-slide-leave-active {
+    transition: $transition-duration ease-out;
+    transition-property: opacity, transform;
+  }
 
-  .x-staggered-fade-and-slide {
-    z-index: 0;
-
-    &::v-deep .x-staggered-fade-and-slide {
-      &--enter-active,
-      &--leave-active {
-        transition: $transition-duration ease-out;
-        transition-property: opacity, transform;
-      }
+  .x-staggered-fade-and-slide-move {
+    transition: transform $transition-duration ease-out;
+  }
 
-      &--move {
-        transition: transform $transition-duration ease-out;
-      }
+  /* 2. declare enter from and leave to state */
+  .x-staggered-fade-and-slide-enter,
+  .x-staggered-fade-and-slide-enter-from,
+  .x-staggered-fade-and-slide-leave-to {
+    opacity: 0;
+    transform: translate3d(0, 50%, 0);
+  }
 
-      &--enter,
-      &--leave-to {
-        transform: translate3d(0, 50%, 0);
-        opacity: 0;
-        z-index: -1;
-      }
-    }
+  /* 3. ensure leaving items are taken out of layout flow so that moving
+      animations can be calculated correctly. */
+  .x-staggered-fade-and-slide-leave-active {
+    position: absolute;
   }
 </style>
 

packages/x-components/src/router.ts

@@ -9,6 +9,11 @@ const routes: RouteConfig[] = [
     name: 'Home',
     component: () => import('./views/home/Home.vue')
   },
+  {
+    path: '/animations',
+    name: 'Animations Test',
+    component: () => import('./views/home/animations-test.vue')
+  },
   {
     path: '/products/:id',
     name: 'Product page',