From a6b0c9230d9152947f784d5e5c89f270378c2478 Mon Sep 17 00:00:00 2001
From: krmax44 <hi@krmax44.de>
Date: Mon, 13 Jan 2025 17:00:21 +0100
Subject: [PATCH] =?UTF-8?q?=F0=9F=92=84=20add=20view=20transitions?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/assets/style.css             |  35 +++++-
 src/components/App.vue           |  67 +++++------
 src/components/Questionnaire.vue | 186 +++++++++++++++++--------------
 src/components/Weights.vue       |   4 +-
 src/pages/index.astro            |   4 +-
 5 files changed, 178 insertions(+), 118 deletions(-)

diff --git a/src/assets/style.css b/src/assets/style.css
index 62a184c..6f84aba 100644
--- a/src/assets/style.css
+++ b/src/assets/style.css
@@ -6,7 +6,7 @@ body {
 
 .btn {
   @apply inline-flex items-center px-4 py-2 text-white font-medium;
-  @apply bg-blue-700 hover:bg-blue-800 focus:ring focus:ring-blue-900 outline-none transition;
+  @apply bg-blue-700 hover:bg-blue-800 focus:ring focus:ring-blue-900 outline-none motion-safe:transition;
 }
 
 .btn:disabled {
@@ -40,3 +40,36 @@ body {
   font-style: normal;
   font-display: swap;
 }
+
+@media (prefers-reduced-motion: no-preference) {
+  .slide-enter-active,
+  .slide-back-enter-active {
+    transition:
+      opacity 0.25s,
+      transform 0.25s theme(transitionTimingFunction.out);
+  }
+
+  .slide-leave-active,
+  .slide-back-leave-active {
+    transition:
+      opacity 0.25s,
+      transform 0.25s theme(transitionTimingFunction.in);
+  }
+
+  .slide-leave-to,
+  .slide-enter-from,
+  .slide-back-leave-to,
+  .slide-back-enter-from {
+    opacity: 0;
+  }
+
+  .slide-leave-to,
+  .slide-back-enter-from {
+    transform: translateX(-20%);
+  }
+
+  .slide-enter-from,
+  .slide-back-leave-to {
+    transform: translateX(20%);
+  }
+}
diff --git a/src/components/App.vue b/src/components/App.vue
index 6174741..462c380 100644
--- a/src/components/App.vue
+++ b/src/components/App.vue
@@ -1,5 +1,5 @@
 <script lang="ts" setup>
-import { computed, h, ref } from 'vue'
+import { computed, ref } from 'vue'
 import Questionnaire from './Questionnaire.vue'
 import Results from './Results.vue'
 import Weights from './Weights.vue'
@@ -18,6 +18,8 @@ const props = defineProps<{
   questions: Question[]
 }>()
 
+const transitionName = ref('slide')
+
 const reset = () => {
   answers.value = {}
   weightedTopics.value = []
@@ -35,55 +37,54 @@ const hasPreviousStage = computed(() => currentStage.value !== Stage.Intro)
 const hasNextStage = computed(() => currentStage.value !== Stage.Results)
 
 const nextStage = () => {
+  transitionName.value = 'slide'
   if (hasNextStage.value) currentStage.value += 1
 }
 
 const previousStage = () => {
+  transitionName.value = 'slide-back'
   if (hasPreviousStage.value) currentStage.value -= 1
 }
 </script>
 
 <template>
-  <div v-if="currentStage === Stage.Intro" class="bg-white p-4">
-    <p class="text-xl mb-4">
-      Alle 7 Parteien, die in der letzten Legislaturperiode im Bundestag saßen,
-      haben über Anträge und Gesetzesentwürfe abgestimmt. Jetzt sind Sie an der
-      Reihe: Vergleichen Sie Ihre Standpunkte mit dem Abstimmungsverhalten der
-      Parteien.
-    </p>
-    <p>
-      Der Real-O-Mat ist keine Wahlempfehlung, sondern ein Informationsangebot
-      über Parteien und ihr Abstimmungsverhalten.
-    </p>
-
-    <button class="btn text-4xl mt-4" @click="nextStage">Los geht's!</button>
-  </div>
-
-  <Questionnaire
-    v-else-if="currentStage === Stage.Questionnaire"
-    :questions="questions"
-    @done="nextStage"
-    @previous="previousStage"
-    @reset="confirmReset"
-  />
-
-  <Weights
-    v-else-if="currentStage === Stage.Weights"
-    :questions="questions"
-    @done="nextStage"
-  />
-
-  <Results v-else :questions="questions" />
+  <Transition :name="transitionName" mode="out-in">
+    <div v-if="currentStage === Stage.Intro" class="bg-white p-4">
+      <p class="text-xl mb-4">
+        Alle 7 Parteien, die in der letzten Legislaturperiode im Bundestag
+        saßen, haben über Anträge und Gesetzesentwürfe abgestimmt. Jetzt sind
+        Sie an der Reihe: Vergleichen Sie Ihre Standpunkte mit dem
+        Abstimmungsverhalten der Parteien.
+      </p>
+      <p>
+        Der Real-O-Mat ist keine Wahlempfehlung, sondern ein Informationsangebot
+        über Parteien und ihr Abstimmungsverhalten.
+      </p>
+      <button class="btn text-4xl mt-4" @click="nextStage">Los geht's!</button>
+    </div>
+    <Questionnaire
+      v-else-if="currentStage === Stage.Questionnaire"
+      :questions="questions"
+      @done="nextStage"
+      @previous="previousStage"
+      @reset="confirmReset"
+    />
+    <Weights
+      v-else-if="currentStage === Stage.Weights"
+      :questions="questions"
+      @done="nextStage"
+    />
+    <Results v-else :questions="questions" />
+  </Transition>
 
   <div
+    class="flex mt-4 text-blue-900 motion-safe:transition-all"
     v-if="[Stage.Weights, Stage.Results].includes(currentStage)"
-    class="flex mt-4 text-blue-900"
   >
     <button @click="previousStage" class="btn-text">
       <IconBack class="me-1" />
       Zurück
     </button>
-
     <button @click="confirmReset" class="btn-text ms-auto">
       <IconRestart class="me-1" />
       Neustarten
diff --git a/src/components/Questionnaire.vue b/src/components/Questionnaire.vue
index f0e2155..b5e682f 100644
--- a/src/components/Questionnaire.vue
+++ b/src/components/Questionnaire.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { computed, watch } from 'vue'
+import { computed, ref, watch } from 'vue'
 import type { Question, Answer } from '../content.config.ts'
 import { answers, currentQuestionIndex } from '../store.ts'
 import IconBack from '~icons/material-symbols/arrow-back'
@@ -27,7 +27,11 @@ const currentQuestion = computed(
 )
 const questionsCount = computed(() => props.questions.length)
 
+const transitionName = ref('slide')
+
 const nextQuestion = () => {
+  transitionName.value = 'slide'
+
   if (currentQuestionIndex.value < props.questions.length - 1) {
     currentQuestionIndex.value++
   } else {
@@ -49,8 +53,13 @@ const skipQuestion = () => {
 }
 
 const previousQuestion = () => {
-  if (currentQuestionIndex.value > 0) currentQuestionIndex.value--
-  else emit('previous')
+  transitionName.value = 'slide-back'
+
+  if (currentQuestionIndex.value > 0) {
+    currentQuestionIndex.value--
+  } else {
+    emit('previous')
+  }
 }
 
 const partyAnswerExists = (answer: Answer): boolean =>
@@ -71,88 +80,103 @@ watch(currentQuestion, () => {
 </script>
 
 <template>
-  <div class="pb-4 bg-white">
-    <article v-if="currentQuestion">
-      <div
-        class="bg-blue-200"
-        role="progressbar"
-        aria-label="Fortschritt"
-        aria-valuemin="1"
-        :aria-valuemax="questionsCount"
-        :aria-valuenow="currentQuestionProgress"
-      >
+  <div>
+    <div class="pb-4 bg-white">
+      <article v-if="currentQuestion" class="overflow-hidden">
         <div
-          class="h-2 bg-blue-900 transition-all duration-300 ease-out"
-          :style="{
-            width: `${(currentQuestionProgress / questionsCount) * 100}%`,
-          }"
-        />
-      </div>
-      <div class="min-h-72 md:min-h-42">
-        <div class="px-4 mt-4 text-gray-600 flex">
-          <span> {{ currentQuestion.category }} </span>
-          <div class="max-md:hidden ms-auto text-nowrap" aria-hidden="true">
-            Frage {{ currentQuestionProgress }} / {{ questionsCount }}
-          </div>
+          class="bg-blue-200"
+          role="progressbar"
+          aria-label="Fortschritt"
+          aria-valuemin="1"
+          :aria-valuemax="questionsCount"
+          :aria-valuenow="currentQuestionProgress"
+        >
+          <div
+            class="h-2 bg-blue-900 motion-safe:transition-all duration-300 ease-out"
+            :style="{
+              width: `${(currentQuestionProgress / questionsCount) * 100}%`,
+            }"
+          />
         </div>
-        <div class="px-4">
-          <h2 class="my-8 text-xl md:text-2xl font-medium">
-            {{ currentQuestion.thesis }}
-          </h2>
-        </div>
-      </div>
-      <div class="px-4">
-        <div class="flex flex-col md:flex-row max-md:space-y-3 md:space-x-2">
-          <AnswerButton
-            answer="zu weit"
-            label="nein, geht mir zu weit"
-            :party-answer-exists="partyAnswerExists('zu weit')"
-            @save="saveAnswer"
-            accesskey="1"
-          >
-            <IconLess />
-          </AnswerButton>
-          <AnswerButton
-            answer="richtig"
-            label="ja, finde ich auch"
-            :party-answer-exists="partyAnswerExists('richtig')"
-            @save="saveAnswer"
-            accesskey="2"
+        <div class="min-h-72 md:min-h-42">
+          <Transition
+            class="motion-safe:transition-opacity duration-250 ease-linear"
+            enter-from-class="motion-safe:opacity-0"
+            leave-to-class="motion-safe:opacity-0"
+            mode="out-in"
           >
-            <IconRight />
-          </AnswerButton>
-          <AnswerButton
-            answer="nicht weit genug"
-            label="nein, reicht mir nicht aus"
-            :party-answer-exists="partyAnswerExists('nicht weit genug')"
-            @save="saveAnswer"
-            accesskey="3"
+            <div
+              class="px-4 mt-4 text-gray-600 flex"
+              :key="currentQuestionIndex"
+            >
+              <span> {{ currentQuestion.category }} </span>
+              <div class="max-md:hidden ms-auto text-nowrap" aria-hidden="true">
+                Frage {{ currentQuestionProgress }} / {{ questionsCount }}
+              </div>
+            </div>
+          </Transition>
+          <Transition mode="out-in" :name="transitionName">
+            <div class="px-4" :key="currentQuestionIndex">
+              <h2 class="my-8 text-xl md:text-2xl font-medium">
+                {{ currentQuestion.thesis }}
+              </h2>
+            </div>
+          </Transition>
+        </div>
+        <Transition :name="transitionName" mode="out-in" class="px-4">
+          <div
+            class="flex flex-col md:flex-row max-md:space-y-3 md:space-x-2"
+            :key="currentQuestionIndex"
           >
-            <IconMore />
-          </AnswerButton>
-          <div class="!ms-auto self-center max-md:pt-4">
-            <button @click="skipQuestion" class="btn-text">
-              These überspringen <IconForward class="ms-1" />
-            </button>
+            <AnswerButton
+              answer="zu weit"
+              label="nein, geht mir zu weit"
+              :party-answer-exists="partyAnswerExists('zu weit')"
+              @save="saveAnswer"
+              accesskey="1"
+            >
+              <IconLess />
+            </AnswerButton>
+            <AnswerButton
+              answer="richtig"
+              label="ja, finde ich auch"
+              :party-answer-exists="partyAnswerExists('richtig')"
+              @save="saveAnswer"
+              accesskey="2"
+            >
+              <IconRight />
+            </AnswerButton>
+            <AnswerButton
+              answer="nicht weit genug"
+              label="nein, reicht mir nicht aus"
+              :party-answer-exists="partyAnswerExists('nicht weit genug')"
+              @save="saveAnswer"
+              accesskey="3"
+            >
+              <IconMore />
+            </AnswerButton>
+            <div class="!ms-auto self-center max-md:pt-4">
+              <button @click="skipQuestion" class="btn-text">
+                These überspringen <IconForward class="ms-1" />
+              </button>
+            </div>
           </div>
-        </div>
-      </div>
-    </article>
-  </div>
-
-  <div class="flex mt-4 text-blue-900">
-    <button @click="previousQuestion" class="btn-text">
-      <IconBack class="me-1" />
-      Zurück
-    </button>
-
-    <button
-      @click="emit('reset')"
-      class="btn-text ms-auto"
-      v-if="currentQuestionIndex > 0"
-    >
-      <IconRestart class="me-1" />
-      Neustarten
-    </button>
+        </Transition>
+      </article>
+    </div>
+    <div class="flex mt-4 text-blue-900">
+      <button @click="previousQuestion" class="btn-text">
+        <IconBack class="me-1" />
+        Zurück
+      </button>
+      <button
+        @click="emit('reset')"
+        class="btn-text ms-auto"
+        v-if="currentQuestionIndex > 0"
+      >
+        <IconRestart class="me-1" />
+        Neustarten
+      </button>
+    </div>
   </div>
 </template>
diff --git a/src/components/Weights.vue b/src/components/Weights.vue
index 4c48441..cef5c21 100644
--- a/src/components/Weights.vue
+++ b/src/components/Weights.vue
@@ -56,12 +56,12 @@ const categories = computed(() => {
 input[type='checkbox'] {
   appearance: none;
 
-  @apply appearance-none relative w-8 h-8 border-2 border-gray-500 rounded-full transition-all duration-300 focus:ring focus:ring-blue-600 focus:border-blue-600 outline-transparent;
+  @apply appearance-none relative w-8 h-8 border-2 border-gray-500 rounded-full motion-safe:transition-all motion-safe:duration-300 focus:ring focus:ring-blue-600 focus:border-blue-600 outline-transparent;
 }
 
 input[type='checkbox']::before {
   content: '';
-  @apply flex transition-opacity duration-150 opacity-0 absolute inset-0 text-lg rounded-full items-center justify-center text-white bg-gray-800;
+  @apply flex motion-safe:transition-opacity motion-safe:duration-150 opacity-0 absolute inset-0 text-lg rounded-full items-center justify-center text-white bg-gray-800;
   background-image: url('data:image/svg+xml;base64,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');
   background-size: 100%;
 }
diff --git a/src/pages/index.astro b/src/pages/index.astro
index bc27439..7e115a9 100644
--- a/src/pages/index.astro
+++ b/src/pages/index.astro
@@ -7,5 +7,7 @@ const questions = (await getCollection('questions')).map((q) => q.data)
 ---
 
 <Layout>
-  <App questions={questions} client:only="vue" />
+  <div class="overflow-x-hidden">
+    <App questions={questions} client:only="vue" />
+  </div>
 </Layout>