67. Moving between Questions

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npm create vue@latest

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• 프로젝트 링크

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이번 강의에서는 퀴즈 애플리케이션의 진행 상태를 추적하고, 사용자가 현재 답변하고 있는 질문만 표시하는 방법을 배웁니다.
Questions Answered라는 데이터 속성을 사용하여 현재 활성화된 질문의 인덱스를 추적합니다.
사용자가 질문에 답변하면, 이 속성의 값이 증가하여 다음 질문으로 넘어갑니다.
Questions 컴포넌트에서는 v-show 지시어를 사용하여 현재 인덱스와 일치하는 질문만 표시하도록 설정합니다.
답변을 클릭할 때마다 selectAnswer 함수가 실행되며, 이 함수는 답변의 정확성을 검사하고, 정답 수를 추적합니다.
또한, 진행 상태 표시줄을 동적으로 업데이트하여 사용자가 몇 개의 질문에 답변했는지 시각적으로 표시합니다.
이러한 과정을 통해 퀴즈 애플리케이션의 기본적인 기능을 구현합니다.

src/main.ts

import './assets/main.css'
import { createApp } from 'vue'
import App from './App.vue'

createApp(App).mount('#app')

src/App.vue

<script setup lang="ts">
  import {ref} from "vue";
  import Questions from "@/components/Questions.vue";
  import Result from "@/components/Result.vue";

  const questionsAnswered = ref(0);

  const totalCorrect = ref(0);

  const questions = ref([
    {
      q: 'What is 2 + 2?',
      answers: [
        {
          text: '4',
          is_correct: true
        },
        {
          text: '3',
          is_correct: false
        },
        {
          text: 'Fish',
          is_correct: false
        },
        {
          text: '5',
          is_correct: false
        }
      ]
    },
    {
      q: 'How many letters are in the word "Banana"?',
      answers: [
        {
          text: '5',
          is_correct: false
        },
        {
          text: '7',
          is_correct: false
        },
        {
          text: '6',
          is_correct: true
        },
        {
          text: '12',
          is_correct: false
        }
      ]
    },
    {
      q: 'Find the missing letter: C_ke',
      answers: [
        {
          text: 'e',
          is_correct: false
        },
        {
          text: 'a',
          is_correct: true
        },
        {
          text: 'i',
          is_correct: false
        }
      ]
    },
  ])

  const results = ref([
    {
      min: 0,
      max: 2,
      title: "Try again!",
      desc: "Do a little more studying and you may succeed!"
    },
    {
      min: 3,
      max: 3,
      title: "Wow, you're a genius!",
      desc: "Studying has definitely paid off for you!"
    }
  ])

  const questionAnswered = (is_correct: boolean) => {
    if (is_correct) {
      totalCorrect.value++;
    }

    questionsAnswered.value++;
  }
</script>

<template>
  <div class="ctr">
    <Questions
        v-if="questionsAnswered < questions.length"
        :questions="questions"
        :questionsAnswered="questionsAnswered"
        @question-answered="questionAnswered"
    />
    <Result v-else />
    <button type="button" class="reset-btn">Reset</button>
  </div>
</template>

src/components/Questions.vue

<script setup lang="ts">
  const props = withDefaults(
      defineProps<{
        questions: Array<{
          q: string
          answers: Array<{
            text: string
            is_correct: boolean
          }>
        }>
        questionsAnswered: number
      }>(),
      {}
  )

  const emits = defineEmits(['question-answered'])

  const selectAnswer = (is_correct: boolean) => {
    emits('question-answered', is_correct)
  }
</script>

<template>
  <div class="questions-ctr">
    <div class="progress">
      <div class="bar" :style="{width: `${questionsAnswered / questions.length * 100}%`}"></div>
      <div class="status">
        {{ questionsAnswered }} out of {{ questions.length }} questions answered
      </div>
    </div>
    <div
        class="single-question"
        v-for="(question, qi) in questions"
        :key="question.q"
        v-show="questionsAnswered === qi"
    >
      <div class="question">{{ question.q }}</div>
      <div class="answers">
        <div
            class="answer"
            v-for="answer in question.answers"
            :key="answer.text"
            @click.prevent="selectAnswer(answer.is_correct)"
        >
          {{ answer.text }}
        </div>
      </div>
    </div>
  </div>
</template>

<style scoped>

</style>

src/components/Result.vue

<script setup lang="ts">

</script>

<template>
  <div class="result">
    <div class="title">You got sample result 1!</div>
    <div class="desc">
      Enter a short description here about the result.
    </div>
  </div>
</template>

<style scoped>

</style>

src/assets/main.css

* {
    box-sizing: border-box;
}
body {
    font-size: 20px;
    font-family: sans-serif;
    padding-top: 20px;
    background: #e6ecf1;
}

.ctr {
    margin: 0 auto;
    max-width: 600px;
    width: 100%;
    box-sizing: border-box;
    position: relative;
}
.questions-ctr {
    position: relative;
    width: 100%;
}
.question {
    width: 100%;
    padding: 20px;
    font-size: 32px;
    font-weight: bold;
    text-align: center;
    background-color: #00ca8c;
    color: #fff;
    box-sizing: border-box;
}
.single-question {
    position: relative;
    width: 100%;
}
.answer {
    border: 1px solid #8e959f;
    padding: 20px;
    font-size: 18px;
    width: 100%;
    background-color: #fff;
    transition: 0.2s linear all;
}
.answer span {
    display: inline-block;
    margin-left: 5px;
    font-size: 0.75em;
    font-style: italic;
}
.progress {
    height: 50px;
    margin-top: 10px;
    background-color: #ddd;
    position: relative;
}
.bar {
    height: 50px;
    background-color: #ff6372;
    transition: all 0.3s linear;
}
.status {
    position: absolute;
    top: 15px;
    left: 0;
    text-align: center;
    color: #fff;
    width: 100%;
}
.answer:not(.is-answered) {
    cursor: pointer;
}
.answer:not(.is-answered):hover {
    background-color: #8ce200;
    border-color: #8ce200;
    color: #fff;
}

.title {
    width: 100%;
    padding: 20px;
    font-size: 32px;
    font-weight: bold;
    text-align: center;
    background-color: #12cbc4;
    color: #fff;
    box-sizing: border-box;
}
.desc {
    border: 1px solid #8e959f;
    padding: 20px;
    font-size: 18px;
    width: 100%;
    background-color: #fff;
    transition: 0.4s linear all;
    text-align: center;
}
.fade-enter-from {
    opacity: 0;
}
.fade-enter-active {
    transition: all 0.3s linear;
}
.fade-leave-active {
    transition: all 0.3s linear;
    opacity: 0;
    position: absolute;
}
.fade-leave-to {
    opacity: 0;
}

.reset-btn {
    background-color: #ff6372;
    border: 0;
    font-size: 22px;
    color: #fff;
    padding: 10px 25px;
    margin: 10px auto;
    display: block;
}

.result{
    width: 100%;
}


.reset-btn:active, .reset-btn:focus, .reset-btn:hover{
    border: 0;
    outline: 0;
}