hands on vue - emit와 익숙해지는 연습문제

[목표]

1. emit과 익숙해지기 위한 연습문제를 만들었다. 

검색을 하던 책을 찾아보던 혼자풀던 적어도 10분은 고민해서 풀어보기

 

충족해야할 조건은 다음과 같다.

조건1.

=> App.vue -> FriendsContact.vue 넘긴 데이터 friend가 있다. 

그림에서 보이는 friends 값은 

FriendContact.vue로 넘어간다. 

 

알다시피 FriendContact.vue(자식컴포넌트)에서는

데이터 수정을 할 수 없다. 

 

하지만 자식컴포넌트에서 favorite을 클릭했을 때

부모 컴포넌트의 isFavorite 값을 바뀌게 해보라

 

힌트는 this.$emit... 검색해서 알아오도록

 

소스코드

[App.vue]

<template>
<section>
    <ul>
      <FriendContact
        v-for="friend in friends"
        :key="friend.id"
        :name="friend.name"
        :phone-number="friend.phoneNumber"
        :email-address="friend.emailAddress"
        :isFavorite="friend.isFavorite"
      >
      </FriendContact>
    </ul>
</section>
</template>

<script>
import FriendContact from './components/FriendContact.vue'

export default{ 
  components: { FriendContact },
        data(){
            return{
                friends:[
                    {
                       id: 'manuel',
                       name: 'Manuel Lorenz',
                       phone: '1234 5678 90', 
                       email: 'manuel@localhost.com',
                       isFavorite: true,
                    },
                    {
                       id: 'tom',
                       name: 'Tom Hoon',
                       phone: '9281 238 2910', 
                       email: 'tomhoon@localhost.com',
                       isFavorite: false,
                    },
                    {
                       id: 'Ann',
                       name: 'Ann Kim',
                       phone: '9523 591 2330', 
                       email: 'ann@localhost.com',
                       isFavorite: false,
                    },
                ],
            }
        },
        methods: {

        },
        computed: {

        }
    }
</script>
<style>
/* @import url('https://fonts.googleapis.com/css2?family=Jost&display=swap'); */
* {
  box-sizing: border-box;
}

html {
  font-family: 'Jost', sans-serif;
}

body {
  margin: 0;
}

header {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.26);
  margin: 3rem auto;
  border-radius: 10px;
  padding: 1rem;
  background-color: #58004d;
  color: white;
  text-align: center;
  width: 90%;
  max-width: 40rem;
}

#app ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

#app li {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.26);
  margin: 1rem auto;
  border-radius: 10px;
  padding: 1rem;
  text-align: center;
  width: 90%;
  max-width: 40rem;
}

#app h2 {
  font-size: 2rem;
  border-bottom: 4px solid #ccc;
  color: #58004d;
  margin: 0 0 1rem 0;
}

#app button {
  font: inherit;
  cursor: pointer;
  border: 1px solid #ff0077;
  background-color: #ff0077;
  color: white;
  padding: 0.05rem 1rem;
  box-shadow: 1px 1px 2px rgba(0, 0, 0, 0.26);
}

#app button:hover,
#app button:active {
  background-color: #ec3169;
  border-color: #ec3169;
  box-shadow: 1px 1px 4px rgba(0, 0, 0, 0.26);
}

</style>

[FriendContact.vue]

// FriendContace.vue 소스
<template>
    <li>
        <h2>{{name}} {{isFavorite_child? '(Favorite)' : ''}}</h2>
        <button @click="toggleFavorite">Favorite toggle</button>
        <button @click="toggleDetails">{{detailVisible ? 'Hide' : 'Show'}}Details</button>
        <ul v-if="detailVisible == true">
            <li>
                <strong>NAME: </strong>
                {{name}}
            </li>
            <li>
                <strong>PHONE: </strong>
                {{phoneNumber}}
            </li>
            <li>
                <strong>EMAIL: </strong>
                {{emailAddress}}
            </li>
        </ul>
    </li>
</template>

<script>
export default{
    props: {
        name: {
            type: String,
            requried: true
        },
        phoneNumber:{
            type: String,
            required: true
        },
        emailAddress:{
            type: String,
            requried: true
        },
        isFavorite:{
            type: Boolean,
            required: false,
            defualt: '0',
        },
    },
    data(){
        return{
            detailVisible: false,
            isFavorite_child: this.isFavorite,
        }
    },
    methods: {
        toggleDetails() {
            this.detailVisible = !this.detailVisible;
        },
        toggleFavorite(){
            this.isFavorite_child = !this.isFavorite_child;
            this.$emit('toggle-favorite');
        }
    },
    
}
</script>