TIL | Vue.js로 간단한 TodoList

✔ App.vue

<template>
  <div id="app">
    <TodoList/>  
  </div>
</template>

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

export default {
  name: 'App',
  components: {
    TodoList
  }
}
</script>

<style>
#app {
  font-family: Avenir, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  margin-top: 60px;
}
</style>

✔ components/TodoList.vue

<template lang="">
    <div>
        <div>
            <input type="text" v-model="inputValue" />
            <button @click="addItem">추가하기</button>
        </div>
        <ul>
            <ListItem v-for="(value, index) in listarray" 
            :key="index" 
            :index="index"
            :text="value === '' ? undefined  : value"
            @delete="catchDeleteItem"/>
        </ul>
    </div>
</template>
<script>
import ListItem from './ListItem.vue';

export default {
    data(){ // 함수이다(객체 안에서 사용할 상태를 리턴하면 사용할 수 있다)
        return {
            inputValue: "",
            listarray: []
        }
    },
    components:{
        ListItem
    },
    methods: {
        addItem(){
            this.listarray.push(this.inputValue);
            this.inputValue = ""
        },
        catchDeleteItem(index){
            this.listarray.splice(index, 1)
        }
    }
}
</script>
<style lang="">
    
</style>  

✔ components/ListItem.vue

<template>
    <li>
        {{text}}
        <button @click="itemDelete">삭제</button>
    </li>
</template>
<script>

export default {
    props:{
        index: {
            type: Number
        },
        text: {
            type: String,
            required: true,
            default: "안녕"
        }
    },
    methods:{
        itemDelete(){
            this.$emit('delete', this.index); // $emit이란? 방출 (delete란 이벤트를 위로 올려준다)
        }
    }
}
</script>
<style lang="">
    
</style>