Vue 實現穿梭框功能的詳細代碼

.transfer{
    display: flex;
    justify-content: center;
    align-items: center;
}
.transfer>.list {
    width: 200px;
    height: 300px;
    border: 1px solid #000;
    list-style: none;
}
.content{
    font-size: 30px;
    margin: 0 20px;
}
.list>li{
    padding: 5px;
    box-sizing: border-box;
}

<div class="transfer" >
    <!-- 左框 -->
    <ul class="list left">
        <template v-for="(item, index) in info">
            <li :key="index">
                <input type="checkbox" :id=`checkbox${item.id}` name="checkbox" :checked="item.select" @click="item.select=!item.select"  />
                <label :for=`checkbox${item.id}` >{{ item.name }} </label>
            </li>
        </template>
    </ul>

    <!-- 添加/刪除 -->
    <div class="content">
        <p class="push" @click='push' >>>></p>
        <p class="del"  @click='del' ><<<</p>
    </div>

    <!-- 右框 -->
    <ul class="list right">
        <template v-for="(item, index) in new_info">
            <li :key="index" >
                <input type="checkbox" :id=`newcheckbox${item.id}` name="newcheckbox" :checked="item.select" @click="item.select=!item.select"  />
                <label :for=`newcheckbox${item.id}`>{{ item.name }} </label>
            </li>
        </template>
    </ul>
</div>

data(){
    return{
        // 原數據，左框數據
        info:[
            {id:'1',name:'小明'},
            {id:'2',name:'小紅'},
            {id:'3',name:'小雞'},
            {id:'4',name:'哈哈哈哈'},
            {id:'5',name:'啊啊啊啊'},
            {id:'6',name:'dddd'},
            {id:'7',name:'qwert'},
        ],
        new_info: [],// 新數據，右框數據
    }
},
methods:{// 添加數據
    push(){
        let that = this;
        let info = JSON.parse(JSON.stringify(that.info)); // 拷貝原數據, 深拷貝
        info.forEach((item, index )=>{
            // 執行 select 為true 的數據
            if (item.select){
                that.new_info = that.new_info.concat(item).sort((a,b)=>{ return a.id - b.id }); // 添加到新數據框, 排序
                delete info[index];    // 刪除數據
                item.select = false; 
            }
        })
        info = info.filter(function (val) { return val }); // 過濾 undefined 
        that.info = info; // 更新原數據\
    },
    // 移除數據
    del(){
        let that = this;
        let info = JSON.parse(JSON.stringify(that.new_info)); // 拷貝原數據, 深拷貝
        info.forEach((item, index )=>{
            // 執行 select 為true 的數據
            if (item.select){
                that.info = that.info.concat(item).sort((a,b)=>{ return a.id - b.id }); // 添加到新數據框, 排序
                delete info[index];    // 刪除數據
                item.select = false;
            }
        })
        info = info.filter(function (val) { return val }); // 過濾 undefined 
        that.new_info = info; // 更新原數據
    },
},

mounted(){
    let that = this;
    // 給原始數據添加一個 select 字段，判斷是否選中
    that.info.map((val,key)=>{ that.$set(val,'select',false) });
}