效果是这样的

可以添加新任务，改变任务状态，与筛选任务列表

使用vant创建的项目

使用到了bootstrap，首先 npm install bootstrap进行安装，安装后导入css与js

上中下是三个组件，依次是 todo_input，todo_list与todo_button

todoinput的样式使用的是 Forms 中的 Input group

<template>
    <div class="input-group mb-3">
        <span class="input-group-text" id="basic-addon1">任务</span>
        <input type="text" class="form-control" placeholder="请填写任务信息" aria-label="Username" aria-describedby="basic-addon1" v-model="content">
        <button type="button" class="btn btn-primary" @click="add_things">添加新任务</button>
    </div>
</template>

<script>
    export default {
        emits:['update:todo_things_list'],
        props:{
            all_todo_things_list:{
                type:Array,
                required:true
            }
        },
        data() {
            return {
                id:2,
                content:''
            }
        },
        methods:{
            add_things() {
                this.id = this.id + 1
                this.$emit('update:all_todo_things_list',[...this.all_todo_things_list,{id:this.id,content:this.content,status:false}])
                this.content = ''
            }
        }
    }
</script>

todo_list使用的是Components中的List group

<template>
    <ul class="list-group">
        <li class="list-group-item" v-for="item,index in show_todo_things_list" key="item.id">
            <input class="form-check-input me-1" type="checkbox" v-model="item.status" :id="'Checkbox' + index">
            <label class="form-check-label" :for="'Checkbox' + index" :class="item.status?'delete_li':''">{{ item.content }}</label>
            <span class="badge bg-success rounded-pill" v-if="item.status">已完成</span>
            <span class="badge bg-warning rounded-pill" v-else>未完成</span>
        </li>
    </ul>
</template>

<script>
    export default {
        props:{
            show_todo_things_list:{
                type:Array,
                required:true
            }
        },
    }
</script>

<style>
    .delete_li {
        text-decoration: line-through;
        color: gray;
        font-style: italic;
    }
</style>

todo_button用的是Components中的Button group

<template>
    <div class="btn-group" role="group" aria-label="Basic radio toggle button group">
        <input type="radio" class="btn-check" name="btnradio" id="btnradio1" autocomplete="off" checked >
        <label class="btn btn-outline-primary" for="btnradio1" @click="change_show_status('全部')">全部</label>

        <input type="radio" class="btn-check" name="btnradio" id="btnradio2" autocomplete="off">
        <label class="btn btn-outline-primary" for="btnradio2" @click="change_show_status('已完成')">已完成</label>

        <input type="radio" class="btn-check" name="btnradio" id="btnradio3" autocomplete="off">
        <label class="btn btn-outline-primary" for="btnradio3" @click="change_show_status('未完成')">未完成</label>
    </div>
</template>

<script>
    export default {
        props:{
            show_status:{
                type:String,
                required:true
            }
        },
        methods:{
            change_show_status(status) {
                this.$emit('update:show_status',status)
            }
        }
    }
</script>

所有的数据都汇总于App.vue

<template>
  <todo_input v-model:all_todo_things_list="all_todo_things_list"></todo_input>
  <todo_list v-model:show_todo_things_list="show_todo_things_list"></todo_list>
  <todo_button v-model:show_status="show_status"></todo_button>
</template>

<script>
import todo_button from './components/todo_button.vue'
import todo_input from './components/todo_input.vue'
import todo_list from './components/todo_list.vue'

export default {
  name: 'App',
  components: {
    todo_button,
    todo_input,
    todo_list
  },
  data() {
    return {
      all_todo_things_list: [
        { id: 0, content: '周一早晨九点开会', status: false },
        { id: 1, content: '周一晚上八点半聚餐', status: false },
        { id: 2, content: '准备周三上午演讲稿', status: true }
      ],
      show_status: '全部',
    }
  },
  computed: {
    show_todo_things_list() {
      if (this.show_status == '已完成') {
        return this.all_todo_things_list.filter(x => x.status == true)
      }
      else if (this.show_status == '未完成') {
        return this.all_todo_things_list.filter(x => x.status == false)
      }
      return this.all_todo_things_list
    }
  }
}
</script>