cuecli之todofooter余下功能

app

<template>
    <div id="app">
      <div class="todo-container">
        <div class="todo-wrap">
          
          <MyHeader :addTodo="addTodo"></MyHeader>

          <MyList :todos="todos" :checkTodo="checkTodo" :deletTodo="deletTodo"></MyList>
          
          <MyFooter :todos="todos" :chackAllTodo="chackAllTodo" :clearAllTodo="clearAllTodo"></MyFooter>
        </div>
      </div>
    </div>
</template>

<script>
import MyFooter from './components/MyFooter.vue'
import MyHeader from './components/MyHeader.vue'
// import MyItem from './components/MyItem.vue' item为list的子组件
import MyList from './components/MyList.vue'
// import School from './components/School.vue'
export default {
  name: 'app',
  components: {
    MyHeader,
    MyFooter,
    
    // MyItem,
    MyList
    // School
  },
  data() {
        return {
            todos:[
                {id:"001",title:"吃饭",done:true},
                {id:"002",title:"抽烟",done:false},
                {id:"003",title:"烫头",done:true},
            ]
        }
    },
  methods: {
    //添加一个toido
    addTodo(todoObj){
      this.todos.unshift(todoObj)
    },
    // 勾选或者取消勾选
    checkTodo(id){
      this.todos.forEach((todo) => {
        if (todo.id===id) {
          todo.done=!todo.done;

        }
      });
    },
    // 删除一个todo
    deletTodo(id){
      this.todos=this.todos.filter((todo)=>{
        return todo.id!==id
      })
    },

    // 全选或者全不选
    chackAllTodo(done){
      this.todos.forEach((todo )=> {
        todo.done=done
      });
    },
    // 清除所有已完成的todo
    clearAllTodo(){
      this.todos=this.todos.filter(
        (todo)=>{
          return !todo.done
        }
      )
    }
  },
}
</script>

<style>
  /*base*/
body {
  background: #fff;
}

.btn {
  /* display: inline-block; */
  padding: 4px 12px;
  margin-bottom: 0;
  font-size: 14px;
  line-height: 20px;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
  border-radius: 4px;
}

.btn-danger {
  color: #fff;
  background-color: #da4f49;
  border: 1px solid #bd362f;
}

.btn-edit {
  color: #fff;
  background-color: lightgreen;
  border: 1px solid green;
  margin-right: 5px;
}

.btn-danger:hover {
  color: #fff;
  background-color: #bd362f;
}

.btn-edit:hover {
  color: #fff;
  background-color: green;
}

.btn:focus {
  outline: none;
}

.todo-container {
  width: 600px;
  margin: 0 auto;
}
.todo-container .todo-wrap {
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 5px;
}
</style>

footer

<template>
        <div class="todo-footer" v-show="todos.length">
            <label>
            <!-- <input type="checkbox" :checked="isAll" @change="checkAll"/> -->
            <input type="checkbox" v-model="isAll"/>
            </label>
            <span>
            <span>已完成{{doneTotal}}</span>  /  全部{{todos.length}}
            </span>
            <button class="btn btn-danger" @click="claerAll">清除已完成任务</button>
        </div>
</template>

<script>
export default {
    name:"MyFooter",
    props:[
        "todos",
        "chackAllTodo",
        "clearAllTodo"
    ],
    computed:{
        doneTotal(){
            // const x=this.todos.reduce(
            //     (pre,current)=>{

            //         return pre+(current?1:0)
            //     },
            //     0
            // )
            // return x
             return this.todos.reduce((pre,todo)=> pre+(todo.done?1:0),0)
        },
        // isAll(){
        //    return this.doneTotal===this.todos.length && this.todos.length>0
        // }
        isAll:{
            get(){
                return this.doneTotal===this.todos.length && this.todos.length>0
            },
            set(value){
                // console.log(value);
                   this.chackAllTodo(value)
            }
        }
    },
    methods: {
        // checkAll(e){
        //     //全选或者全不选

        //     this.chackAllTodo(e.target.checked)
        // }

        claerAll(){
            this.clearAllTodo()
        }
    },

}
</script>

<style>
    /*footer*/
    .todo-footer {
    height: 40px;
    line-height: 40px;
    padding-left: 6px;
    margin-top: 5px;
    }

    .todo-footer label {
    display: inline-block;
    margin-right: 20px;
    cursor: pointer;
    }

    .todo-footer label input {
    position: relative;
    top: -1px;
    vertical-align: middle;
    margin-right: 5px;
    }

    .todo-footer button {
    float: right;
    margin-top: 5px;
    }
</style>