vue--day50--todolist案例自定义事件修改footer 和header 修改

标签：vue return 自定义 -- 修改 1px done todo todos

1.MyHeader.vue

<template> <div class="todo-header"> <!--v-model:="title" 是实时绑定的 --> <input type="text" placeholder="请输入你的任务名称，回车键确认" v-model="title" @keyup.enter="add"/> </div> </template>
<script> import {nanoid} from 'nanoid' export default { name:"MyHeader", data(){ return { title:"" } }, methods:{ add(){ //console.log(e.target.value);   //const todoObj={id:nanoid(),title:e.target.value,done:false} if(!this.title.trim()) return alert("输入不能为空"); //将用户的输入包装成一个todo 对象 const todoObj={id:nanoid(),title:this.title,done:false} //console.log(todoObj); // 通知app 组件去添加一个todo 对象 this.$emit('addTodo',todoObj) this.title='' } } } </script>

<style scoped>
/*header*/ .todo-header input { width: 560px; height: 28px; font-size: 14px; border: 1px solid #ccc; border-radius: 4px; padding: 4px 7px; }
.todo-header input:focus { outline: none; border-color: rgba(82, 168, 236, 0.8); box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6); }
</style>

 

 

2.MyFooter.vue

<template> <div class="todo-footer" v-show="total"> <label> <!-- <input type="checkbox" :checked="isAll" @change="checkAll"/> --> <!--换种写法输入类型的节点 初始值要展示 并且后面要交互--> <input type="checkbox" v-model="isAll" /> </label> <span> <span>已完成{{ doneTotal }}</span>/ 全部{{ total}} </span> <button class="btn btn-danger" @click="clearAll">清除已完成任务</button> </div> </template>

<script> export default { name:"MyFooter", props:['todos'], computed:{ total(){ return this.todos.length }, doneTotal(){ // const donetotal=this.todos.reduce((pre,current)=>{ // //console.log('@@@@@@@'); // return pre+(current.done?1:0) // },0) // return donetotal; //简写 return this.todos.reduce((pre,current)=>pre+(current.done?1:0),0);
}, // 这个是简写的形式 只被读取 不能被修改 // isAll(){ // return this.doneTotal===this.total&&this.total>0 // }
isAll:{ get(){ return this.doneTotal===this.total&&this.total>0 }, set(checked){ this.$emit('checkAllTodo',checked)   } } }, methods:{ checkAll(e){ this.checkAllTodo(e.target.checked) }, clearAll(){   this.$emit('clearAllTodo') } } } </script>

<style scoped> /*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>

 

 

3.App.vue

 

 

<template> <div id="root"> <div class="todo-container"> <div class="todo-wrap"> <!-- @addTodo 事件名 addTodo 回调名--> <MyHeader @addTodo="addTodo"/> <!--父亲给儿子传数据 父亲通过数据绑定传数据 儿子通过 props:['todos'],//声明接收todo 对象 --> <MyList :todos="todos" :checkTodo="checkTodo" :deleteTodo="deleteTodo"/> <MyFooter :todos="todos" @checkAllTodo="checkAllTodo" @clearAllTodo="clearAllTodo"/> </div> </div> </div>     </template>
<script> //样式的引入和这里有关系 import MyHeader from './components/MyHeader.vue'; import MyList from './components/MyList.vue'; import MyFooter from './components/MyFooter.vue';

export default { name: 'App', components: { MyHeader, MyList, MyFooter }, data(){ return { todos:JSON.parse(localStorage.getItem("todos"))||[] }   },
methods:{ // 添加一个todo addTodo(todoObj){ // console.log('我是app组件,我收到了数据x==',todoObj); this.todos.unshift(todoObj)
}, //勾选or 取消勾选 todo checkTodo(id){ this.todos.forEach((todo)=>{ if(todo.id===id) todo.done=!todo.done }) }, //删除一个todo deleteTodo(id){ this.todos=this.todos.filter((todo)=>{ return todo.id!==id; }) },
//全选or全不选 checkAllTodo(done){ this.todos.forEach((todo)=>{ todo.done=done }) },
clearAllTodo(){ this.todos=this.todos.filter((todo)=>{ return !todo.done }) }
}, watch:{ // todos(value){ // localStorage.setItem("todos", JSON.stringify(value)); // } todos:{ deep:true, handler(value){ localStorage.setItem("todos", JSON.stringify(value)); } }
} } </script>
<style>

/* 整体样式 */ body { background: rgba(230, 241, 245, 0.816); }
.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-danger:hover { color: #fff; background-color: #bd362f; }
.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>

标签：vue,return,自定义,--,修改,1px,done,todo,todos
From： https://www.cnblogs.com/satisfysmy/p/17599459.html