vue--day44-todolist的localStorage本地存储

标签：vue -- todolist done localStorage todo id todos

添加修改删除数据发生变化，可以用watch 监测来实现监测数据的变化

1. App.vue 

 

<template> <div id="root"> <div class="todo-container"> <div class="todo-wrap"> <!--传递函数 儿子给父亲传东西,父亲偷偷传递一个函数，儿子调用这个函数--> <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,--,todolist,done,localStorage,todo,id,todos
From： https://www.cnblogs.com/satisfysmy/p/17581255.html