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Todo-List案例版本二

2023-07-13

(160条消息) Todo-List案例版本一_bubbleJessica的博客-CSDN博客

引入了localStorage,让案例更加完善

src/App.vue

<template>
    <div id="root">
        <div class="todo-container">
            <div class="todo-wrap">
                <MyHeader :addToDo="addToDo" />
                <MyList :todos="todos" :checkTodo="checkTodo" :deleteTodo="deleteTodo" />
                <MyFooter :todos="todos" :checkAllTodo="checkAllTodo" :clearAllTodo="clearAllTodo" />
            </div>
        </div>
    </div>
</template>

<script>
import MyHeader from './components/MyHeader'
import MyList from './components/MyList'
import MyFooter from './components/MyFooter'

export default {
    name: 'App',
    data() {
        return {
            // 由于todos是MyHeader组件和MyFooter组件都在使用,所以放在App中(状态提升)
            todos: JSON.parse(localStorage.getItem('todos')) || []
        }
    },
    components: { MyHeader, MyList, MyFooter },
    methods: {
        // 添加一个todo
        addToDo(todoObj) {
            this.todos.unshift(todoObj)
        },
        // 勾选or取消勾选一个todo
        checkTodo(id) {
            this.todos.forEach((todo) => {
                if (todo.id === id) todo.done = !todo.done
            })
        },
        // 删除一个todo
        deleteTodo(id) {
            // 注意:filter不改变原数组,只是新建一个数组
            this.todos = this.todos.filter((todo) => {
                return todo.id !== id
            })
        },
        // 全选or取消全选
        checkAllTodo(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
            })
        }
    },
    watch: {
        // todos简写不包含深度监视
        // todos(value) {
        //     localStorage.setItem('todos', JSON.stringify(value))
        // }

        // todos完整版深度监视
        todos:{
            deep:true,
            handler(value){
                localStorage.setItem('todos', JSON.stringify(value))
            }
        }
    }
}
</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-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>

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