jQuery 综合练习ToDoList

 <div class="header">
        <section>
            <label for="">ToDoList</label>
            <input type="text" id="title" name="title" placeholder="添加ToDo" required>
        </section>
    </div>
    <section>
        <h2>正在进行<span id="todocunt"></span></h2>
        <ol id="todolist" class="demo-box">
            <!-- <li>
                <input type="checkbox" name="" id="">
                <p>123</p>
                <a href="#"></a>
            </li> -->
        </ol>
        <h2>已经完成<span id="donecount"></span></h2>
        <ul id="donelist">

        </ul>
        <footer>
            Copyright &copy; 2014 todolist.cn
        </footer>
    </section>

$(function () {
    // localStorage.removeItem('todolist')
    load();
    $("#title").on("keydown", function (event) {
        if (event.keyCode === 13) {
            if ($(this).val() === "") {
                alert("请输入内容")
            } else {
                var local = getDate();
                // 把最新的数据追加给local数组
                local.push({ title: $(this).val(), done: false })
                // 把这个数组local 存储给本地存储
                saveData(local);
                load()
                $(this).val("")
            }
        }
    })


    // 读取本地存储的数据
    function getDate() {
        var data = localStorage.getItem("todolist")
        if (data !== null) {
            return JSON.parse(data);
        } else {
            return [];
        }
    }

    // 保存本地存储数据
    function saveData(data) {
        localStorage.setItem("todolist", JSON.stringify(data));
    }

    // todolist删除
    $("ol,ul").on("click", "a", function () {
        var data = getDate();
        // 修改数据
        var index = $(this).attr("id")
        data.splice(index, 1)
        // 保存到本地存储
        saveData(data);
        // 重新渲染页面
        load()
    })


    // 选项操作
    $("ol,ul").on("click", "input", function () {
        var data = getDate();
        //修改数据
        var index = $(this).siblings("a").attr("id")
        data[index].done = $(this).prop("checked")
        // 保存本地存储
        saveData(data)
        // 重新渲染
        load()
    })

    // 渲染数据
    function load() {
        // 读取本地存储数据
        var data = getDate();
        // 遍历之前需要清空ol里面的内容
        $("ol,ul").empty()
        var todoCount = 0;
        var doneCount = 0;
        $.each(data, function (i, n) {
            if (n.done) {
                $("ul").prepend("<li><input type='checkbox' checked='checked'> <p>" + n.title + "</p> <a href='javadcript:;' id=" + i + ">删除</a></li>")
                doneCount++;
            }
            else {
                $("ol").prepend("<li><input type='checkbox'> <p>" + n.title + "</p> <a href='javadcript:;' id=" + i + ">删除</a></li>");
                todoCount++;
            }
        })
        $("#todocunt").text(todoCount)
        $("#donecount").text(doneCount)


    }
})

body {
    margin: 0;
}

.header {
    height: 50px;
    line-height: 50px;
    background: rgba(47, 47, 47, 0.98);
}

section {
    width: 600px;
    padding: 0 10px;
    margin: 0 auto;

}

label {
    float: left;
    width: 100px;
    line-height: 50px;
    color: #DDD;
    font-size: 24px;
    cursor: pointer;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

.header input {
    float: right;
    width: 60%;
    height: 24px;
    margin-top: 12px;
    text-indent: 10px;
    border-radius: 5px;
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.24), 0 1px 6px rgba(0, 0, 0, 0.45) inset;
    border: none;
}

h2 {
    position: relative;
}

ol,
ul {
    padding: 0;
    list-style: none;
}

li {
    height: 32px;
    line-height: 32px;
    background: #fff;
    position: relative;
    margin-bottom: 10px;
    padding: 0 45px;
    border-radius: 3px;
    border-left: 5px solid #629A9C;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.07);
}
li input {
    position: absolute;
    top: 2px;
    left: 10px;
    width: 22px;
    height: 22px;
    cursor: pointer;
}
ul li {
    border-left: 5px solid #999;
    opacity: 0.5;
}
a,span {
    position: absolute;
    top: 2px;
    right: 5px;
    display: inline-block;
    padding: 0 5px;
    height: 20px;
    border-radius: 20px;
    background: #E6E6FA;
    line-height: 22px;
    text-align: center;
    color: #666;
    font-size: 14px;
}