前端小案例 | 喵喵大王立大功 | 一个带便利贴功能的todolist面板

文章目录

📚html
📚css
📚js
- 🐇stickynote.js
- 🐇todolist.js
- 🐇clock.js

📚html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>喵喵大王立大功</title>
    <link rel="stylesheet" href="./style.css">
</head>
<body>
    <main id="board">
        <!-- 代办框 -->
        <section class="container">
            <!-- 标题 -->
            <div class="heading">
              <img class="heading__img" src="./src/吐舌.png">
              <h1 class="heading__title">To-Do List</h1>
            </div>
            <form class="form">
              <div>
                <!-- ~ Today I need to ~ -->
                <label class="form__label" for="todo">~ Today I need to ~</label>
                <!-- 背景音乐 -->
                <audio src="./src/Fall.ogg" controls loop preload="metadata"></audio>
                <!-- 待办事项输入框 -->
                <input class="form__input"
                     type="text" 
                     id="todo" 
                     name="to-do"
                     size="30"
                     required>
                <!-- 提交按钮 -->
                <button class="button"><span>Submit</span></button>
              </div>
            </form>
            <div>
              <!-- 代办事项列表 -->
              <ul class="toDoList">
              </ul>
            </div>
            <div>
                <!-- 代办框右下角那三个猫爪图片 -->
                <img class="cute1" src="./src/cute.png">
                <img class="cute2" src="./src/cute2.png">
                <img class="cute3" src="./src/cute3.png">
            </div>
        </section>
        <!-- 时钟部分 -->
        <div class="clock">
            <!-- 小时 -->
            <div class="hours">
              <div class="first">
                <div class="number">0</div>
              </div>
              <div class="second">
                <div class="number">0</div>
              </div>
            </div>
            <div class="tick">:</div>
            <!-- 分钟 -->
            <div class="minutes">
              <div class="first">
                <div class="number">0</div>
              </div>
              <div class="second">
                <div class="number">0</div>
              </div>
            </div>
            <div class="tick">:</div>
            <!-- 秒 -->
            <div class="seconds">
              <div class="first">
                <div class="number">0</div>
              </div>
              <div class="second infinite">
                <div class="number">0</div>
              </div>
            </div>
        </div>
        <!-- 底下的小猫照片 -->
        <img class="xixi" src="./src/xixi.png">
    </main>
</body>
<script src="https://unpkg.com/gsap@3/dist/gsap.min.js"></script>
<script src="https://unpkg.com/gsap@3/dist/Draggable.min.js"></script>
<script src="https://assets.codepen.io/16327/InertiaPlugin.min.js"></script>
<script src="./js/stickynote.js"></script>
<script src="./js/todolist.js"></script>
<script src="./js/clock.js"></script>
</html>

css_96">📚css

css">@import url('https://fonts.googleapis.com/css?family=Gochi+Hand:wght@400;500;600&display=swap');
html, body {
    display: flex;
    justify-content: center;
    align-items: center;
    color: hsl(198, 1%, 29%);
    font-family: 'Gochi Hand', cursive;
    text-align: center;
    font-size: 130%;  
}

* {
    padding: 0;
    margin: 0;
}

/* 整个面板 */
#board {
    position: relative;
    /* 铺满整个视口 */
    width: 100vw;
    height: 100vh;
    background-color: #f1eee5;
    overflow: hidden;
    perspective: 1600px;
    display: grid;
    box-sizing: border-box;
    padding: 50px;
}

/* 底图 */
.xixi{
    width: 720px;
    height: 120px;
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
}

/* #region代办框start */
/* 整个代办框 */
.container {
    position: relative;
    height: 500px;
    width: 500px;
    background: #f1f5f8;
    /* 背景圆点绘制，每个重复的小方块大小为 25px × 25px */
    background-image: radial-gradient(#bfc0c1 7.2%, transparent 0);
    background-size: 25px 25px;
    border-radius: 20px;
    box-shadow: 4px 3px 7px 2px #00000040;
    padding: 1rem;
    box-sizing: border-box;
    /* 水平居中对齐 */
    margin: 0 auto;
}

/* 标题 */
.heading {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}
/* To-Do List部分样式 */
.heading__title {
    transform: rotate(2deg);
    padding: 0.2rem 1.2rem;
    border-radius: 20% 5% 20% 5%/5% 20% 25% 20%;
    background-color: hsla(53, 100%, 93%, 0.708);
    font-size: 1.5rem;
}
/* 图片元素的宽度为父元素宽度的24% */
.heading__img {
    width: 24%;
}

/* ~ Today I need to ~ */
.form__label {
    display: block;
    margin-top: -20px;
    margin-bottom: 0.5rem;
}
/* 音频 */
audio {
    width: 280px;
    height: 15px;
    margin: 0px auto;
    border: 1px solid #e0dfc6;
    border-radius: 8px;
}
/* 输入框 */
.form__input {
    box-sizing: border-box;
    background-color: transparent;
    padding: 0.3rem;
    /* 边框设置 */
    border-bottom-right-radius: 15px 3px;
    border-bottom-left-radius:3px 15px;
    border: solid 3px transparent;
    border-bottom: dashed 3px #c6beb1;
    /* 字体设置 */
    font-family: 'eryamaomiti', cursive;
    font-size: 1rem;
    color: hsla(260, 2%, 25%, 0.7);
    width: 70%;
    margin-bottom: 20px;
    /* 获得焦点时 */
    &:focus {
        /* 去掉默认的外边框样式 */
        outline: none;
        /* 框变为实线，颜色为#c6beb1 */
        border: solid 3px #c6beb1;
    }
}

/* submit按钮 */
.button {
    padding: 0;
    border: none;
    /* 顺时针旋转4度 */
    transform: rotate(4deg);
    /* 变换的起点为中心点 */
    transform-origin: center;
    font-family: 'eryamaomiti', cursive;
    text-decoration: none;
    padding-bottom: 3px;
    border-radius: 5px;
    /* 添加一个垂直的盒子阴影效果 */
    box-shadow: 0 2px 0 hsl(198, 1%, 29%);
    /* 过渡效果的时间和缓动函数 */
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    /* Base64编码的背景图像 */
    background-image: url('data:image/gif;base64,R0lGODlhBAAEAIABAAAAAAAAACH/C1hNUCBEYXRhWE1QPD94cGFja2V0IGJlZ2luPSLvu78iIGlkPSJXNU0wTXBDZWhpSHpyZVN6TlRjemtjOWQiPz4gPHg6eG1wbWV0YSB4bWxuczp4PSJhZG9iZTpuczptZXRhLyIgeDp4bXB0az0iQWRvYmUgWE1QIENvcmUgNS4wLWMwNjEgNjQuMTQwOTQ5LCAyMDEwLzEyLzA3LTEwOjU3OjAxICAgICAgICAiPiA8cmRmOlJERiB4bWxuczpyZGY9Imh0dHA6Ly93d3cudzMub3JnLzE5OTkvMDIvMjItcmRmLXN5bnRheC1ucyMiPiA8cmRmOkRlc2NyaXB0aW9uIHJkZjphYm91dD0iIiB4bWxuczp4bXA9Imh0dHA6Ly9ucy5hZG9iZS5jb20veGFwLzEuMC8iIHhtbG5zOnhtcE1NPSJodHRwOi8vbnMuYWRvYmUuY29tL3hhcC8xLjAvbW0vIiB4bWxuczpzdFJlZj0iaHR0cDovL25zLmFkb2JlLmNvbS94YXAvMS4wL3NUeXBlL1Jlc291cmNlUmVmIyIgeG1wOkNyZWF0b3JUb29sPSJBZG9iZSBQaG90b3Nob3AgQ1M1LjEgV2luZG93cyIgeG1wTU06SW5zdGFuY2VJRD0ieG1wLmlpZDo5NUY1OENCRDdDMDYxMUUyOTEzMEE1MEM5QzM0NDVBMyIgeG1wTU06RG9jdW1lbnRJRD0ieG1wLmRpZDo5NUY1OENCRTdDMDYxMUUyOTEzMEE1MEM5QzM0NDVBMyI+IDx4bXBNTTpEZXJpdmVkRnJvbSBzdFJlZjppbnN0YW5jZUlEPSJ4bXAuaWlkOjk1RjU4Q0JCN0MwNjExRTI5MTMwQTUwQzlDMzQ0NUEzIiBzdFJlZjpkb2N1bWVudElEPSJ4bXAuZGlkOjk1RjU4Q0JDN0MwNjExRTI5MTMwQTUwQzlDMzQ0NUEzIi8+IDwvcmRmOkRlc2NyaXB0aW9uPiA8L3JkZjpSREY+IDwveDp4bXBtZXRhPiA8P3hwYWNrZXQgZW5kPSJyIj8+Af/+/fz7+vn49/b19PPy8fDv7u3s6+rp6Ofm5eTj4uHg397d3Nva2djX1tXU09LR0M/OzczLysnIx8bFxMPCwcC/vr28u7q5uLe2tbSzsrGwr66trKuqqainpqWko6KhoJ+enZybmpmYl5aVlJOSkZCPjo2Mi4qJiIeGhYSDgoGAf359fHt6eXh3dnV0c3JxcG9ubWxramloZ2ZlZGNiYWBfXl1cW1pZWFdWVVRTUlFQT05NTEtKSUhHRkVEQ0JBQD8+PTw7Ojk4NzY1NDMyMTAvLi0sKyopKCcmJSQjIiEgHx4dHBsaGRgXFhUUExIREA8ODQwLCgkIBwYFBAMCAQAAIfkEAQAAAQAsAAAAAAQABAAAAgYEEpdoeQUAOw==');
    background-color: hsla(0, 0%, 100%, 0.7);
}
/* 按钮内文本样式 */
.button span {
    background: #f1f5f8;
    display: block;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    border: 2px solid hsl(198, 1%, 29%);
}
/* 按钮在激活状态和获取焦点时 */
.button:active, .button:focus {
    transform: translateY(4px);
    padding-bottom: 0px;
    outline: 0;
}

/* 代办事项列表 */
.toDoList {
    padding-left: 2.5rem;
    text-align: left;
}
li {
    position: relative;
    padding-top: 0.2rem;
    font-size: 24px;
    color: #3c4654;
    font-family: 'eryamaomiti', cursive;
}
/* 悬停时添加删除线效果 */
li:hover {
    text-decoration: line-through #d5c8a0;
}

/* 右下角的三个爪子 */
.cute1{
    position: absolute; 
    bottom: 5px; 
    right: 70px; 
    width: 100px;
    height: 100px;
}
.cute2{
    position: absolute; 
    bottom: 70px; 
    right: 5px; 
    width: 100px;
    height: 100px;
}
.cute3{
    position: absolute; 
    bottom: 0; 
    right: 0; 
    width: 100px;
    height: 100px;
}
/* #endregion代办框end */

/* #region便利贴start */
/* 便利贴样式 */
.stickynote {
    position: absolute;
    width: 200px;
    height: 200px;
    box-sizing: border-box;
    padding: 10px;
    transform: rotateX(5deg);
    box-shadow: -1px 10px 5px -4px rgba(0, 0, 0, 0.02), 
                inset 0 24px 30px -12px rgba(0, 0, 0, 0.2);
    /* 之后便利贴内文本框居中 */
    display: flex;
    justify-content: center;
    align-items: center;
}
/* 便利贴文本框 */
.stickynote-text {
    border-radius: 10px;
    color: #686a67;
    font-size: 20px;
    font-weight: 400;
    border: none;
    background: transparent;
    outline: none;
    text-align: center;
    resize: none;
    overflow: hidden;
    font-family: 'eryamaomiti', cursive;
}
/* 获得焦点时 */
.stickynote-text:focus {
    background-color: rgba(0,0,0,0.2);
}
/* 占位符（输入文本前的文本显示） */
.stickynote-text::placeholder {
    color: #686a67;
    opacity: 30%;
}
/* #endregion便利贴end */

/* #region时钟start */
.clock {
    margin: -80px auto;
    height: 10vh;
    color: #e2a2aca1;
    font-size: 10vh;
    font-family: 'eryamaomiti';
    line-height: 10vh;
    display: flex;
    position: relative;
    overflow: hidden;
}
.clock > div {
    display: flex;
}
.tick {
    line-height: 7vh;
}
.tick-hidden {
    opacity: 0;
}
/* 线性过渡，持续时间为1s */
.move {
    animation: move linear 1s infinite;
}
@keyframes move {
    from {
        transform: translateY(0vh);
    }
    to {
        transform: translateY(-10vh);
    }
}
/* #endregion时钟end */

js_369">📚js

js_370">🐇stickynote.js

js">// 获取id为board的元素
const board = document.querySelector("#board"); 

// 循环创建102个便利贴
for (let i = 0; i < 102; i++) {
    // 创建div元素作为便利贴的容器，并添加类名"stickynote"
    const sticky = document.createElement("div"); 
    sticky.classList.add("stickynote");  
    if((i + 1) % 6 == 0)
    {
        // 红
        sticky.style.background='#f0c2a2';
    }
    else if((i + 1) % 6 == 5)
    {
        // 黄
        sticky.style.background='#fffbc7';
    }
    else if((i + 1) % 6 == 4)
    {
        // 蓝
        sticky.style.background='#aed0ee';
    }
    else if((i + 1) % 6 == 3)
    {
        // 粉
        sticky.style.background='#f9d3e3';
    }
    else if((i + 1) % 6 == 2)
    {
        // 绿
        sticky.style.background='#bfd1b1';
    }
    else if((i + 1) % 6 == 1)
    {
        // 紫
        sticky.style.background='#dcc7e1';
    }
    // 创建一个textarea元素作为便利贴的文本框
    const text = document.createElement("textarea"); 
    // 设置输入类型为文本
    text.type = "text"; 
    // 设置占位符文本为"Drag Me"
    text.placeholder = "Drag Me"; 
    // 设置最大字符长度为100
    text.maxLength = 100; 
    // 添加类名"stickynote-text"到便利贴文本框
    text.classList.add("stickynote-text"); 

    // 将文本框添加到便利贴容器中
    sticky.appendChild(text); 
    // 将便利贴容器添加到板块中
    board.appendChild(sticky); 
}

// 自适应便利贴文本框高度
document.querySelectorAll('textarea').forEach(textarea => {
    function setHeight() {
        // 先重置高度
        textarea.style.height = 'auto'; 
        // 根据实际内容设置高度
        textarea.style.height = `${textarea.scrollHeight}px`; 
    }
    setHeight();
     // 输入时自动调整高度
    textarea.addEventListener('input', setHeight);
    // 内容改变时自动调整高度
    textarea.addEventListener('change', setHeight); 
});

// 创建可拖动便利贴的对象
const draggables = Draggable.create(".stickynote", {
    // 设置拖动方向为水平和垂直
    type: "x,y", 
    // 拖动开始时的回调函数
    onDragStart: function () { 
        // 启用惯性动画，外部js库
        InertiaPlugin.track(this.target, "x"); 
        // 拖动开始时的动画效果
        grabNoteAnimation(this.target); 
        const inputField = this.target.querySelector('.stickynote-text');
        // 修改文本框的占位符文本
        inputField.placeholder = "Stick Me"; 
    },
    // 拖动中的回调函数
    onDrag: function () { 
        // 获取水平方向上的速度
        let dx = InertiaPlugin.getVelocity(this.target, "x"); 
        // 调用GSAP库
        gsap.to(this.target, { 
            // 根据速度旋转便利贴(所以会有越快越歪)
            rotation: dx * -0.003, 
            duration: 0.5,
            ease: "elastic.out(1.8, 0.6)",
            // 动画完成后的回调函数
            onComplete: function () { 
                // 旋转回初始状态
                gsap.to(this.target, { 
                    rotation: 0,
                    duration: 0.5,
                    ease: "elastic.out(1.8, 0.6)"
                });
            }
        });
    },
     // 拖动结束时的回调函数
    onDragEnd: function () {
        releaseNoteAnimation(this.target); 
        const inputField = this.target.querySelector('.stickynote-text');
        // 贴好了，就是"Write On Me"
        inputField.placeholder = "Write On Me"; 
    },
    // 避免拖动时误触发内部元素的点击事件
    dragClickables: false, 
});

// 拖动便利贴时的抓取动画
function grabNoteAnimation(target) {
    // 创建动画时间线对象
    const timeline = gsap.timeline(); 
    timeline
        .to(target, {
            rotateX: 30, 
            boxShadow: "-1px 14px 40px -4px rgba(0, 0, 0, 0.12), inset 0 14px 20px -12px rgba(0, 0, 0, 0.3)", // 添加阴影效果
            duration: 0.3
        })
        .to(target, {
            // 将便利贴旋转回初始状态
            rotation: 0, 
            rotateX: 5,
            // 缩放便利贴
            scale: 1.1, 
            boxShadow: "-1px 14px 40px -4px rgba(0, 0, 0, 0.12), inset 0 24px 30px -12px rgba(0, 0, 0, 0.3)", // 调整阴影效果
            // 弹性缓动效果
            ease: "elastic.out(0.8, 0.5)" 
        }, 0.15);
    timeline.play();
}

// 释放便利贴时的动画
function releaseNoteAnimation(target) {
    const timeline = gsap.timeline(); 
    timeline
        .to(target, {
            rotateX: 30, 
            boxShadow: "-1px 10px 5px -4px rgba(0, 0, 0, 0.02), inset 0 24px 30px -12px rgba(0, 0, 0, 0.2)", // 调整阴影效果
            duration: 0.3
        })
        .to(target, {
            // 还原缩放
            scale: 1 
        }, 0)
        .to(target, {
            // 将便利贴旋转回初始状态
            rotateX: 5, 
            boxShadow: "-1px 10px 5px -4px rgba(0, 0, 0, 0.02), inset 0 24px 30px -12px rgba(0, 0, 0, 0.2)", // 调整阴影效果
            ease: "elastic.out(0.8, 0.5)"
        }, 0.2);
    timeline.play();
}

// 双击便利贴删除
document.querySelectorAll(".stickynote").forEach((sticky) => {
    sticky.addEventListener("dblclick", function() {
        const dragInstance = draggables.find((instance) => instance.target === sticky);
        if (dragInstance) {
            dragInstance.disable();
        }
        sticky.remove();
    });
});

// 输入框获得焦点时禁用拖动
// 输入框失去焦点时重新启用拖动
document.querySelectorAll(".stickynote-text").forEach((textField) => {
    textField.addEventListener("focus", () => {
        draggables.forEach((instance) => {
            if (instance.target.contains(textField)) {
                instance.disable();
            }
        });
    });

    textField.addEventListener("blur", () => {
        draggables.forEach((instance) => {
            if (instance.target.contains(textField)) {
                instance.enable();
            }
        });
    });
});

js_566">🐇todolist.js

js">(() => { 
    // 锁定元素
    const form = document.querySelector(".form"); 
    const input = form.querySelector(".form__input"); 
    const ul = document.querySelector(".toDoList"); 

    // 代办提交时
    form.addEventListener('submit', e => {
        // 阻止表单的默认提交行为
        e.preventDefault(); 
        // 生成唯一的id
        let itemId = String(Date.now()); 
        // 获取输入框中的待办事项内容
        let toDoItem = input.value; 
        // 如果待办事项列表已经有6个或以上的项
        if (ul.children.length >= 6) { 
            alert("喵喵大王处理不过来啦！"); 
            return;
        }
        // 将待办事项添加到页面中
        const li = document.createElement('li'); 
        li.setAttribute("data-id", itemId); 
        li.innerText = toDoItem; 
        ul.appendChild(li);
        
        // 清空输入框
        input.value = ''; 
    });

    // 点击删除时
    ul.addEventListener('click', e => {
        // 获取被点击项的id
        let id = e.target.getAttribute('data-id') 
        // 如果被点击的不是待办事项，则退出函数
        if (!id) return 
        // 弹出确认对话框，确认是否删除该待办事项
        if (confirm("喵喵大王会把它销毁哦——")) { 
            // 从页面中删除该待办事项
            var li = document.querySelector('[data-id="' + id + '"]'); 
            ul.removeChild(li); 
        }
    });
})();

js_614">🐇clock.js

js">// 锁定元素
var hoursContainer = document.querySelector('.hours') 
var minutesContainer = document.querySelector('.minutes') 
var secondsContainer = document.querySelector('.seconds') 
var tickElements = Array.from(document.querySelectorAll('.tick')) 

// 保存上一次时间，初始值为0。
var last = new Date(0) 
// 设置为-1，以确保首次更新所有时间显示
last.setUTCHours(-1) 
// 用于记录动画效果的状态
var tickState = true 

// 更新时间
function updateTime () {
    var now = new Date 
    var lastHours = last.getHours().toString() 
    var nowHours = now.getHours().toString()
    // 如果上一次时间的小时和当前时间的小时不相等
    if (lastHours !== nowHours) {
        // 更新小时的显示
        updateContainer(hoursContainer, nowHours) 
    }
    // 分钟和秒同理
    var lastMinutes = last.getMinutes().toString() 
    var nowMinutes = now.getMinutes().toString() 
    if (lastMinutes !== nowMinutes) { 
        updateContainer(minutesContainer, nowMinutes) 
    }
    var lastSeconds = last.getSeconds().toString() 
    var nowSeconds = now.getSeconds().toString() 
    if (lastSeconds !== nowSeconds) {
        updateContainer(secondsContainer, nowSeconds) 
    }
    // 更新上一次时间为当前时间
    last = now 
}

// 切换'tick'元素的CSS类'tick-hidden'以实现闪烁效果
function tick () {
    tickElements.forEach(t => t.classList.toggle('tick-hidden')) 
}

// 更新显示
function updateContainer (container, newTime) {
    var time = newTime.split('') 
    if (time.length === 1) { 
        //单个数字补0
        time.unshift('0') 
    }
    // 更新显示
    var first = container.firstElementChild 
    if (first.lastElementChild.textContent !== time[0]) { 
        updateNumber(first, time[0]) 
    }
    var last = container.lastElementChild 
    if (last.lastElementChild.textContent !== time[1]) { 
        updateNumber(last, time[1])
    }
}

// 变更动画实现
function updateNumber (element, number) {
    var second = element.lastElementChild.cloneNode(true) 
    second.textContent = number 
    element.appendChild(second) 
    element.classList.add('move') 

    setTimeout(function () {
        element.classList.remove('move')
    }, 975)
    //选用975而非1000会更平滑
    setTimeout(function () {
        element.removeChild(element.firstElementChild) 
    }, 975)
}

setInterval(updateTime, 100)

更新，解决删除便利贴颜色混乱的问题

不用以下方法给便利贴设置颜色，这会导致删除便利贴时，颜色重置混乱

css">.stickynote:nth-child(n) {
    background: #dcc7e1;
}
.stickynote:nth-child(2n) {
    background: #bfd1b1;
}
.stickynote:nth-child(3n) {
    background: #f9d3e3;
}
.stickynote:nth-child(4n) {
    background: #aed0ee;
}
.stickynote:nth-child(5n) {
    background: #fffbc7;
}
.stickynote:nth-child(6n) {
    background: #f0c2a2;
}

直接在js生成便利贴时，6个一循环设置好颜色

js"> if((i + 1) % 6 == 0)
  {
       // 红
       sticky.style.background='#f0c2a2';
   }
   else if((i + 1) % 6 == 5)
   {
       // 黄
       sticky.style.background='#fffbc7';
   }
   else if((i + 1) % 6 == 4)
   {
       // 蓝
       sticky.style.background='#aed0ee';
   }
   else if((i + 1) % 6 == 3)
   {
       // 粉
       sticky.style.background='#f9d3e3';
   }
   else if((i + 1) % 6 == 2)
   {
       // 绿
       sticky.style.background='#bfd1b1';
   }
   else if((i + 1) % 6 == 1)
   {
       // 紫
       sticky.style.background='#dcc7e1';
   }