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<!DOCTYPE html> |
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<html lang="en"> |
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<head> |
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<meta charset="UTF-8"> |
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<meta name="viewport" content="width=device-width, initial-scale=1.0"> |
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<meta http-equiv="X-UA-Compatible" content="ie=edge"> |
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<title>许愿墙</title> |
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<style> |
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* { |
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margin: 0; |
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padding: 0; |
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} |
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html { |
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height: 100%; |
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background: linear-gradient(0deg, rgb(171, 212, 238), deepskyblue); |
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} |
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body { |
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position: relative; |
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} |
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.container { |
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width: 100%; |
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height: 630px; |
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position: relative; |
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} |
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input[id="res"] { |
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width: 300px; |
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height: 40px; |
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position: fixed; |
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bottom: 30px; |
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left: 50%; |
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margin-left: -150px; |
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padding-left: 15px; |
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border: 1px solid #ccc; |
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outline: none; |
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border-radius: 5px; |
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} |
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.item { |
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width: 150px; |
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height: 150px; |
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position: absolute; |
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top: 100px; |
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left: 100px; |
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box-shadow: 0 2px 10px 1px rgba(0, 0, 0, 0.2); |
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padding: 10px; |
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border-radius: 15px/5px 10px 10px 0; |
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transform: skew(-1deg); |
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cursor: move; |
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} |
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.item span { |
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position: absolute; |
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right: 6px; |
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bottom: 4px; |
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font-size: 12px; |
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color: #eee; |
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cursor: pointer; |
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} |
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.comfirmBtn { |
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width: 100px; |
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height: 40px; |
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position: fixed; |
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bottom: 31px; |
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left: 64%; |
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border: none; |
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outline: none; |
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border:1px solid; |
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border-radius: 10px; |
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cursor: pointer; |
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} |
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</style> |
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</head> |
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<body> |
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<div class="container"></div> |
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<input type="text" name="res" id="res" placeholder="随便说说吧...点击确认按钮发布"> |
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<button class="comfirmBtn">点击发布</button> |
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<script> |
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// 获取DOM元素 |
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let container = document.getElementsByClassName('container')[0]; |
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let btn = document.getElementsByClassName('comfirmBtn')[0]; |
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// 默认的许愿单文字 |
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let wishes = ['新年来好运', '能找一份好工作', '日语等级考试通过', '能交上女朋友', '新年来好运', '能找一份好工作', '日语等级考试通过', '能交上女朋友']; |
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// 许愿单随机背景颜色 |
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let bgcColors = ['#96c2f1', '#bbe1f1', '#e3e197', '#f8b3d0', '#ffcc00', 'rgba(255,123,123,1)', 'yellowgreen', 'pink', 'skyblue']; |
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// 渲染函数 新增一个div元素 做好css配置以后将该div返回 |
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let render = function (wish) { |
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// 生成随机数据 |
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let bgcColorIndex = Math.floor(Math.random() * bgcColors.length); |
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let randomTop = Math.floor(Math.random() * (630 - 150)); // container容器的高减去150 |
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let randomLeft = Math.floor(Math.random() * (window.innerWidth - 175)); // left值在减去盒子宽度150的基础上多减去了25px |
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let content = `<div class="item" >${wish}<span>关闭</span></div>`; |
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container.innerHTML += content; |
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} |
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// 页面刚开始加载时 将默认的许愿单加载到页面上 |
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window.onload = function () { |
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// 遍历所有默认的许愿单 将其渲染到页面上面 |
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for (let i = 0; i < wishes.length; i++) { |
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render(wishes[i]); |
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} |
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} |
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// 发布新内容函数 |
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let newContent = function () { |
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if (res.value !== '') { |
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let inputText = res.value; |
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render(inputText); |
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res.value = ''; |
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} else { |
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alert('不能为空！'); |
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} |
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} |
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// 有两种方式可以添加新的愿望 按回车键 或者 点击发布按钮 |
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document.onkeyup = function (e) { |
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if (e.keyCode === 13) { |
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newContent(); |
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} |
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} |
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// 为确认按钮添加点击事件 |
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btn.onclick = newContent; |
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// 通过事件委托 给整个document绑定点击事件 但是只有点击span元素的时候 移除其父节点 |
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document.onclick = function (e) { |
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if (e.target.nodeName === 'SPAN') { |
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container.removeChild(e.target.parentNode); |
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} |
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} |
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// 设置许愿单拖动 |
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container.onmousedown = function (e) { |
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if (e.target.className === 'item') { |
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let offsetX = parseInt(e.target.style.left); // 获取当前的x轴距离 |
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let offsetY = parseInt(e.target.style.top); // 获取当前的y轴距离 |
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let innerX = event.clientX - offsetX; // 获取鼠标在方块内的x轴距 |
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let innerY = event.clientY - offsetY; // 获取鼠标在方块内的y轴距 |
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let that = e.target; |
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document.onmousemove = function (e) { |
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that.style.left = event.clientX - innerX + "px"; |
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that.style.top = event.clientY - innerY + "px"; |
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// 边界判断 |
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if (parseInt(that.style.left) <= 0) // 左边边界 |
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{ |
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that.style.left = "0px"; |
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} |
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if (parseInt(that.style.top) <= 0) // 上边边界 |
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{ |
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that.style.top = "0px"; |
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} |
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if (parseInt(that.style.left) >= window.innerWidth - 175) // 右边边界 = 窗口宽度 - 盒子大小 稍微多减去了25px |
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{ |
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that.style.left = window.innerWidth - 175 + "px"; |
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} |
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if (parseInt(that.style.top) >= 480) // 下边边界 = 630 - 150 |
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{ |
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that.style.top = 480 + "px"; |
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} |
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} |
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document.onmouseup = function () { |
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document.onmousemove = null; |
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document.onmouseup = null; |
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} |
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} |
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} |
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</script> |
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</body> |
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</html> |
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