196 lines
5.2 KiB
HTML
196 lines
5.2 KiB
HTML
<!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 http-equiv="X-UA-Compatible" content="IE=edge">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Document</title>
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<style>
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body {
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margin: 0;
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padding: 0;
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width: 100%;
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height: 100vh;
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}
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img {
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width: 80px;
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height: 96px;
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position: fixed;
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top: -96px;
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}
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.dialog {
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position: fixed;
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width: 100%;
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height: 100%;
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background: #0000008c;
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z-index: 9999;
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display: none;
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}
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.center {
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width: 40%;
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background: #fff;
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padding: 15px 10px;
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border-radius: 4px;
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position: absolute;
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left: 50%;
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top: 50%;
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transform: translate(-50%, -50%);
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}
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.title {
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height: 40px;
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line-height: 40px;
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border-bottom: 1px solid #ebe9e9;
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}
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.content {
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padding: 20px 0;
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text-align: center;
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}
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.footer {
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display: flex;
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justify-content: flex-end;
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}
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.footer .ok {
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padding: 3px 15px;
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background: #2a6bf4;
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color: #fff;
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font-size: 13px;
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border-radius: 4px;
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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="dialog">
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<div class="center">
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<div class="title">提示</div>
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<div class="content"></div>
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<div class="footer">
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<div class="ok">确定</div>
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</div>
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</div>
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</div>
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<!-- 1 获取事件； 2 绑定事件； 3 事件处理函数。
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该事件：首先：红包随机出现在屏幕上：
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1、获取屏幕的长宽，用来计算红包出现的位置；2、创建红包，引入红包图片，并给它设置在x轴上随机出现Math.random()；
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3、给红包绑定点击事件，并限制3次点击次数；3、点击确定红包消失；4、红包展现在html上；
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其次：设置动画：1、红包从屏幕顶部上方随机生成，之后开始下落，完全下降到底部以后消失；
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最后：打开并去除红包:1、红包被点击以后被打开；2、规定中奖几率和次数；3、点击确定按钮以后，关闭红包；4、红包随即消失；
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甲方需求：屏幕上随机生成红包雨，用户可点击，点击时红包雨暂停，确定后该红包消失，红包雨继续。要规定中奖机率和抽奖次数 -->
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</body>
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<script>
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//返回值
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function $(className) {
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return document.querySelector(className)
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}
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// 返回数组
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function _(className) {
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return document.querySelectorAll(className)
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}
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var dialog = $('.dialog')
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var center = $('.center')
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var content = $('.content')
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var ok = $('.ok')
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var body = $('body')
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var {clientWidth,clientHeight} = document.body;
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var click = 0
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// 红包相关属性创建
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function HB() {
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var img = document.createElement("img");
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var x = Math.random() * (clientWidth - 80)
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img.src = "../hb.png";
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img.style.left = `${x}px`;
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img.style.top = '-96px'
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img.onclick = function () {
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clickImg = img
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click += 1
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//清除红包向下滚动定时器
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_('img').forEach((value, index) => {
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clearTimeout(value.time)
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})
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//清除创建红包定时器
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clearInterval(createdNumber)
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if (click > 3) {
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content.innerText = "三次抽奖已经用完"
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dialog.style.display = "block"
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} else {
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rate()
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dialog.style.display = "block"
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}
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}
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body.appendChild(img)
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move(img)
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}
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// 定义中奖几率
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function rate() {
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var num = Math.random();
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if (num > 0 && num <= 0.5) {
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content.innerText = "恭喜您中了九折"
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} else if (num > 0.5 && num <= 0.9) {
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content.innerText = "恭喜您中了八折"
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} else {
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"恭喜您中了五折"
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}
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}
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// 红包定时生成
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createdNumber = setInterval(() => {
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HB()
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}, 1000)
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// 红包运动
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function move(tag) {
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var now = Number(tag.style.top.split('px')[0])
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if (now <= clientHeight) {
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tag.time = setTimeout(() => {
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tag.style.top = `${now + 3}px`
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move(tag)
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}, 15)
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} else {
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body.removeChild(tag)
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}
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}
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// 红包关闭
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ok.onclick = function (){
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dialog.style.display = "none"
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body.removeChild(clickImg)
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//重新设置 创建红包定时器
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createdNumber = setInterval(() => {
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HB()
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}, 1000)
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//重新设置页面红包向下滚动
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_('img').forEach((value, index) => {
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value.time = setTimeout(() => {
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move(value)
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}, 15)
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})
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}
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</script>
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</html> |