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50 Projects（大抵会不足50个，毕竟目的是了解语法构造去制作游戏）

作者：互联网

50 Projects

01 Expanding Cards(附带新手菜鸡注释)

Live Demo

HTML:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Expanding cards</title>
    <link rel="stylesheet" href="/static/css/Expanding-cards.css">
</head>
<body>
    <div class="container">
        <div class="panel active" style="background-image: url('https://images.unsplash.com/photo-1558979158-65a1eaa08691?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1350&q=80')">
            <h3>Explore World</h3>
        </div>
        <div class="panel" style="background-image: url('https://images.unsplash.com/photo-1572276596237-5db2c3e16c5d?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1350&q=80')">
            <h3>Wild Forest</h3>
          </div>
          <div class="panel" style="background-image: url('https://images.unsplash.com/photo-1507525428034-b723cf961d3e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1353&q=80')">
            <h3>Sunny Beach</h3>
          </div>
          <div class="panel" style="background-image: url('https://images.unsplash.com/photo-1551009175-8a68da93d5f9?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1351&q=80')">
            <h3>City on Winter</h3>
          </div>
          <div class="panel" style="background-image: url('https://images.unsplash.com/photo-1549880338-65ddcdfd017b?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1350&q=80')">
            <h3>Mountains - Clouds</h3>
          </div>
    </div>
    <script type="module" src="/js/Expanding-cards.js"></script>
</body>
</html>

CSS

* {
    box-sizing: border-box;
}

body {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    overflow: hidden;
    margin: 0;
}

.container {
    display: flex;
    width: 90vw;
}

.panel {
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    height: 80vh;
    border-radius: 50px;
    color: #fff;
    cursor:  pointer;
    /* 增长系数,这样会使图片有竖条感觉 */
    flex: 0.5;
    margin: 10px;
    position: relative;
    /* 过渡方式，好多动画用到这个，看来着重要学一下，不过这个all好像去掉不影响大局？ */
    transition: all 700ms ease-in;
    /* 时间影响展示时间，感觉调节时间匹配更好 */
}

.panel h3 {
    font-size: 24px;
    position: absolute;
    /* 定义说明文字位置 */
    bottom: 20px;
    left: 20px;
    margin: 0;
    /* 文字透明度 */
    opacity: 0;
}

.active {
    /* 这个MDN上说是增长系数，就是比值可以这样说吧，按我来讲 */
    flex: 5;
}

.active h3 {
    /* 如果有active属性，就将说明文字显现 */
    opacity: 1;
    transition: opacity 0.3s ease-in 0.4s;
}

@media (max-width: 480px) {
    /* 一般而言这种都是电脑展示吧，所以很鸡肋？当然依然不可或缺，可以不用，但不能没有 */
    .container {
        width: 100vh;
    }
}
/* 下面这个真的不知道为什么有啊 */
/* .panel:nth-of-type(4),
.panel:nth-of-type(5) {
    display: none;
} */

JS

const panels = document.querySelectorAll('.panel');
// 找到pnael标签，这应该是列；
// console.log(panels);


// 遍历所有的元素，查看谁被点击了，找到之后将其他元素的active全部清除，并为当前属性添加active
panels.forEach(function(panel) { //遍历 panels 序列
    panel.addEventListener('click', function(){
        removeActiveClasses(); //移除 active标签
        panel.classList.add('active');
    });
});

function removeActiveClasses () {
    panels.forEach(function (panel) {
        panel.classList.remove('active');
    })
}

Live Demo

HTML:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Hidden-search</title>
    <link rel="stylesheet" href="/static/css/hidden-search.css">
    <link rel="stylesheet" href="/third-part/font-awesome-4.7.0/css/font-awesome.min.css">
    
</head>
<body>
    <div class="search">
        <input type="text" class="input" placeholder="Search...">
        <button class="btn">
            <i class="fa fa-search" aria-hidden="true"></i>
        </button>
    </div>
    <script type="module" src="/js/hidden-search.js"></script>
</body>
</html>

CSS

* {
    box-sizing: border-box;
}

 body {
     /* 背景图片为渐变色 */
    background-image: linear-gradient(90deg,#7d5fff,#7158e2);
    /* flex布局 */
    display: flex;
    /* 竖直居中 */
    align-items: center;
    /* 水平居中 */
    justify-content: center;
    /* 非常奇怪啊，有100vh可以居中，100%不成 */
    height: 100vh;
    overflow: hidden;
    margin: 0;
}  

.search {
    position: relative;
    height: 50px;
}

.search .input {
    background-color: #fff;
    border: 0;
    font-size: 18px;
    padding: 15px;
    height: 50px;
    width: 50px;
    /* 转变属性width */
    transition : width 0.3s ease;

}

.btn {
    background-color: #fff;
    border: 0;
    cursor: pointer;
    font-size: 24px;
    position: absolute;
    top: 0;
    left: 0;
    height: 50px;
    width: 50px;
    /* 平滑移动 */
    transition : transform 0.3s ease;
}
.btn:focus,
.input:focus {
    outline: none
}

.active .input {
    width: 200px;
  }

.active .btn {
    /* 向X轴偏移198px */
    transform: translateX(198px);
  }

JS

let search = document.querySelector('.search');
let btn = document.querySelector('.btn');
let input = document.querySelector('.input');

// 添加监听函数
btn.addEventListener('click',function(e) {
    // 如果active已经存在，则移除它，否则添加属性
    search.classList.toggle('active');
    // 效果：<div class="search active"></div>
    console.log(search);
    // input.focus();
});

标签：flex,大抵,search,50,width,background,active,Projects,panel
来源： https://www.cnblogs.com/Holdpark/p/16381691.html