index.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>log_in</title>
<script src="script.js"></script>
<link rel="stylesheet" href="css/style.css" />
</head>
<body>
<div class="container">
<h1>Please login</h1>
<form>
<div class="form-control">
<input type="text" required>
<label>
Email
</label>
</div>
<div class="form-control">
<input type="password" required>
<label>password</label>
</div>
<button class="btn">Login</button>
<p class="text">Don't have an account?<a href="">Register</a></p>
</form>
</div>
</body>
</html>
style.css
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
body {
height: 100vh;
background: rgb(255, 94, 249);
background: linear-gradient(144deg, rgba(255, 94, 249, 1) 19%, rgba(104, 185, 251, 1) 86%);
color: white;
font-family: sans-serif;
display: flex;
justify-content: center;
align-items: center;
}
/* 表单属性 */
.container {
background-color: rgb(0, 0, 0, 0.4);
padding: 20px 40px;
border-radius: 5px;
}
/* 表单中标题属性 */
.container h1 {
text-align: center;
margin-bottom: 30px;
font-family: '楷体', '微软雅黑';
}
/* 鼠标经过时字体颜色改变 */
.container h1:hover {
background-image: linear-gradient(90deg, #673ab7, #e91e63);
background-clip: text;
-webkit-background-clip: text;
-webkit-text-fill-color: transparent;
background-image: linear-gradient(90deg,
rgb(255, 167, 69),
rgb(254, 134, 159),
rgb(239, 122, 200),
rgb(160, 131, 237),
rgb(67, 174, 255),
rgb(160, 131, 237),
rgb(239, 122, 200),
rgb(254, 134, 159),
rgb(255, 167, 69));
background-size: 200%;
animation: streamer 3s linear infinite;
}
/* 字体颜色变化的动画 */
@keyframes streamer {
0% {
background-position: 200%;
}
100% {
background-position: 0%;
}
}
/* 按钮的属性 */
.btn {
cursor: pointer;
width: 100%;
background-color: lightblue;
padding: 15px;
border: 0;
font-size: 16px;
font-family: inherit;
}
/* 点击按钮时的属性 */
.btn:focus {
outline: 0;
}
/* 点击按钮时的效果,缩小0.98 */
.btn:active {
transform: scale(0.98);
}
/* 下面注册旁的连接 */
.container a {
text-decoration: none;
color: lightblue;
}
.text {
margin-top: 30px;
}
/* 输入框所在容器的类 */
.form-control {
width: 300px;
margin: 20px 0 40px;
position: relative;
}
.form-control input {
width: 100%;
background-color: transparent;
border: 0;
border-bottom: 2px solid white;
display: block;
padding: 15px 0;
font-size: 18px;
color: white;
}
/* 获取焦点时下边框变为蓝色 */
.form-control input:focus {
outline: 0;
border-bottom-color: lightblue;
}
/*当输入框中有文字时，下边框还是蓝色 valid：检测input有没有填*/
.form-control input:valid {
border-bottom-color: lightblue;
}
/* Email与password的属性 */
.form-control label {
position: absolute;
left: 0;
top: 15px;
}
/* Email与password的动画效果 */
.form-control label span {
display: inline-block;
font-size: 18px;
transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}
/* +选择器：选择除了自己之外的其它兄弟元素 */
.form-control input:focus+label span,
.form-control input:valid+label span {
transform: translateY(-30px);
color: lightblue;
}
script.js
window.onload = function () {
const labels = document.querySelectorAll(".form-control label")
labels.forEach(label => {
label.innerHTML = label.innerText.split('').map((letter, index) => `<span style="transition-delay:${index * 35}ms">${letter}</span>`).join('');
});
};
完