用h5+css+js写一个登入界面
时间: 2023-10-07 08:06:03 浏览: 47
好的,我可以为您提供一个简单的登陆界面示例代码。以下是 HTML 、CSS 和 JavaScript 代码:
HTML 代码:
```
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Login Page</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<div class="login-box">
<h2>Login Here</h2>
<form>
<div class="user-box">
<input type="text" name="" required="">
<label>Username</label>
</div>
<div class="user-box">
<input type="password" name="" required="">
<label>Password</label>
</div>
<a href="#">
<span></span>
<span></span>
<span></span>
<span></span>
Submit
</a>
</form>
</div>
</body>
</html>
```
CSS 代码:
```
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
body {
font-family: sans-serif;
background: #f1f1f1;
}
.login-box {
width: 400px;
height: 500px;
background: #fff;
color: #000;
top: 50%;
left: 50%;
position: absolute;
transform: translate(-50%, -50%);
box-shadow: 0 10px 20px rgba(0, 0, 0, 0.5);
padding: 70px 30px;
border-radius: 20px;
}
.login-box h2 {
margin: 0;
padding: 0 0 20px;
text-align: center;
font-size: 30px;
}
.login-box .user-box {
position: relative;
}
.login-box .user-box input {
width: 100%;
padding: 10px 0;
font-size: 16px;
margin-bottom: 30px;
border: none;
border-bottom: 1px solid #000;
outline: none;
background: transparent;
}
.login-box .user-box label {
position: absolute;
top: 0;
left: 0;
padding: 10px 0;
font-size: 16px;
color: #000;
pointer-events: none;
transition: 0.5s;
}
.login-box .user-box input:focus ~ label,
.login-box .user-box input:valid ~ label {
top: -20px;
left: 0;
color: #000;
font-size: 12px;
}
.login-box a {
display: inline-block;
text-decoration: none;
color: #000;
background: #fff;
padding: 10px 20px;
font-size: 20px;
border-radius: 20px;
margin-top: 40px;
position: relative;
overflow: hidden;
}
.login-box a span {
position: absolute;
display: block;
}
.login-box a span:nth-child(1) {
top: 0;
left: -100%;
width: 100%;
height: 2px;
background: linear-gradient(90deg, transparent, #000);
animation: animate1 1s linear infinite;
}
@keyframes animate1 {
0% {
left: -100%;
}
50%,
100% {
left: 100%;
}
}
.login-box a span:nth-child(2) {
top: -100%;
right: 0;
width: 2px;
height: 100%;
background: linear-gradient(180deg, transparent, #000);
animation: animate2 1s linear infinite;
animation-delay: 0.25s;
}
@keyframes animate2 {
0% {
top: -100%;
}
50%,
100% {
top: 100%;
}
}
.login-box a span:nth-child(3) {
bottom: 0;
right: -100%;
width: 100%;
height: 2px;
background: linear-gradient(270deg, transparent, #000);
animation: animate3 1s linear infinite;
animation-delay: 0.5s;
}
@keyframes animate3 {
0% {
right: -100%;
}
50%,
100% {
right: 100%;
}
}
.login-box a span:nth-child(4) {
bottom: -100%;
left: 0;
width: 2px;
height: 100%;
background: linear-gradient(360deg, transparent, #000);
animation: animate4 1s linear infinite;
animation-delay: 0.75s;
}
@keyframes animate4 {
0% {
bottom: -100%;
}
50%,
100% {
bottom: 100%;
}
}
.login-box a:hover span {
animation: none;
}
.login-box a:hover span:nth-child(1) {
left: 0;
}
.login-box a:hover span:nth-child(2) {
top: 0;
}
.login-box a:hover span:nth-child(3) {
right: 0;
}
.login-box a:hover span:nth-child(4) {
bottom: 0;
}
```
JavaScript 代码:
```
const inputs = document.querySelectorAll(".user-box input");
function addClass() {
let parent = this.parentNode;
parent.classList.add("focus");
}
function removeClass() {
let parent = this.parentNode;
if (this.value == "") {
parent.classList.remove("focus");
}
}
inputs.forEach(input => {
input.addEventListener("focus", addClass);
input.addEventListener("blur", removeClass);
});
```
这段代码将会渲染一个登陆框,包含输入用户名和密码的文本框,以及一个提交按钮。CSS 代码将添加一些样式,而 JavaScript 代码将帮助我们在文本框获得焦点和失去焦点时添加或删除一个类名,以便更好地控制样式。