0.需求说明
表单中同意用户协议未选择时，让该部分抖动，可以给用户友好的提示。
1.实现方法
核心部分
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| <div class="agree" id="agree">
<input type="checkbox" id="checkbox" />
<span>同意<a href="#" class="agreelink">《用户协议》</a></span>
</div>
<div class="form-submit" onclick="submit()">登录</div>
|
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| function submit() {
let elem = document.getElementById("agree");
console.log($("#checkbox").is(":checked"));
if (!$("#checkbox").is(":checked")) {
if (elem) {
elem.classList.add('shake')
setTimeout(() => { elem.classList.remove('shake') }, 800)
}
}
}
|
注意：项目必须引入jQuery <script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.js"></script>
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| .shake {
animation: shake 800ms ease-in-out;
}
@keyframes shake {
10%,
90% {
transform: translate3d(-1px, 0, 0);
}
20%,
80% {
transform: translate3d(+2px, 0, 0);
}
30%,
70% {
transform: translate3d(-4px, 0, 0);
}
40%,
60% {
transform: translate3d(+4px, 0, 0);
}
50% {
transform: translate3d(-4px, 0, 0);
}
}
|
完整代码
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| <!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>登录页面</title>
<script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.js"></script>
</head>
<body>
<h1 class="title">欢迎使用***系统</h1>
<div class="logincontent">
<div class="image">
<img src="login.png" class="pic">
</div>
<div class="login-box">
<form name="login_form" id="login_form">
<div class="form-item-wrap">
<label for="username" class="form-label">用户名</label>
<input type="text" name="username" id="username" class="form-input" placeholder="请输入用户名">
</div>
<div class="form-item-wrap">
<label for="password" class="form-label">密码</label><br />
<input type="password" name="password" id="password" class="form-input" placeholder="请输入密码">
</div>
<div class="agree" id="agree">
<input type="checkbox" id="checkbox" />
<span>同意<a href="#" class="agreelink">《用户协议》</a></span>
</div>
<div class="form-submit" onclick="submit()">登录</div>
</form>
</div>
</div>
</body>
<script>
function submit() {
let elem = document.getElementById("agree");
console.log($("#checkbox").is(":checked"));
if (!$("#checkbox").is(":checked")) {
if (elem) {
elem.classList.add('shake')
setTimeout(() => { elem.classList.remove('shake') }, 800)
}
}
}
</script>
<style>
.title {
margin-top: 5%;
text-align: center;
}
.logincontent {
padding-top: 100px;
display: flex;
}
.image {
flex: 1;
size: 50%;
display: flex;
align-items: center;
justify-content: center;
}
.pic {
width: 75%;
height: auto;
}
.login-box {
flex: 1;
width: 150px;
min-width: 150px;
height: 400px;
min-height: 400px;
margin-left: 100px;
}
#login_form {
width: 80%;
margin-top: 10%;
}
.login-title {
text-align: center;
color: cornflowerblue;
}
.form-item-wrap {
width: 50%;
margin-top: 20px;
margin-bottom: 20px;
}
.form-label {
width: 100%;
margin-top: 10px;
margin-bottom: 10px;
margin-left: 20px;
}
.form-input {
width: 80%;
margin-top: 10px;
margin-bottom: 10px;
margin-left: 20px;
padding: 5px;
}
.agree {
margin-left: 20px;
}
.form-submit {
width: 40%;
height: 40px;
margin-left: 24px;
margin-top: 15px;
padding-top: 2px;
cursor: pointer;
font-size: 25px;
text-align: center;
background-color: #00aff0;
color: #ffffff;
border-radius: 10px;
}
.agreelink {
text-decoration: none;
}
.shake {
animation: shake 800ms ease-in-out;
}
@keyframes shake {
10%,
90% {
transform: translate3d(-1px, 0, 0);
}
20%,
80% {
transform: translate3d(+2px, 0, 0);
}
30%,
70% {
transform: translate3d(-4px, 0, 0);
}
40%,
60% {
transform: translate3d(+4px, 0, 0);
}
50% {
transform: translate3d(-4px, 0, 0);
}
}
</style>
</html>
|
