极客教程如何为网站创建响应式的模态注册表单
网站的注册表单需要具备响应式的特性，以便在不同的显示尺寸上轻松渲染表单，从而使网站适应不同的屏幕宽度。
按照以下步骤使用CSS创建响应式的注册表单。
步骤1：添加HTML
使用“form”元素处理输入。然后为每个字段添加输入（带有相应的标签）。
步骤2：添加CSS
添加所需的CSS来设计登录页面，尽量保持设计简单。
示例： 在此示例中，我们将实现以上方法。
<!DOCTYPE html>
<html>
<style>
/*add full-width input fields*/
input[type=text],
input[type=password] {
width: 100%;
padding: 12px 20px;
margin: 8px 0;
display: inline-block;
border: 2px solid #ccc;
box-sizing: border-box;
}
/* set a style for all buttons*/
button {
background-color: Green;
color: white;
padding: 15px 20px;
margin: 8px 0;
cursor: pointer;
width: 100%;
}
/*set styles for the cancel button*/
.cancelbtn {
padding: 15px 20px;
background-color: #FF2E00;
}
/*float cancel and signup buttons and add an equal width*/
.cancelbtn,
.signupbtn {
float: left;
width: 50%;
}
/*add padding to container elements*/
.container {
padding: 16px;
}
/*clear floats*/
.clearfix::after {
content: "";
clear: both;
display: table;
}
/*styles for cancel button and signup button
on extra small screens*/
@media screen and (max-width: 600px) {
.cancelbtn,
.signupbtn {
width: 100%;
}
}
</style>
<body>
<h2>Signup Form</h2>
<!--Step 1:Adding HTML-->
<form action="/action_page.php" style="border:1px solid #ccc">
<div class="container">
<label><b>Email</b></label>
<input type="text"
placeholder="Enter Email"
name="email" required>
<label><b>Password</b></label>
<input type="password"
placeholder="Enter Password"
name="psw"
required>
<label><b>Repeat Password</b></label>
<input type="password"
placeholder="Repeat Password"
name="psw-repeat"
required>
<input type="checkbox"
checked="checked"> Remember me
<p>To create an account you have to agree our
<a href="#">Terms & Privacy</a>.
</p>
<div class="clearfix">
<button type="button" class="cancelbtn">Cancel</button>
<button type="submit" class="signupbtn">Sign Up</button>
</div>
</div>
</form>
</body>
</html>
输出：
按照以下步骤创建一个响应式的弹出注册页面
步骤1：添加HTML。
使用“form”元素处理输入。然后为每个字段添加输入框（带有匹配的标签）。
步骤2：添加CSS。
使用与上面示例相同的CSS，但进行某些弹出框的修改：
示例：
<!DOCTYPE html>
<html>
<style>
/*add full-width input fields*/
input[type=text],
input[type=password] {
width: 100%;
padding: 12px 20px;
margin: 8px 0;
display: inline-block;
border: 2px solid #ccc;
box-sizing: border-box;
}
/* set a style for all buttons*/
button {
background-color: green;
color: white;
padding: 14px 20px;
margin: 8px 0;
cursor: pointer;
width: 100%;
}
/*set styles for the cancel button*/
.cancelbtn {
padding: 14px 20px;
background-color: #FF2E00;
}
/*float cancel and signup buttons and add an equal width*/
.cancelbtn,
.signupbtn {
float: left;
width: 50%
}
/*add padding to container elements*/
.container {
padding: 16px;
}
/*define the modal’s background*/
.modal {
display: none;
position: fixed;
z-index: 1;
left: 0;
top: 0;
width: 100%;
height: 100%;
overflow: auto;
background-color: rgb(0, 0, 0);
background-color: rgba(0, 0, 0, 0.4);
padding-top: 60px;
}
/*define the modal-content background*/
.modal-content {
background-color: #fefefe;
margin: 5% auto 15% auto;
border: 1px solid #888;
width: 80%;
}
/*define the close button*/
.close {
position: absolute;
right: 35px;
top: 15px;
color: #000;
font-size: 40px;
font-weight: bold;
}
/*define the close hover and focus effects*/
.close:hover,
.close:focus {
color: red;
cursor: pointer;
}
.clearfix::after {
content: "";
clear: both;
display: table;
}
@media screen and (max-width: 600px) {
.cancelbtn,
.signupbtn {
width: 100%;
}
}
</style>
<body>
<h2>Modal Signup Form</h2>
<!--Step 1:Adding HTML-->
<button onclick="document.getElementById('id01').style.display='block'" style="width:auto;">Sign Up</button>
<div id="id01" class="modal">
<span onclick="document.getElementById('id01').style.display='none'" class="close" title="Close Modal">×</span>
<form class="modal-content animate" action="/action_page.php">
<div class="container">
<label><b>Email</b></label>
<input type="text" placeholder="Enter Email" name="email" required>
<label><b>Password</b></label>
<input type="password" placeholder="Enter Password" name="psw" required>
<label><b>Repeat Password</b></label>
<input type="password" placeholder="Repeat Password" name="psw-repeat" required>
<input type="checkbox"> Remember me
<p>By creating an account you agree to our <a href="#">Terms & Privacy</a>.</p>
<div class="clearfix">
<button type="button" onclick="document.getElementById('id01').style.display='none'" class="cancelbtn">Cancel</button>
<button type="submit" class="signupbtn">Sign Up</button>
</div>
</div>
</form>
</div>
<!--close the modal by just clicking outside of the modal-->
<script>
var modal = document.getElementById('id01');
window.onclick = function(event) {
if (event.target == modal) {
modal.style.display = "none";
}
}
</script>
</body>
</html>
输出：
