1.模态框

1.效果图

1.

2.

2.代码

 <!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>模态框</title>
    <link rel="stylesheet" href="作业.css">
</head>
<body>
    <header>
        <h1 class="title">xi-blog</h1>
        <button onclick="showmodal()">登录</button>
    </header>
    <div class="modal">
<div class="modal-bg" onclick="closemodal()"></div>
<form action="" class="modal-form">
    <fieldset  style="display: grid; gap: 1em">
        <legend>登录</legend>
<input type="text" name="user" placeholder="请输入用户名" required>
<input type="email" name="email" placeholder="请输入邮箱" required>
<input type="password" name="password" placeholder="请输入密码" required>
<button>登录</button>
<button>注册</button>
    </fieldset>
</form>
    </div>
    <script src="modal.js"></script>
</body>
</html>

css代码

*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
header{
    background-color: lightgreen;
    padding: 1em 1em;
    display: flex;
}
header .title{
    font-size:x-large;
    font-style: italic;
    letter-spacing: 1px;
    color: lightseagreen;
    text-shadow: 1px 1px 1px black;
}
header button{
    margin-left: auto;
    border: none;
    background-color: lightseagreen;
    color: greenyellow;
    width: 5em;
    border-radius: 1em;
}
header button:hover{
    cursor: pointer;
    background-color: black;
    color: white;
    box-shadow: 0 0 3px black;
    transition: 0.3s;
}
.modal .modal-form fieldset{
padding: 2em 2em;
background-color: lightgreen;
height: 19em;
border: 0;
box-shadow: 0 0 10px lightseagreen;
}
.modal .modal-form fieldset legend{
    background-color: lightseagreen;
    color: rebeccapurple;
    padding: 0.5em 1em;
}
.modal .modal-form fieldset input{
    padding-left: 1em;
    font-size: 0.7em;
    outline: none;
    height: 3em;
}
.modal .modal-form fieldset input:focus{
background-color: black;
color: white;
border: 0;
box-shadow:  0 0 2px red;
}
.modal .modal-form fieldset button{
    background-color:black;
    color: white;
    border: 0;
    height: 3em;
    font-size: 10px;
}
.modal .modal-form fieldset button:hover{
    cursor: pointer;
    background-color: white;
    color: black;
}
 /* 
        设置表单组件部分的参数
        设置为绝对定位
        设置具体的定位参数（让其随浏览器变化）
    */
.modal .modal-form{
position: fixed;
top: 20%;
left: 30%;
right: 30%;
}
 /* 
        设置半透明遮罩参数
        设置绝对定位
        定位到四个角 （全覆盖）
        颜色设置为半透明
    */
 .modal .modal-bg{
     position: fixed;
     top: 0;
     left: 0;
     bottom: 0;
     right: 0;
     background-color: rgb(0,0,0,0.5);
 }
 /* 
        将整个模态框隐藏
    */
 .modal{
     display: none;
 }

js 代码

 function showmodal() {
    // 获取模态框元素
    const modal = document.querySelector('.modal');
    // 显示模态框
    modal.style.display = 'block';
    // 焦点自动置入第一个输入框email
    modal.querySelector('input:first-of-type').focus();
}
function closemodal() {
    // 获取模态框元素
    const modal = document.querySelector('.modal');
    // 关闭模态框
    modal.style.display = 'none';
}

简单模态框演示

1.模态框

1.效果图

1.

2.

2.代码

css代码

js 代码

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