模态框练习

模态框

html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="modal.css" />
    </head>
    <body>
        <!-- 头部 -->
        <header>
            <h2 class="title">我的博客</h2>
            <button onclick="showModal()">登录</button>
        </header>
        <!-- 模态框 -->
        <div class="modal">
            <!-- 1.半透明的遮罩 -->
            <div class="modal-zz" onclick="closeModal()"></div>
            <!-- 2.弹层表单 -->
            <form action="" class="modal-form">
                <fieldset style="display: grid; gap: 1em">
                    <legend>用户登录</legend>
                    <input type="text" name="username" placeholder="请输入账号" required />
                    <input type="password" name="password" placeholder="密码不少于6位" required />
                    <button>登录</button>
                </fieldset>
            </form>
        </div>
        <script src="modal.js"></script>
    </body>
</html>

css代码

* {
    margin: 0px;
    padding: 0px;
    box-sizing: border-box;
}
/* 头部标题 */
header {
    background-color: #666699;
    padding: 0.5em 1em;
    display: flex;
}
/* logo */
header .title {
    font-weight: bold;
    font-style: italic;
    color: white;
    letter-spacing: 10px;
    text-shadow: 1px 1px 1px #555;
}
/* 登录按钮 */
header button {
    margin-left: auto;
    width: 5em;
    border: none;
    border-radius: 5px;
}
header button:hover {
    cursor: pointer;
    background-color: blue;
    color: #fff;
    box-shadow: 0 0 5px #fff;
    transition: 0.3s;
}
header button:active {
    cursor: pointer;
    background-color: red;
    color: #fff;
}
/* 模态框 */
.modal .modal-form fieldset {
    height: 15.5em;
    background-color: lightcyan;
    border: none;
    padding: 2em 3em;
    box-shadow: 0 0 5px #888;
    width: 400px;
}
/* 模态框表单标题 */
.modal .modal-form fieldset legend {
    padding: 7px 1.5em;
    background-color: #009966;
    color: white;
    border-radius: 5px;
}
.modal .modal-form fieldset input {
    height: 3em;
    margin: 1px;
    padding-left: 1em;
    outline: none;
    border: 1px solid #ddd;
    font-size: 14px;
    border-radius: 2px;
}
.modal .modal-form fieldset input:focus {
    box-shadow: 1px 1px 5px #888;
    border: none;
    /* border: 1px solid blue; */
}
.modal .modal-form fieldset button {
    background-color: #009966;
    color: white;
    border: none;
    height: 3em;
    font-size: 16px;
    height: 2.5em;
    border-radius: 5px;
}
.modal .modal-form fieldset button:hover {
    background-color: coral;
    transition: 0.3s;
    cursor: pointer;
    box-shadow: 0 0 5px #888;
}
/* 定位 */
.modal .modal-form {
    position: fixed;
    left: calc((100% - 400px) / 2);
    top: calc((100% - 15.5em) / 2);
}
/* 遮罩 */
.modal .modal-zz {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background-color: rgba(0, 0, 0, 0.5);
}
.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';
}

模态框

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