完全沒用過javascript,不知道要如何開始
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.5/font/bootstrap-icons.css">
<link rel="stylesheet" href="layout.css">
<link rel="stylesheet" href="styles.css">
<style>
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }
    body {
        width: 100%;
        max-width: 1200px;
        margin: 0 auto;
        font-family: Arial, sans-serif;
        /*position: relative;*/
    }
    header {
        background-color: white;
        height: 140px;
        position: relative;
    }
    header .dropbtn {
        font-size: 18px;
    }
    .sticky-header {
        padding: 10px;
        text-align: center;
        position: fixed;
        width: 85%;
        top: 0;
        z-index: 1;
        /* 确保标题在内容之上 */
    }
    .scrolling-content {
        padding: 20px;
        margin-top: 50px;
        /* 为内容留出标题的空间 */
        overflow-y: scroll;
        /* 让内容区域可以滚动 */
        height: calc(100vh - 50px);
        /* 设置内容区域高度,确保内容在标题下面 */
    }
    header img {
        border: white;
        width: 100px;
        height: 100px;
    }
    header .dropdown {
        /*background-color: rgb(242, 255 ,0);*/
        right: -245px;
        bottom: -80px;
    }
    /*header nav a{
            background-color: darkblue;
            color: #fff;
            font-size: 18px;
            letter-spacing: 1px;
            padding: 10px 20px;
            display: block;
            float: left;
            text-decoration: none;
            border-radius: 8px 8px 0 0;
            border: 1px solid red;
            margin: 0 3px;
            margin-top: 20px; 
        }*/
    header .dropdown-content a {
        background-color: white;
        color: black;
        font-size: 12px;
        letter-spacing: 2px;
        padding: 10px 12px;
        border-radius: 8px 8px 0 0;
        margin-left: 5px;
        transition: .2s;
    }
    header .dropdown-content a:hover {
        padding-bottom: 30px;
    }
    body>nav {
        background-color: white;
        color: #fff;
        height: 60px;
        position: sticky;
        top: 0;
    }
    main {
        background-color: white;
        overflow: hidden;
        display: flex;
        justify-content: center;
        margin-top: 400px;
    }
    aside {
        display: flex;
        justify-content: space-between;
    }
    aside a {
        text-align: right;
    }
    main aside {
        background-color: white;
        float: right;
        width: 20%;
        padding: 10px;
    }
    main video {
        width: 80%;
        display: block;
        margin: 0 auto;
    }
    .content {
        background-color: white;
        width: 80%;
        padding: 20px;
        margin: 4%;
    }
    .content img {
        display: block;
        margin-bottom: 20px;
    }
    .content h1 {
        font-size: 2em;
        margin: 0 0 20px;
        margin-top: 20px;
    }
    .content figure {
        letter-spacing: 1px;
        line-height: 1.5;
        text-align: justify;
        margin-top: 3px;
    }
    .gomore {
        background-color: white;
        color: black;
        padding: 8px;
        border: none;
        font-size: 18px;
        letter-spacing: 2px;
        padding: 10px 12px;
        border-radius: 8px 8px 0 0;
    }
    footer {
        background-color: darkblue;
        color:#fff;
        text-align: center;
        padding: 1em;
    }
    .footer-content{
        margin-left: 20px;
    }
    img {
        width: 25%;
        height: 300px;
        margin-top: auto;
        margin-bottom: auto;
        float: left;
    }
    /* 按鈕樣式 */
    .dropbtn {
        background-color: white;
        color: black;
        padding: 10px 10px;
        border: none;
    }
    .dropbtn img {
        width: 15px;
        height: 15px;
        float: right;
        margin-top: auto;
        margin-bottom: auto;
    }
    /* 下拉菜單容器 */
    .dropdown {
        position: relative;
        display: inline-block;
    }
    /* 下拉菜單內容(隱藏起來) */
    .dropdown-content {
        display: none;
        position: absolute;
        background-color: #f1f1f1;
        min-width: 160px;
        box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
        z-index: 1;
    }
    /* 下拉菜單內容中的選項 */
    .dropdown-content a {
        padding: 12px 16px;
        text-align: left;
        text-decoration: none;
        display: block;
    }
    /* 滑鼠懸停時,顯示下拉菜單內容 */
    .dropdown:hover .dropdown-content {
        display: block;
    }
</style>
        <!-- 左右方向鍵 -->
        <button class="carousel-control-prev" type="button" data-bs-target="#sec1Slider" data-bs-slide="prev">
            <span class="carousel-control-prev-icon" aria-hidden="true"></span>
            <span class="visually-hidden">Previous</span>
        </button>
        <button class="carousel-control-next" type="button" data-bs-target="#sec1Slider" data-bs-slide="next">
            <span class="carousel-control-next-icon" aria-hidden="true"></span>
            <span class="visually-hidden">Next</span>
        </button>
        <!-- 換頁控制器 -->
        <div class="carousel-indicators">
            <button type="button" data-bs-target="#sec1Slider" data-bs-slide-to="0" class="active"
                aria-current="true" aria-label="Slide 1"></button>
            <button type="button" data-bs-target="#sec1Slider" data-bs-slide-to="1" aria-label="Slide 2"></button>
            <button type="button" data-bs-target="#sec1Slider" data-bs-slide-to="2" aria-label="Slide 3"></button>
            <button type="button" data-bs-target="#sec1Slider" data-bs-slide-to="3" aria-label="Slide 3"></button>
        </div>
    </div>
</section>
<header class="sticky-header">
    <div class="header">
        <img src="./images/02.png" alt="./images/02.png">
    </div>
    <div class="dropdown">
        <button class="dropbtn">
            <a class="gomore" href="https://www.itsesg.com/" target="_blank">首頁</a>
        </button>
    </div>
    <div class="dropdown">
        <button class="dropbtn">
            產品介紹
        </button>
        <div class="dropdown-content">
            <a href="test003.html">BAS建築自動化系統</a>
            <a href="test004.html">雲管家物管系統</a>
            <a href="text005.html">AI智能影像辨識系統</a>
            <a href="text006.html">智慧綠建築顧問</a>
            <a href="text007.html">健康建築顧問</a>
        </div>
    </div>
    <div class="dropdown">
        <button class="dropbtn">
            專案
        </button>
        <div class="dropdown-content">
            <a href="text008.html">成功案例</a>
            <a href="text008.html">團隊證照</a>
            <a href="text008.html">專業顧問群</a>
        </div>
    </div>
    <div class="dropdown">
        <button class="dropbtn">
            聯絡我們
        </button>
        <div class="dropdown-content">
            <a class="gomore" href="test002.html" target="_blank">聯絡我們</a>
        </div>
    </div>
</header>
<main class="scrol-+ling-content">
    <div class="content">
        <hr class="my-4">
        <div class="row">
            <div class="col-lg-4 col-sm-6 mb-3">
                <div class="card">
                    <img class="card-img-top" src="images/01.jpg" alt="./images/01.jpg">
                    <div class="card-body">
                        <h5 class="card-title text_limit2">BAS建築自動化系統</h5>
                        <a href="test003.html" class="btn btn-primary">More...</a>
                    </div>
                </div>
            </div>
            <div class="col-lg-4 col-sm-6 mb-3">
                <div class="card">
                    <img class="card-img-top" src="images/07.jpg" alt="./images/07.jpg">
                    <div class="card-body">
                        <h5 class="card-title text_limit2">雲管家物管系統</h5>
                        <a href="test004.html" class="btn btn-primary">More...</a>
                    </div>
                </div>
            </div>
            <div class="col-lg-4 col-sm-6 mb-3">
                <div class="card">
                    <img class="card-img-top" src="images/08.jpg" alt="./images/08.jpg">
                    <div class="card-body">
                        <h5 class="card-title text_limit2">AI智能影像辨識系統</h5>
                        <a href="text005.html" class="btn btn-primary">More...</a>
                    </div>
                </div>
            </div>
            <div class="col-lg-4 col-sm-6 mb-3">
                <div class="card">
                    <img class="card-img-top" src="images/09.jpg" alt="./images/09.jpg">
                    <div class="card-body">
                        <h5 class="card-title text_limit2">智慧綠建築顧問</h5>
                        <a href="text006.html" class="btn btn-primary">More...</a>
                    </div>
                </div>
            </div>
            <div class="col-lg-4 col-sm-6 mb-3">
                <div class="card">
                    <div class="card-body">
                        <h5 class="card-title text_limit2">健康建築顧問</h5>
                        <a href="text007.html" class="btn btn-primary">More...</a>
                    </div>
                </div>
            </div>
        </div>
        <h1>ITsESG 官網影片</h1>
        <video id="test" controls width="640" height="360">
            <source src="001.mp4" type="video/mp4">
        </video>
</main>
<script src="script.js"></script>
<footer>
    <p>Copyright ©2023 ITsESG Corporation 版權所有</p>
    <footer id="footer">
        <div class="container">
            <div class="row">
                <div class="col-12 col-md-10 col-lg-10">
                    <div class="footer-content">
                        <ul>
                            <li><a href="text009.html">About Us</a></li>
    </footer>
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.1/dist/js/bootstrap.bundle.min.js"
        integrity="sha384-/bQdsTh/da6pkI1MST/rWKFNjaCP5gBSY4sEBT38Q/9RBh9AH40zEOg7Hlq2THRZ"
        crossorigin="anonymous"></script>
    <script src="https://code.jquery.com/jquery-3.7.0.min.js"
        integrity="sha256-o88AwQnZB+VDvE9tvIXrMQaPlFFSUTR+nldQm1LuPXQ=" crossorigin="anonymous"></script>
學任何語言, 一定都先從 Hello World 開始:
https://v1.vuejs.org/guide/
下一個挑戰通常是九九乘法表:
用 Vue 寫出九九乘法表
至少有個工具書在手上:
Vue 入門
或許也要去了解一下, 它的前世今生:
重新認識 Vue.js
以上都熟練了之後, 才來開始寫你自己的專案....
看起來臨時要套框架應該不是你自己決定的,那就從最基本的開始說起吧
在 Vue 裡面第一步是會把你所指定的內容轉換成 Vurtual DOM 來執行,因此你需要的是將 html 的元件內容包覆進去,若是用 CDN 導入的建議去看一下 #app 跟 el/mount() 的關係
那至於使用 jQuery 與 bootstrap 的專案臨時要轉到 Vue 會因為生命週期的問題改一點寫法,這可能要跟你們家大頭詢問必要性了,若是個人學習建議先搞懂 Vue 在做什麼以及什麼時候需要用它再開始吧