使用JavaScript实现的留言板实例

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本项目为一个基于JavaScript技术构建的简单留言板应用实例。用户可以轻松地发表留言和浏览其他用户的评论内容，界面简洁友好，功能实用。本段落介绍了一个简单的JavaScript留言板案例的实现细节，供学习参考。在该应用中，用户可以输入姓名与留言，并将这些内容显示到页面上。此示例主要涉及HTML、CSS及JavaScript的结合使用，具体涵盖以下几点： 1. **HTML 结构**：通过``定义了网页的基础框架；``部分包含了字符集设定和标题信息；而用户输入框与提交按钮等交互元素则放置于``标签内。此外，利用`

`、``及`

`等标记来构建页面布局。

2. **CSS 样式**：通过内部样式表定义了网页中各组件的外观属性，如留言显示区域的颜色和大小设定以及删除按钮的文字颜色与下划线效果。

3. **JavaScript 事件处理**：利用JavaScript获取DOM元素，并添加点击事件监听器以响应用户操作。例如，当提交按钮被点击时触发特定函数执行相应的逻辑来增加新的留言信息到页面上。

4. **动态内容生成和删除**：通过创建新的HTML元素并设置其属性（如文本与样式），然后将这些新元素追加至DOM树中实现留言板功能的更新。同时，提供了一个机制让用户能够移除已发布的评论或消息。

5. **用户交互体验**：整个过程中强调了即时反馈的重要性——用户的输入会立刻显示在网页上，并且提供了删除留言的功能，增强了用户体验和互动性。

这个案例展示了如何整合HTML、CSS与JavaScript来创建具备基本动态特性的Web应用。它涵盖了获取DOM元素、添加事件处理程序以及操作页面内容等关键技能点，为开发者深入学习前端开发打下了坚实的基础。
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                                    本项目为一个基于JavaScript技术构建的简单留言板应用实例。用户可以轻松地发表留言和浏览其他用户的评论内容，界面简洁友好，功能实用。

本段落介绍了一个简单的JavaScript留言板案例的实现细节，供学习参考。

在该应用中，用户可以输入姓名与留言，并将这些内容显示到页面上。此示例主要涉及HTML、CSS及JavaScript的结合使用，具体涵盖以下几点：

1. **HTML 结构**：通过`<html>`定义了网页的基础框架；`<head>`部分包含了字符集设定和标题信息；而用户输入框与提交按钮等交互元素则放置于`<body>`标签内。此外，利用`<div>`、`<input>`及`<textarea>`等标记来构建页面布局。

2. **CSS 样式**：通过内部样式表定义了网页中各组件的外观属性，如留言显示区域的颜色和大小设定以及删除按钮的文字颜色与下划线效果。

这个案例展示了如何整合HTML、CSS与JavaScript来创建具备基本动态特性的Web应用。它涵盖了获取DOM元素、添加事件处理程序以及操作页面内容等关键技能点，为开发者深入学习前端开发打下了坚实的基础。
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                                    本项目采用JavaScript技术开发，实现了一个简易但功能齐全的留言板系统。用户可以轻松发表评论、查看其他用户的留言并进行互动交流，增强了网站的社区属性和用户体验。

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                                       title="<span style=color: #f73131>使</span><span style=color: #f73131>用</span><span style=color: #f73131>JavaScript</span><span style=color: #f73131>实</span><span style=color: #f73131>现</span><span style=color: #f73131>留</span><span style=color: #f73131>言</span><span style=color: #f73131>板</span>功能"
                                       href="https://d.itadn.com/i0_13904275454/B/776411" target="_blank"><span style=color: #f73131>使</span><span style=color: #f73131>用</span><span style=color: #f73131>JavaScript</span><span style=color: #f73131>实</span><span style=color: #f73131>现</span><span style=color: #f73131>留</span><span style=color: #f73131>言</span><span style=color: #f73131>板</span>功能</a>
                                </div>
                                <div data-v-abd0b829="" class="col-start-9 col-end-10" style="float: left;"><span
                                        data-v-abd0b829="" class="onestyle">优质</span></div>
                                <div data-v-abd0b829=""
                                     class="col-start-2 col-end-9 p-1 text-gray-500 text-xs font-normal dark:text-white">
                                    <div data-v-abd0b829="" class="min-h-8 max-h-8 overflow-hidden ...">
                                    本项目利用JavaScript语言实现了一个简单的留言板功能，用户可以轻松地发表和查看留言信息。通过前端技术实现了与用户的互动交流界面。

每天一个JS小demo之留言板。主要知识点：DOM方法的理解和运用。

```html
<!DOCTYPE html>
<html lang=en>
<head>
<meta charset=UTF-8>
<title>Document</title>
<style type=text/css>
.wrap {width: 400px;margin: 30px auto;}
textarea {display: block;width: 100%;height: 60px;}
input {display: block;width: 60%;margin: 15px auto}
</style>
```
                                    </div>  
                                </div>
                            </li>

<li data-v-abd0b829=""
                                class="border-solid border-2 border-gray-300 dark:border-gray-600 grid auto-rows-min grid-cols-9 hover:bg-gray-100 hover:rounded-lg dark:hover:bg-gray-700 listyle"
                                style="cursor: pointer;">
                                <div data-v-abd0b829=""
                                     class="col-start-1 pt-1 col-end-2 row-span-2 place-self-center imgsize">
                                    <svg data-v-abd0b829="" t="1721980773527" class="icon" viewBox="0 0 1024 1024"
                                         version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="26446" width="55"
                                         height="110">
                                        <path data-v-abd0b829=""
                                              d="M834.6624 409.6a40.8576 40.8576 0 0 0-13.7728-30.63808l-254.32064-254.32064a40.87296 40.87296 0 0 0-31.1552-11.84768c-0.97792-0.07168-1.9456-0.1536-2.93376-0.1536H230.4a40.96 40.96 0 0 0-40.96 40.96v716.8a40.96 40.96 0 0 0 40.96 40.96h563.2a40.96 40.96 0 0 0 40.96-40.96V419.84c0-1.62304-0.11776-3.21536-0.3072-4.79232a40.6528 40.6528 0 0 0 0.4096-5.44768zM578.56 252.48256L694.71744 368.64H578.56V252.48256zM271.36 829.44V194.56h225.28v215.04a40.96 40.96 0 0 0 40.96 40.96h215.04v378.88H271.36z"
                                              p-id="26447" fill="#707070"></path>
                                        <path data-v-abd0b829=""
                                              d="M371.2 660.48h133.12a40.96 40.96 0 0 0 0-81.92h-133.12a40.96 40.96 0 0 0 0 81.92zM650.24 696.32H363.52a40.96 40.96 0 0 0 0 81.92h286.72a40.96 40.96 0 0 0 0-81.92z"
                                              p-id="26448" fill="#707070"></path>
                                    </svg>
                                </div>
                                <div data-v-abd0b829=""
                                     class="col-start-2 p-1 col-end-8 items-center sm:flex text-base font-normal pt-1 text-gray-900 dark:text-white min-h-13 max-h-13 overflow-hidden">
                                    <a data-v-abd0b829="" class="min-h-12 max-h-12 overflow-hidden ..."
                                       title="<span style=color: #f73131>使</span><span style=color: #f73131>用</span><span style=color: #f73131>JavaScript</span><span style=color: #f73131>实</span><span style=color: #f73131>现</span>网页<span style=color: #f73131>留</span><span style=color: #f73131>言</span><span style=color: #f73131>板</span>功能"
                                       href="https://d.itadn.com/i0_28585877045/B/1285622" target="_blank"><span style=color: #f73131>使</span><span style=color: #f73131>用</span><span style=color: #f73131>JavaScript</span><span style=color: #f73131>实</span><span style=color: #f73131>现</span>网页<span style=color: #f73131>留</span><span style=color: #f73131>言</span><span style=color: #f73131>板</span>功能</a>
                                </div>
                                <div data-v-abd0b829="" class="col-start-9 col-end-10" style="float: left;"><span
                                        data-v-abd0b829="" class="onestyle">优质</span></div>
                                <div data-v-abd0b829=""
                                     class="col-start-2 col-end-9 p-1 text-gray-500 text-xs font-normal dark:text-white">
                                    <div data-v-abd0b829="" class="min-h-8 max-h-8 overflow-hidden ...">
                                    本项目采用JavaScript技术开发，旨在创建一个互动性强、用户体验佳的网页留言板。用户可以轻松发表留言并查看其他用户的评论，增强网站社区氛围。

在使用网页进行浏览时，经常会看到人们发表留言的地方。那么发布留言的留言板是如何制作出来的呢？

这里我们来创建一个简单的留言板。

首先需要添加一个textarea文本框，并在其旁边放置一个按钮。此外还需要用到一个ul标签，在这个标签内暂时不需要放入任何li元素，可以通过CSS对其进行一些基本的美化处理。
接下来要做的就是获取这些HTML元素了，在点击提交留言的按钮后，程序会创建一个新的li元素，并将textarea中的内容赋值给该li，最后再把新创建的li插入到ul的第一个子节点之前。
                                    </div>  
                                </div>
                            </li>

<li data-v-abd0b829=""
                                class="border-solid border-2 border-gray-300 dark:border-gray-600 grid auto-rows-min grid-cols-9 hover:bg-gray-100 hover:rounded-lg dark:hover:bg-gray-700 listyle"
                                style="cursor: pointer;">
                                <div data-v-abd0b829=""
                                     class="col-start-1 pt-1 col-end-2 row-span-2 place-self-center imgsize">
                                    <svg data-v-abd0b829="" t="1721980773527" class="icon" viewBox="0 0 1024 1024"
                                         version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="26446" width="55"
                                         height="110">
                                        <path data-v-abd0b829=""
                                              d="M834.6624 409.6a40.8576 40.8576 0 0 0-13.7728-30.63808l-254.32064-254.32064a40.87296 40.87296 0 0 0-31.1552-11.84768c-0.97792-0.07168-1.9456-0.1536-2.93376-0.1536H230.4a40.96 40.96 0 0 0-40.96 40.96v716.8a40.96 40.96 0 0 0 40.96 40.96h563.2a40.96 40.96 0 0 0 40.96-40.96V419.84c0-1.62304-0.11776-3.21536-0.3072-4.79232a40.6528 40.6528 0 0 0 0.4096-5.44768zM578.56 252.48256L694.71744 368.64H578.56V252.48256zM271.36 829.44V194.56h225.28v215.04a40.96 40.96 0 0 0 40.96 40.96h215.04v378.88H271.36z"
                                              p-id="26447" fill="#707070"></path>
                                        <path data-v-abd0b829=""
                                              d="M371.2 660.48h133.12a40.96 40.96 0 0 0 0-81.92h-133.12a40.96 40.96 0 0 0 0 81.92zM650.24 696.32H363.52a40.96 40.96 0 0 0 0 81.92h286.72a40.96 40.96 0 0 0 0-81.92z"
                                              p-id="26448" fill="#707070"></path>
                                    </svg>
                                </div>
                                <div data-v-abd0b829=""
                                     class="col-start-2 p-1 col-end-8 items-center sm:flex text-base font-normal pt-1 text-gray-900 dark:text-white min-h-13 max-h-13 overflow-hidden">
                                    <a data-v-abd0b829="" class="min-h-12 max-h-12 overflow-hidden ..."
                                       title="<span style=color: #f73131>使</span><span style=color: #f73131>用</span>JSP<span style=color: #f73131>实</span><span style=color: #f73131>现</span>简易<span style=color: #f73131>留</span><span style=color: #f73131>言</span><span style=color: #f73131>板</span>"
                                       href="https://d.itadn.com/i0_74448084127/B/403643" target="_blank"><span style=color: #f73131>使</span><span style=color: #f73131>用</span>JSP<span style=color: #f73131>实</span><span style=color: #f73131>现</span>简易<span style=color: #f73131>留</span><span style=color: #f73131>言</span><span style=color: #f73131>板</span></a>
                                </div>
                                <div data-v-abd0b829="" class="col-start-9 col-end-10" style="float: left;"><span
                                        data-v-abd0b829="" class="onestyle">优质</span></div>
                                <div data-v-abd0b829=""
                                     class="col-start-2 col-end-9 p-1 text-gray-500 text-xs font-normal dark:text-white">
                                    <div data-v-abd0b829="" class="min-h-8 max-h-8 overflow-hidden ...">
                                    本项目采用Java Server Pages(JSP)技术构建了一个功能简单的在线留言系统，用户可以方便地发表和查看评论。

本资源可用！使用JSP、JavaBean和Servlet实现了一个简单的留言板设计，包括数据库，并附有运行后的部分截图。
                                    </div>  
                                </div>
                            </li>

<li data-v-abd0b829=""
                                class="border-solid border-2 border-gray-300 dark:border-gray-600 grid auto-rows-min grid-cols-9 hover:bg-gray-100 hover:rounded-lg dark:hover:bg-gray-700 listyle"
                                style="cursor: pointer;">
                                <div data-v-abd0b829=""
                                     class="col-start-1 pt-1 col-end-2 row-span-2 place-self-center imgsize">
                                    <svg data-v-abd0b829="" t="1721980773527" class="icon" viewBox="0 0 1024 1024"
                                         version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="26446" width="55"
                                         height="110">
                                        <path data-v-abd0b829=""
                                              d="M834.6624 409.6a40.8576 40.8576 0 0 0-13.7728-30.63808l-254.32064-254.32064a40.87296 40.87296 0 0 0-31.1552-11.84768c-0.97792-0.07168-1.9456-0.1536-2.93376-0.1536H230.4a40.96 40.96 0 0 0-40.96 40.96v716.8a40.96 40.96 0 0 0 40.96 40.96h563.2a40.96 40.96 0 0 0 40.96-40.96V419.84c0-1.62304-0.11776-3.21536-0.3072-4.79232a40.6528 40.6528 0 0 0 0.4096-5.44768zM578.56 252.48256L694.71744 368.64H578.56V252.48256zM271.36 829.44V194.56h225.28v215.04a40.96 40.96 0 0 0 40.96 40.96h215.04v378.88H271.36z"
                                              p-id="26447" fill="#707070"></path>
                                        <path data-v-abd0b829=""
                                              d="M371.2 660.48h133.12a40.96 40.96 0 0 0 0-81.92h-133.12a40.96 40.96 0 0 0 0 81.92zM650.24 696.32H363.52a40.96 40.96 0 0 0 0 81.92h286.72a40.96 40.96 0 0 0 0-81.92z"
                                              p-id="26448" fill="#707070"></path>
                                    </svg>
                                </div>
                                <div data-v-abd0b829=""
                                     class="col-start-2 p-1 col-end-8 items-center sm:flex text-base font-normal pt-1 text-gray-900 dark:text-white min-h-13 max-h-13 overflow-hidden">
                                    <a data-v-abd0b829="" class="min-h-12 max-h-12 overflow-hidden ..."
                                       title="<span style=color: #f73131>使</span><span style=color: #f73131>用</span>Vue<span style=color: #f73131>实</span><span style=color: #f73131>现</span>简易<span style=color: #f73131>留</span><span style=color: #f73131>言</span><span style=color: #f73131>板</span>"
                                       href="https://d.itadn.com/i0_11633324850/B/776719" target="_blank"><span style=color: #f73131>使</span><span style=color: #f73131>用</span>Vue<span style=color: #f73131>实</span><span style=color: #f73131>现</span>简易<span style=color: #f73131>留</span><span style=color: #f73131>言</span><span style=color: #f73131>板</span></a>
                                </div>
                                <div data-v-abd0b829="" class="col-start-9 col-end-10" style="float: left;"><span
                                        data-v-abd0b829="" class="onestyle">优质</span></div>
                                <div data-v-abd0b829=""
                                     class="col-start-2 col-end-9 p-1 text-gray-500 text-xs font-normal dark:text-white">
                                    <div data-v-abd0b829="" class="min-h-8 max-h-8 overflow-hidden ...">
                                    本项目采用Vue框架构建了一个功能简洁但实用的在线留言系统，用户可以轻松地发布、查看及回复评论。

本段落实例展示了如何使用Vue实现一个简单的留言板功能，供参考。

```html
<!DOCTYPE html>
<html>
<head>
    <meta charset=utf-8>
    <title></title>
    <link rel=stylesheet type=text/css href=css/bootstrap.css/>
</head>
<body style=padding-left: 10px;>
<div id=app style=width: 400px; height: auto;></div>
<script src=js/vue.js></script>
<script src=js/axios.min.js></script>
<script type=text/javascript>
    // Vue实例代码
</script>
</body>
</html>
```
                                    </div>  
                                </div>
                            </li>

<li data-v-abd0b829=""
                                class="border-solid border-2 border-gray-300 dark:border-gray-600 grid auto-rows-min grid-cols-9 hover:bg-gray-100 hover:rounded-lg dark:hover:bg-gray-700 listyle"
                                style="cursor: pointer;">
                                <div data-v-abd0b829=""
                                     class="col-start-1 pt-1 col-end-2 row-span-2 place-self-center imgsize">
                                    <svg data-v-abd0b829="" t="1721980773527" class="icon" viewBox="0 0 1024 1024"
                                         version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="26446" width="55"
                                         height="110">
                                        <path data-v-abd0b829=""
                                              d="M834.6624 409.6a40.8576 40.8576 0 0 0-13.7728-30.63808l-254.32064-254.32064a40.87296 40.87296 0 0 0-31.1552-11.84768c-0.97792-0.07168-1.9456-0.1536-2.93376-0.1536H230.4a40.96 40.96 0 0 0-40.96 40.96v716.8a40.96 40.96 0 0 0 40.96 40.96h563.2a40.96 40.96 0 0 0 40.96-40.96V419.84c0-1.62304-0.11776-3.21536-0.3072-4.79232a40.6528 40.6528 0 0 0 0.4096-5.44768zM578.56 252.48256L694.71744 368.64H578.56V252.48256zM271.36 829.44V194.56h225.28v215.04a40.96 40.96 0 0 0 40.96 40.96h215.04v378.88H271.36z"
                                              p-id="26447" fill="#707070"></path>
                                        <path data-v-abd0b829=""
                                              d="M371.2 660.48h133.12a40.96 40.96 0 0 0 0-81.92h-133.12a40.96 40.96 0 0 0 0 81.92zM650.24 696.32H363.52a40.96 40.96 0 0 0 0 81.92h286.72a40.96 40.96 0 0 0 0-81.92z"
                                              p-id="26448" fill="#707070"></path>
                                    </svg>
                                </div>
                                <div data-v-abd0b829=""
                                     class="col-start-2 p-1 col-end-8 items-center sm:flex text-base font-normal pt-1 text-gray-900 dark:text-white min-h-13 max-h-13 overflow-hidden">
                                    <a data-v-abd0b829="" class="min-h-12 max-h-12 overflow-hidden ..."
                                       title="<span style=color: #f73131>使</span><span style=color: #f73131>用</span><span style=color: #f73131>JavaScript</span>操作Sql Server<span style=color: #f73131>的</span><span style=color: #f73131>留</span><span style=color: #f73131>言</span><span style=color: #f73131>板</span>"
                                       href="https://d.itadn.com/i0_40152885298/B/236738" target="_blank"><span style=color: #f73131>使</span><span style=color: #f73131>用</span><span style=color: #f73131>JavaScript</span>操作Sql Server<span style=color: #f73131>的</span><span style=color: #f73131>留</span><span style=color: #f73131>言</span><span style=color: #f73131>板</span></a>
                                </div>
                                <div data-v-abd0b829="" class="col-start-9 col-end-10" style="float: left;"><span
                                        data-v-abd0b829="" class="onestyle">优质</span></div>
                                <div data-v-abd0b829=""
                                     class="col-start-2 col-end-9 p-1 text-gray-500 text-xs font-normal dark:text-white">
                                    <div data-v-abd0b829="" class="min-h-8 max-h-8 overflow-hidden ...">
                                    本项目为一个基于JavaScript和SQL Server技术实现的留言板系统，用户可以轻松发表留言并保存至数据库中。

使用JavaScript操作Sql Server的留言板代码示例仅用于学习目的。
需要注意的是，通过JavaScript直接访问SQL数据库是不安全的做法，因为他人可以直接从JS文件中获取到数据库账户信息。

具体资料可以在项目中的ReadMe.html文件查看。
参考页面: http://www.fly124.cn/book/index.asp
此项目的功能与上述链接所示效果相同。如有需要，请下载并使用；如满意请给予评价。
                                    </div>  
                                </div>
                            </li>

<li data-v-abd0b829=""
                                class="border-solid border-2 border-gray-300 dark:border-gray-600 grid auto-rows-min grid-cols-9 hover:bg-gray-100 hover:rounded-lg dark:hover:bg-gray-700 listyle"
                                style="cursor: pointer;">
                                <div data-v-abd0b829=""
                                     class="col-start-1 pt-1 col-end-2 row-span-2 place-self-center imgsize">
                                    <svg data-v-abd0b829="" t="1721980773527" class="icon" viewBox="0 0 1024 1024"
                                         version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="26446" width="55"
                                         height="110">
                                        <path data-v-abd0b829=""
                                              d="M834.6624 409.6a40.8576 40.8576 0 0 0-13.7728-30.63808l-254.32064-254.32064a40.87296 40.87296 0 0 0-31.1552-11.84768c-0.97792-0.07168-1.9456-0.1536-2.93376-0.1536H230.4a40.96 40.96 0 0 0-40.96 40.96v716.8a40.96 40.96 0 0 0 40.96 40.96h563.2a40.96 40.96 0 0 0 40.96-40.96V419.84c0-1.62304-0.11776-3.21536-0.3072-4.79232a40.6528 40.6528 0 0 0 0.4096-5.44768zM578.56 252.48256L694.71744 368.64H578.56V252.48256zM271.36 829.44V194.56h225.28v215.04a40.96 40.96 0 0 0 40.96 40.96h215.04v378.88H271.36z"
                                              p-id="26447" fill="#707070"></path>
                                        <path data-v-abd0b829=""
                                              d="M371.2 660.48h133.12a40.96 40.96 0 0 0 0-81.92h-133.12a40.96 40.96 0 0 0 0 81.92zM650.24 696.32H363.52a40.96 40.96 0 0 0 0 81.92h286.72a40.96 40.96 0 0 0 0-81.92z"
                                              p-id="26448" fill="#707070"></path>
                                    </svg>
                                </div>
                                <div data-v-abd0b829=""
                                     class="col-start-2 p-1 col-end-8 items-center sm:flex text-base font-normal pt-1 text-gray-900 dark:text-white min-h-13 max-h-13 overflow-hidden">
                                    <a data-v-abd0b829="" class="min-h-12 max-h-12 overflow-hidden ..."
                                       title="Java<span style=color: #f73131>实</span><span style=color: #f73131>现</span><span style=color: #f73131>的</span><span style=color: #f73131>留</span><span style=color: #f73131>言</span><span style=color: #f73131>板</span>"
                                       href="https://d.itadn.com/i0_16498822152/B/25546" target="_blank">Java<span style=color: #f73131>实</span><span style=color: #f73131>现</span><span style=color: #f73131>的</span><span style=color: #f73131>留</span><span style=color: #f73131>言</span><span style=color: #f73131>板</span></a>
                                </div>
                                <div data-v-abd0b829="" class="col-start-9 col-end-10" style="float: left;"><span
                                        data-v-abd0b829="" class="onestyle">优质</span></div>
                                <div data-v-abd0b829=""
                                     class="col-start-2 col-end-9 p-1 text-gray-500 text-xs font-normal dark:text-white">
                                    <div data-v-abd0b829="" class="min-h-8 max-h-8 overflow-hidden ...">
                                    本项目为一个基于Java技术实现的在线留言板系统，用户可以在此发布和回复留言，分享观点与经历。采用前后端分离架构，提供良好的用户体验。

简易系统留言板的设计与实现采用JavaEE中的servlet、jsp和javabean技术。
                                    </div>  
                                </div>
                            </li>

<li data-v-abd0b829=""
                                class="border-solid border-2 border-gray-300 dark:border-gray-600 grid auto-rows-min grid-cols-9 hover:bg-gray-100 hover:rounded-lg dark:hover:bg-gray-700 listyle"
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