在这篇文章中，我们将学习如何限制表单输入文本字段中允许的字符数。我们使用 `` 标签在 HTML 中获取用户输入。为了给输入字段设置限制（或范围），我们使用 `min` 和 `max` 属性，分别用于指定输入字段的最大值和最小值。为了设置输入字段中的最大字符限制，我们使用 `maxlength` 属性。此属性用于指定输入字段中允许输入的最大字符数。为了设置输入字段中的最小字符限制，我们…… 阅读更多

HTML 的 `` 标签用于获取用户输入。要限制输入字段，请使用 `min` 和 `max` 属性，它们分别用于指定输入字段的最大值和最小值。`max` 和 `min` 属性与数字、范围、日期、日期时间、本地日期时间、月份、时间和星期输入类型一起使用。示例您可以尝试运行以下代码来限制 HTML 输入字段：          HTML 数字输入                          请填写 1 到 10 之间的任何数字                                

在这篇文章中，我们将学习如何在 HTML 中换行 `

` 标签内的文本。HTML 的 `
` 标签用于显示预格式化的文本块。预格式化文本是指已经过格式化且不应进一步格式化的文本。`
` 标签也像许多其他 HTML 元素一样需要结束标签 (`
` )。语法以下是 `
` 标签的基本语法。在此处输入文本… 当您通过 `
` 标签在网页上显示文本时，它将按照您编写的格式显示…… 阅读更多 

			

在下面的文章中，我们将学习如何在 HTML 中使用 `

` 标签。`

` 标签是 HTML5 元素之一。它为显示脚本计算的结果或用户与表单元素（`` 标签）交互的结果提供了一个位置。`

` 标签旨在用于复杂的计算，例如货币兑换结果。语法以下是 `

` 标签的语法……内容……使用 `

` 标签进行计算要使用 `

`，您需要了解 JavaScript。为了…… 阅读更多

提交按钮会在点击时自动提交表单。使用 HTML 表单，您可以轻松地获取用户输入。`

在 HTML 中，`` 用于在 HTML 表单中创建按钮。在 `` 标签内，您可以放置文本或图像等内容。但是，使用 `` 创建的按钮并非如此。让我们来看一个 `` 和 `` 的例子：`` 标签它用于在 HTML 表单内创建按钮，在 `` 标签内，您可以放置文本或图像等内容。以下是如何向按钮添加图像的示例：示例您可以尝试运行以下代码，使用 `` 标签向按钮添加图像：        … 阅读更多

要创建多行文本输入，请使用 HTML 的 `` 标签。您可以使用 `cols` 和 `rows` 属性设置文本区域的大小。它用于表单中，允许用户输入多行文本。以下是 `<textarea>` 标签的属性：属性值说明autofocusautofocus指定在页面加载时文本区域应自动获得焦点。Colsnumber根据可见字符宽度数指定文本区域的宽度。Disableddisabled根据可见字符宽度数指定文本区域的宽度。formform_id指定一个或多个表单。maxlengthnumber指定文本区域中的最大字符数。Nametext为…… <a href="https://tutorialspoint.com/How-to-Create-a-Multi-line-Text-Input-Text-Area-In-HTML"><span class="read_more">阅读更多 <i class="fal fa-long-arrow-right"></i></span></a></p> </div> </div> </div> <div class="clear"></div> <div class="question_section"> <div class="qa_widget"> <div class="qa_post qa_list"> <h3> <a href="https://tutorialspoint.com/How-to-use-a-textarea-a-multi-line-text-input-field-in-HTML" target="_blank">如何在 HTML 中使用文本区域（多行文本输入字段）？</a> </h3> <div class="qa_category" id="tags_3310"> <a href="https://tutorialspoint.com/articles/category/HTML" target="_blank"><span>HTML</span></a><a href="https://tutorialspoint.com/articles/category/Web-Development" target="_blank"><span>网页开发</span></a><a href="https://tutorialspoint.com/articles/category/Front-End-Technology" target="_blank"><span>前端技术</span></a></div> </div> <div class="qa_answer_widget"> <a href="https://tutorialspoint.com/authors/Sai-Subramanyam" title="Sai Subramanyam"><img src="https://tutorialspoint.com/assets/profiles/13512/profile/60_68191-1512710774.jpg" alt="Sai Subramanyam"></a> <div class="qa_answer_detail"> <a href="https://tutorialspoint.com/authors/Sai-Subramanyam" title="Sai Subramanyam">Sai Subramanyam</a> </div> <div class="flex-group"> <div class="qa_answer_dtm">更新于 2020年5月14日 07:39:04</div> <p class="views-count" title="Article Views"><svg xmlns="http://www.w3.org/2000/svg" height="1em" viewBox="0 0 576 512"><path d="M117.2 136C160.3 96 217.6 64 288 64s127.7 32 170.8 72c43.1 40 71.9 88 85.2 120c-13.3 32-42.1 80-85.2 120c-43.1 40-100.4 72-170.8 72s-127.7-32-170.8-72C74.1 336 45.3 288 32 256c13.3-32 42.1-80 85.2-120zM288 32c-80.8 0-145.5 36.8-192.6 80.6C48.6 156 17.3 208 2.5 243.7c-3.3 7.9-3.3 16.7 0 24.6C17.3 304 48.6 356 95.4 399.4C142.5 443.2 207.2 480 288 480s145.5-36.8 192.6-80.6c46.8-43.5 78.1-95.4 93-131.1c3.3-7.9 3.3-16.7 0-24.6c-14.9-35.7-46.2-87.7-93-131.1C433.5 68.8 368.8 32 288 32zM192 256a96 96 0 1 1 192 0 96 96 0 1 1 -192 0zm224 0a128 128 0 1 0 -256 0 128 128 0 1 0 256 0z"></path></svg>6K+ 次浏览</p> </div> <div class="clear"></div> <p>要添加多行文本输入，请使用 HTML 的 `<textarea>` 标签。您可以使用 `cols` 和 `rows` 属性设置文本区域的大小。它用于表单中，允许用户输入多行文本。以下是 `<textarea>` 标签的属性：属性值说明autofocusautofocus指定在页面加载时文本区域应自动获得焦点。Colsnumber根据可见字符宽度数指定文本区域的宽度Disableddisabled根据可见字符宽度数指定文本区域的宽度。formform_id指定一个或多个表单。maxlengthnumber指定文本区域中的最大字符数。Nametext为…… <a href="https://tutorialspoint.com/How-to-use-a-textarea-a-multi-line-text-input-field-in-HTML"><span class="read_more">阅读更多 <i class="fal fa-long-arrow-right"></i></span></a></p> </div> </div> </div> <div class="clear"></div> <div class="question_section"> <div class="qa_widget"> <div class="qa_post qa_list"> <h3> <a href="https://tutorialspoint.com/How-to-add-video-in-HTML-page" target="_blank">如何在 HTML 页面中添加视频？</a> </h3> <div class="qa_category" id="tags_3309"> <a href="https://tutorialspoint.com/articles/category/HTML" target="_blank"><span>HTML</span></a><a href="https://tutorialspoint.com/articles/category/Web-Development" target="_blank"><span>网页开发</span></a><a href="https://tutorialspoint.com/articles/category/Front-End-Technology" target="_blank"><span>前端技术</span></a></div> </div> <div class="qa_answer_widget"> <a href="https://tutorialspoint.com/authors/Jennifer-Nicholas" title="Jennifer Nicholas"><img src="https://tutorialspoint.com/assets/profiles/13569/profile/60_88876-1512715262.jpg" alt="Jennifer Nicholas"></a> <div class="qa_answer_detail"> <a href="https://tutorialspoint.com/authors/Jennifer-Nicholas" title="Jennifer Nicholas">Jennifer Nicholas</a> </div> <div class="flex-group"> <div class="qa_answer_dtm">更新于 2020年6月16日 06:54:18</div> <p class="views-count" title="Article Views"><svg xmlns="http://www.w3.org/2000/svg" height="1em" viewBox="0 0 576 512"><path d="M117.2 136C160.3 96 217.6 64 288 64s127.7 32 170.8 72c43.1 40 71.9 88 85.2 120c-13.3 32-42.1 80-85.2 120c-43.1 40-100.4 72-170.8 72s-127.7-32-170.8-72C74.1 336 45.3 288 32 256c13.3-32 42.1-80 85.2-120zM288 32c-80.8 0-145.5 36.8-192.6 80.6C48.6 156 17.3 208 2.5 243.7c-3.3 7.9-3.3 16.7 0 24.6C17.3 304 48.6 356 95.4 399.4C142.5 443.2 207.2 480 288 480s145.5-36.8 192.6-80.6c46.8-43.5 78.1-95.4 93-131.1c3.3-7.9 3.3-16.7 0-24.6c-14.9-35.7-46.2-87.7-93-131.1C433.5 68.8 368.8 32 288 32zM192 256a96 96 0 1 1 192 0 96 96 0 1 1 -192 0zm224 0a128 128 0 1 0 -256 0 128 128 0 1 0 256 0z"></path></svg>2K+ 次浏览</p> </div> <div class="clear"></div> <p>要在 HTML 页面中添加视频，请使用 `<video>` 元素。它指定了一种在 HTML 中嵌入视频的标准方法。请记住为视频添加高度和宽度。使用 `<source>` 元素添加视频的来源，使用 `src` 属性指定视频地址，使用 `type` 属性指定视频类型。`<video>` 标签还支持以下附加属性：属性值说明height像素指定高度。srcURL指定源文件的地址。typeMIME_type指定 MIME 类型。width像素指定宽度。</p> </div> </div> </div> <div class="clear"></div> <div class="question_section"> <div class="qa_widget"> <div class="qa_post qa_list"> <h3> <a href="https://tutorialspoint.com/How-to-draw-an-SVG-file-on-an-HTML5-canvas" target="_blank">如何在 HTML5 画布上绘制 SVG 文件？</a> </h3> <div class="qa_category" id="tags_3308"> <a href="https://tutorialspoint.com/articles/category/HTML" target="_blank"><span>HTML</span></a><a href="https://tutorialspoint.com/articles/category/Web-Development" target="_blank"><span>网页开发</span></a><a href="https://tutorialspoint.com/articles/category/Front-End-Technology" target="_blank"><span>前端技术</span></a></div> </div> <div class="qa_answer_widget"> <a href="https://tutorialspoint.com/authors/Vrundesha-Joshi" title="Vrundesha Joshi"><img src="https://tutorialspoint.com/assets/profiles/13566/profile/60_88163-1512715024.jpg" alt="Vrundesha Joshi"></a> <div class="qa_answer_detail"> <a href="https://tutorialspoint.com/authors/Vrundesha-Joshi" title="Vrundesha Joshi">Vrundesha Joshi</a> </div> <div class="flex-group"> <div class="qa_answer_dtm">更新于 2021年12月16日 10:23:29</div> <p class="views-count" title="Article Views"><svg xmlns="http://www.w3.org/2000/svg" height="1em" viewBox="0 0 576 512"><path d="M117.2 136C160.3 96 217.6 64 288 64s127.7 32 170.8 72c43.1 40 71.9 88 85.2 120c-13.3 32-42.1 80-85.2 120c-43.1 40-100.4 72-170.8 72s-127.7-32-170.8-72C74.1 336 45.3 288 32 256c13.3-32 42.1-80 85.2-120zM288 32c-80.8 0-145.5 36.8-192.6 80.6C48.6 156 17.3 208 2.5 243.7c-3.3 7.9-3.3 16.7 0 24.6C17.3 304 48.6 356 95.4 399.4C142.5 443.2 207.2 480 288 480s145.5-36.8 192.6-80.6c46.8-43.5 78.1-95.4 93-131.1c3.3-7.9 3.3-16.7 0-24.6c-14.9-35.7-46.2-87.7-93-131.1C433.5 68.8 368.8 32 288 32zM192 256a96 96 0 1 1 192 0 96 96 0 1 1 -192 0zm224 0a128 128 0 1 0 -256 0 128 128 0 1 0 256 0z"></path></svg>12K+ 次浏览</p> </div> <div class="clear"></div> <p>要在画布上绘制 SVG，您需要使用 SVG 图像。首先，使用包含 HTML 的 `<img>` 元素。然后，您需要将 SVG 图像绘制到画布上。示例您可以尝试使用以下代码在 HTML 画布上绘制 SVG 文件：                    在 HTML 画布上显示 SVG 文件                                        var canvas = document.getElementById('myCanvas');                    var ctx = canvas.getContext('2d');                    var data = '' +                    … <a href="https://tutorialspoint.com/How-to-draw-an-SVG-file-on-an-HTML5-canvas"><span class="read_more">阅读更多 <i class="fal fa-long-arrow-right"></i></span></a></p> </div> </div> </div> <div class="clear"></div> <div class="job-index qa_widget" style="padding:0px 10px 0px 10px!important; margin:0px!important;"> <div class="pages"> <a href="https://tutorialspoint.com/articles/category/Web-Development/942" title="上一页">上一页<i class="fal fa-angle-left"></i></a> <a class="number" title="跳转到第1页，共1044页" href="https://tutorialspoint.com/articles/category/Web-Development/1">1</a> ... <a class="number" title="跳转到第941页，共1044页" href="https://tutorialspoint.com/articles/category/Web-Development/941">941</a> <a class="number" title="跳转到第942页，共1044页" 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