2025年web前端开发知识点总结

HTML 知识总结常用标签文本类span行级元素，多个同行div块级元素，独占一行p块级元素，前后保留一行h标题标签， h1~h6 表 6 个等级，加粗，前后保留一行图片标签imgwidth ：设置宽度height ：设置高度alt ：图片加载失败显示的文本水平线hrcolor ：颜色size ：高度（粗细）width ：宽度（长度）超链接aherf ：超链接转到的地址target_self: 默认值，在当前页面打开_blank: 在新窗口打开带标题的框fieldsetlegend设置标题列表标签无序列表uldisc ：实心圆square ：小方块circle ：空心圆有序列表ol表格标签 tr表示行th表示标题单元格，居中、加粗td表示一个单元格caption表示标题，定义在第一行，居中rowspan设置单元格占的行数colspan设置单元格占的列数表单项 action表单提交地址methodget ：显示提交参数，将参数用 ? 和 & 拼接到 url 上带到服务器端post ：隐式提交参数下拉菜单 optgroup 表示分组 , 分组不能选 , 只能选分组中的 optionselected 默认选中multiple 设置下拉菜单为多选模式文本域 rows: 显示文本的行数 ( 高度 )cols: 显示文本的列数 ( 宽度 )input文本框 type=“text”name ：参数名size ：显示字符长度（控制文本框长度）maxlength ：最大可输入字符数placeholder ：提示内容disabled ：不会被提交到服务器readonly ：只读（会被提交到服务器）value ：默认值input密码框 type=“password”单选按钮 type=“radio”checked ：默认选中复选框 type=“checkbox”文件选择框 type=“file”按钮按钮 type=“button”提交 type=“submit”重置 type=“reset”框架集 <frameset>frame ：表示框架noresize ：不能改变框架大小scolling ：是否显示滚动条（ yes 、 no 、 auto ）rows设置框架集在纵向上的拆分策略cols设置框架集在横向上的拆分策略border框架边框的宽度borderColor框架边框颜色frameBorder 设置框架是否有边框 (yes|no)框架集中的超链接打开方式 target_blank: 新窗口中打开_self: 在当前窗口打开_parent: 父窗口中打开_top 在最顶层窗口中打开frameName ：在对应 name 框架打开其他标签ifame在页面中嵌入框架dl 、 dt 、 dd<dl><dt> 数码 </dt> <!-- dt 不会缩进 --><dd> 手机 </dd> <!-- dd 会缩进 --></dl>marquee ：滚动标签img usemap<img src="usemap_img.jpg" u...</div></div><div class="pre-detail-bottom"><a class="pre-detail-more" href="javascript:;" kes-height="0">查看更多 <i class="icon-lower"></i></a></div></div></div><div class="noticeidtxt"><p>1、当您付费下载文档后，您只拥有了使用权限，并不意味着购买了版权，文档只能用于自身使用，不得用于其他商业用途（如 [转卖]进行直接盈利或[编辑后售卖]进行间接盈利）。<br>2、本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。<br>3、如文档内容存在违规，或者侵犯商业秘密、侵犯著作权等，请点击“违规举报”。</p></div><div class="noticeidtxt"><p>碎片内容</p></div></div><div class="view-hd"><div class="container"><div class="view-hd-bd"><div class="format"><i class="file-icon icon-word"></i></div><h2>2025年web前端开发知识点总结</h2><ul class="operate"><li><a class=" view-down-btn" 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