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ID：56468378
大小：1.02 MB
页数：32页
时间：2020-06-19
《CSS样式快速入门培训资料.ppt》由会员上传分享，免费在线阅读，更多相关内容在应用文档-天天文库。
1、HTML+CSS基础知识分享基本介绍1Html是什么？HTML是用来描述网页的一种语言。HTML标签HTML标签是由尖括号包围的关键词，比如HTML标签通常是成对出现的，比如和标签对中的第一个标签是开始标签，第二个标签是结束标签开始和结束标签也被称为开放标签和闭合标签一段最基础的HTML
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2、>与之间的文本是可见的页面内容
与
文字段落把一个行级元素拆分，给与块级结构。无序列表图片表格内联框架CSS是什么？能做什么？控制网页中元素的颜色、大小、位置、风格及效果。颜色：背景色、边线色、文字色…大小：文字大小、各种容器大小…图片：控制切片（元素），使其与效果图一致。风格：为元素设置诸如</p><p>3、阴影、模糊和透明等效果。位置：可调整各个元素间的间距与位置。效果：基础交互动态，也可与脚本语言组合，产生各种高级动态效果。CSS添加方式1添加CSS方式CSS样式有3种添加方法1.外部样式表–最佳方式，便于查找与修改。2.内部样式表–可针对当前独立页面使用。3.内联样式–后期的小修补。外部样式表<html><head><linktype="text/css"rel="stylesheet"href="basic.css"></head><body>…</body></html>内部样式表<html><head><sty</p><p>4、letype="text/css">body{background-color:#ff8008;}</style></head><body></body></html>内联样式<html><head></head><bodystyle=“background-color:green”;></body></html>层叠次序当同一个HTML元素被不止一个样式定义时引用次序如下1.外部样式表2.内部样式表（位于<head>标签内部）3.内联样式（在HTML元素内部，最高优先权）选择器介绍2选择器种类1类别选择器2标签选择器</p><p>5、3ID选择器4后代选择器5子选择器6伪类选择器7通用选择器8群组选择器9相邻同胞选择器10属性选择器标签选择器一个完整的HTML页面是有很多不同的标签组成，如<div><p><h1>…标签选择器不加任何前缀例如：p{color:#FF0000;}h1{line-height:45px;}标签选择器<html><head><styletype="text/css">p{color:yellow;}</style></head><body><h1>标题</h1><p>为人民服务</p></body></html>类别选择器</p><p>6、类选择器根据类名来选择，前面以”.”来标志。例如：.demoDiv{color:#FF0000;}.wangxiangyi{height:45px;width:230px;}类别选择器<html><head><styletype="text/css">.important{color:yellow;}</style></head><body><h1class=“important”>好好学习</h1><pclass=“important”>天天向上</p><p>学习雷锋好榜样</p></body></html>ID选择</p><p>7、器根据元素ID来选择元素，具有唯一性。前面以”#”号来标志。例如：#demoDiv{color:#FF0000;}#wangxiangyi{height:45px;width:230px;}ID选择器<html><head><styletype="text/css">#important{color:yellow;}</style></head><body><h1id=“important”>好好学习</h1><pid=“important”>天天向上</p><p>学习雷锋好榜样</p></body></html>伪类</p><p>8、选择器用于文档以外的其他条件来应用元素的样式常用于按键、链接等Link表示链接在没有被点击时的样式。Visited表示链接已经被访问时的样式。Hover表示当鼠标悬停在链接上面时的样式。Active表示鼠标点住时一刹那样式。伪类选择器<html><head><styletype="text/css">a{margin:0200px</p> 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