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<>《个人学习笔记一》
<>Wed标准三剑客:HTML CSS JavaScript
HTML
HTML(Hypertext Markup
Language)是超文本标记语言。它是一种标记语言,而不是编程语言。HTML是Web页面的结构。HTML使用标记来描述网页。网页的内容包括标题、副标题、段落、无序列表、定义列表、表格、单表等。
HTML文档是用来描述网页,由HTML标记和纯文本构成的文本文件。Web浏览器可以读取HTNL文档,并以网页的形式显示出它们。
CSS
CSS的作用
级联样式表(Cascading Style
Sheet,CSS),也称层叠样式表。在设计Web网页时采用CSS技术,可以有效地对页面的布局、字体、颜色、背景和其他效果实现更加精准的控制。只要对对应的代码做一些简单的修改,就可以改变同一界面的的不同部分,或者同一网站的不同页面的外观和格式。采用CSS技术是为了网页内容和表现分离的问题。
CSS语言是一种标记语言,不需要编译,属于浏览器解释型语言,可以直接由浏览器解释执行。CSS标准由W3C的CSS 工作组制定和维护。
JavaScript
JavaScript是一种基于对象和事件驱动并具有相对安全性的客户端脚本语言。同时也是一种广泛用于客户端Web开发的脚本语言,常用来给HTML网页添加动态的功能。
JavaScript的出现使得网页和用户之间实现了一种实时性的、动态的、交互性的关系。
摘自清华大学出版社《Web前端开发技术》(第三版)