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# 第三课

## 更多 HTML/CSS

- 超链接 <a>
- 字体 font-family
- Google Fonts

## JavaScript 语言基础

- Chrome DevTools Console
- 运算符
- 变量声明、数据类型
- 对象、函数

## 文档对象模型(DOM)

- window 对象、document 对象、全局变量
- 传统方法:`getElementById()``getElementsByTagName()``getElementsByClassName()``addEventListener()`
- 现代方法:`querySelector()``querySelectorAll()`
- jQuery:`$()`
- 事件绑定:`addEventListener()``$().on()`
- 事件冒泡机制

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