Page 7 - 你不知道的JavaScript（上卷）

目录

前言 ...................................................................................................................................................... VIII

第一部分 作用域和闭包

序 ............................................................................................................................................................... 2

第 1 章 作用域是什么 ...................................................................................................................... 4
1.1 编译原理 ..................................................................................................................................... 4
1.2 理解作用域 ................................................................................................................................. 6
1.2.1 演员表 ............................................................................................................................ 6
1.2.2 对话 ................................................................................................................................ 6
1.2.3 编译器有话说 ................................................................................................................ 7
1.2.4 引擎和作用域的对话 .................................................................................................... 9
1.2.5 小测验 .......................................................................................................................... 10
1.3 作用域嵌套 ............................................................................................................................... 10
1.4 异常 ........................................................................................................................................... 12
1.5 小结 ........................................................................................................................................... 12

第 2 章 词法作用域 ......................................................................................................................... 14
2.1 词法阶段 ................................................................................................................................... 14
2.2 欺骗词法 ................................................................................................................................... 17
2.2.1 eval ............................................................................................................................... 17
2.2.2 with ............................................................................................................................... 18
2.2.3 性能 .............................................................................................................................. 20
2.3 小结 ........................................................................................................................................... 21

IV