激情欧美日韩一区二区|国产18在线播放|黄的日本免费大片|国产色在线 | 亚洲|青青操夜夜操

學習Professional JavaScript for Web Developers, 4th Edition

歡歡歡歡 發表于 2020-7-23 08:19

疑問匯總(也許日后能慢慢搞明白):

疑問1:位于第三章,26頁

The first concept to understand is that everything is case-sensitive; variables, function names, and operators are all case-sensitive, meaning that a variable named test is different from a variable named Test. Similarly, typeof can’t be the name of a function because it’s a keyword (described in the next section); however, typeof is a perfectly valid function name.

 

推薦的開發習慣:

1:每個語句都以分號結束。

2:if語句用花括號包住。

3:不要使用關鍵字和保留字。

 

經驗總結:

1,let在一些低版本的手機上還是不支持的。