學習Professional JavaScript for Web Developers, 4th Edition
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。