if condition ! falsy value


Posted by mijouhsieh on 2023-03-27

// 錯誤寫法
if(!movies || !(movies.length === 0 )) { return }

正確寫法
if(!movies || !movies.length) return

movies.length若為0 就是 false
!false 就是 true
所以不用寫(movies.length === 0)

return 在同一行,不用寫{}


#|| #OR operator #! #debug







Related Posts

CSS

CSS

CSS 語法架構 (Cascading Style Sheets)

CSS 語法架構 (Cascading Style Sheets)

Git error -> fatal: the remote end hung up unexpectedly

Git error -> fatal: the remote end hung up unexpectedly


Comments