🔣parentheses ()

JS ⟩ grammar ⟩ token ⟩ punctuator ⟩ parentheses ()

🔴 主題

• invocation expression：f()： f(args)

• optional invocation ?.()：?.()

• for loops： for(;;), for(in), for(of)

• switch - switch(<expr>){...}.

• try-catch-finally - try {...} catch(err) {...}.

⭐️ 重點

👉 table of operators

nullish coalescing (??)

• precedence of ?? relative to ||, && not defined.

• explicitly use parentheses if ?? is mixed with ||, &&.

exponentiation (**)

• precedence of ** relative to - (unary negation) not defined.

• explicitly use parentheses when mixing - with **.