🔣comma (,)

punctuator `,`

JS ⟩ grammar ⟩ token ⟩ punctuator ⟩ comma (,)

🔴 主題

• comma operator (,) - a, b

• array literal - [1, 2, 3].

• object literal - {x: 1, y: 2}.

• trailing comma - [1, 2, 3,], {x: 1, y: 2,}.

• variable declaration - let a = 1, b = 2;