➕nullish coalescing (??)

🚧 under construction

JS ⟩ statement ⟩ expression ⟩ operator ⟩ logical ⟩ nullish coalescing operator (??)

(⭐️ ES2020)

expr ?? default    // nullish coalescing

👉 table of operators

⭐️ 重點

?? operator

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

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

👉 table of operators

👥 相關

💈範例

📗 參考

📘 手冊

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