📜  无效合并 js - Javascript 代码示例

📅  最后修改于: 2022-03-11 15:02:06.946000             🧑  作者: Mango

代码示例1
The nullish coalescing operator ( ?? ) is a logical operator that returns its right-hand side operand when its left-hand side operand is null or undefined , and otherwise returns its left-hand side operand