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📜  javascript 如果未定义 - Javascript 代码示例

📅  最后修改于: 2022-03-11 15:01:14.931000             🧑  作者: Mango

代码示例6
var x; //variable to change
var y; //higher priority variable
var z = 12; //lower priority variable
x = !(y === undefined) ? y : z;
console.log(x); //12