1、? ...運算符? （淺拷貝）
let obj = {a:1,b:2};
let obj2 = {...obj};
obj.a=3
obj //{a: 3, b: 2}
obj2 //{a: 1, b: 2}
a = {a:[{b:1}]};b = a ;
b.a[0].b = 2; //b = {a:[{b:2}]}
a // a = {a:[{b:2}]}
2、?JSON.parse(JSON.stringify(參數))? （深拷貝）
轉載于:https://www.cnblogs.com/cuikaitong/p/10100862.html
