JS deep and shallow copy

Shallow copy : If you want to copy the basic data type , Then shallow copy can be implemented . If it is data of reference type , A shallow copy simply implements a reference to a memory address , Modify the original data , Will affect the copied data .

Deep copy : Realize the copy of data and memory address , It is equivalent to reopening the space to store data and memory addresses .

How to realize deep copy :1. Passing objects through json.stringfy Convert to string , Assign to new variable , Then pass the new variable through json.parse Turn to object ;

2. Recursive implementation