Javascript 原始类型（字符串、数字……）不可变而引用类型（对象、数组）可变的原因是什么

Question

I wonder if the reason is that Primitive types are stored in STACK memory, which it's a limited size memory, in the opposite HEAP memory is used for dynamic variables.

I want to know the reason why primitive variables cannot be changed... (security, perform, memory)...

Thank you all

Answer 1

Trying to understand what you mean.

 var a = ''; console.log(typeof a); // string a = 5; console.log(typeof a); // number