Is this a variable stored as memory replication in javascript?

Question

I read that the variable is stored as a memory reference in js.

So, for a var a = 5cell with a value is 5assigned a.

I tried running this on node.js:

var a = 5;
var b = {
  val: a
};
a = 6;

I expect that to b.valbe 6, but to be 5,

If I run:

var a = 5;
var b = {
  val: a
};
var c = {
  value: b
}
b.val = 6;

What c.value.valis 6.

If all objects are memory, why is there a difference in output?

Answer 1

javascript, object variable, memory reference . . primitive values . , variable.

,

var x = { a: 10 };
var y = x;
x = 5;

, , ( ) , y 5. . y , {a:10}. x , . y , x.

Answer 2

, js.

, - .

, var a = 5 5 .

, 5 a ".

, b.val 6, 5

? … val: a … " a val. , , 5.

JavaScripts - , ( , ), ( "" ). - - , .