Why [] == [] is false in JavaScript?

Question

I am working on a part of the code where I have an array which looks like [[data]]. The data is rendered on the server side through the Django temp

Answer 1

Because Arrays are reference type, meaning, if for example you make an array

let a = [1,2,3,4,5];

let b = a;

the b is actually just a reference of array a, so if you compare them

a===b is true,

because they are basically link together.. So if you change something to array b it will also going to be change to array a,

b[0] = "test";

array a now is ["test",2,3,4,5];

But if you do this this

let a = [1,2,3,4,5];

let b = a.slice(0);

and then compare them

a===b is false

because now they are both different Arrays, meaning if you change the Array b, it will not affect the Array a

b[0] ="hello";

Array a is still [1,2,3,4,5]

while array b is now ["hello",2,3,4,5]

that is also what happen when you compare the []===[] is false

Because basically what you are asking to JavaScript is if they are the same Array which is not