Where are array we create stored?

for example we made array
arr=[1,2,2,45,7]

Array.prototype.joinOriginal = Array.prototype.join

Array.prototype.join = function () {
console.log(‘join called on’, this)
return this.joinOriginal(…arguments)
}

now we did
arr.join(’,’)
output
join called on {the array arr}
prototype array ka

toh I’m asking does arr and Array.prototypes are on the same level

where are array stored that we make

9717712056 if you didn’t understand what im asking just give me a call