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let arr1 = [1, 2, 3, 4, 5];
let arr2 = arr1;

console.log(arr1 === arr2);

arr1 = [1, 2];

console.log(arr1 === arr2);
console.log('array1 ', arr1);
console.log('array2 ', arr2);

if array is reference type, so arr2 value should be change

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  • 2
    arr1 is being overwritten, while its referred object is still being referred by arr2. Commented Sep 26, 2022 at 19:43
  • 1
    arr2 contains a reference to "1,2,3,4,5", but never a reference to "arr1". Commented Sep 26, 2022 at 19:48
  • If you want to see how arrays are reference values, you'd need to mutate the array: arr1.length = 2. Not assign a different value to the variable. Commented Sep 26, 2022 at 19:50
  • Does that mean we are creating a copy of a reference that points to an object or array? Commented Sep 26, 2022 at 20:25

1 Answer 1

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at arr1 = [1, 2] value of the array is reassigned and hence it creates a new reference.

you can read more about it here

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