why JavaScript array is working differently? [duplicate]

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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