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assignment to destructured object property from function parameter list doesn't mutate object

is this expected?

const testObj = {
  a: 'hi',
  b: 'there'
}


function destructured_test({a, b}) {
    a = 'bye';
}

console.log(testObj);
destructured_test(testObj);
console.log(testObj);

function test(t) {
    t.a = 'bye';
}

console.log(testObj);
test(testObj);
console.log(testObj);

only the function 'test' mutates testObj 'destructured_test' seems to be copying the properties over instead of preserving the reference

about 4 years ago · Juan Pablo Isaza
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