Check the code

Question

const obj1 = { foo: 'bar', x: 42 };

const clonedObj = { ...obj1 }; // { foo: "bar", x: 42 }
for(var p in clonedObj ){
console.log(p);
console.log(clonedObj.p);
}
// output foo undefined bar undefined
// why the undefined ?

Answer 1

use
clonedObj[p]
instead of
clonedObj.p