Problem Statement

Implement a JavaScript Proxy that automatically increments a property’s value every time it is accessed.

When a property is read, the value should increase by 1 before being returned.
This behavior should only apply to existing numeric properties on the target object.

Example

let obj = { i: 0 };

const proxy = new Proxy(obj, {
get(target, property) {
if (target[property] !== undefined) {
target[property] += 1;
return target[property];
}
},
});

console.log(proxy.i); // 1
console.log(proxy.i); // 2
console.log(proxy.i); // 3

Explanation:

  • The first access increments i from 0 → 1.
  • The second access increments i from 1 → 2.
  • The third access increments i from 2 → 3.

Constraints

  1. The Proxy should only increment existing numeric properties.
  2. Accessing a non-existent property should return undefined.
  3. The target object must reflect the updated value.

Expected Output

1
2
3