Multiply numeric property values by 2

Create a function multiplyNumeric(obj) that multiplies all numeric property values of obj by 2.

For instance:

          // before the call
let menu = {
  width: 200,
  height: 300,
  title: "My menu"
};

multiplyNumeric(menu);

// after the call
menu = {
  width: 400,
  height: 600,
  title: "My menu"
};
        

Please note that multiplyNumeric does not need to return anything. It should modify the object in-place.

P.S. Use typeof to check for a number here.

Open a sandbox with tests.

          function multiplyNumeric(obj) {
  for (let key in obj) {
    if (typeof obj[key] == 'number') {
      obj[key] *= 2;
    }
  }
}
        

Open the solution with tests in a sandbox.