pattern matching for object properties?

[sschneider-ihre-pvs]

I was wondering if it would be feasible to use pattern matching to solve some ugly could where you sieve through object keys and check if they exist on the object to trigger side effect. For example, if you want to map some values to other values. Or need to string concat sql text if certain keys have values.

for (const key of Object.keys(input) {
  switch(key) {
    case 'a':
      target.b = input.a.b
      break;
  }
}