This example uses array destructuring. Object.entries()
returns an array.
const usersObject = {
'John': 'Doe',
'Oliver': 'Jones',
'Alex': 'Lones',
}
const foundUser = Object.entries(usersObject)
.find(([key, value]) => key === 'Oliver' && value === 'Jones');
console.log(foundUser); // [ 'Oliver', 'Jones' ]