lazy.js

console.group('Lazy Setter with Nullish Coalescing Operator');

const nameThisCatPlease = new Cat('Pepo');
console.assert(nameThisCatPlease.name === 'Pepo');

nameThisCatPlease.name ?? ( nameThisCatPlease.name = 'Cleo')
console.assert(nameThisCatPlease.name === 'Pepo');

nameThisCatPlease.name = undefined;

nameThisCatPlease.name ?? ( nameThisCatPlease.name = 'Cleo')
console.assert(nameThisCatPlease.name === 'Cleo');

console.groupEnd();

/*
Console:

Lazy Setter with Nullish Coalescing Operator
  get called Pepo
  get called Pepo
  get called Pepo
  set called undefined
  get called undefined
  set called Cleo
  get called Cleo
*/