get 惰性求值

[981377660LMT]

const person = {
    firstName: 'George',
    lastName: 'Costanza',
    fullName: `${person.firstName} ${person.lastName}`
};
错误 TS2448：在声明之前使用块范围变量“person”。

const person = {
    firstName: 'George',
    lastName: 'Costanza',
    get fullName() { return `${person.firstName} ${person.lastName}`; }
};

console.log(JSON.stringify(person));