JS向对象添加属性

• 有条件地向对象添加属性

const condition = true;
const person = {
  id: 1,
  name: 'Zeo',
  ...(condition && { age: 3 }),
};

• 检查属性是否存在对象中

const person = { name: 'Zeo', salary: 100000 };
console.log('salary' in person); // true
console.log('age' in person); // false

• 对象中的动态属性名称

const dynamic = 'flavour';
var item = {
  name: 'Zeo',
  [dynamic]: 'book'
}
console.log(item); // { name: 'Zeo', flavour: 'book' }

• 使用动态键进行对象解构

const person = { id: 1, name: 'Zeo' };
const { name: personName } = person;
console.log(personName); // 'Zeo'