const Person = {
name: '张三',
age: 25,
[Symbol.for('height')]: '175cm',
[Symbol.for('attrs')]: '法外狂徒'
}
let names = Object.keys(Person)
let allnames = Reflect.ownKeys(Person)
let names2 = Object.getOwnPropertySymbols(Person)
console.log(names, allnames, names2)