在 JavaScript 中创建对象的方法

const newobject = {} // simply create a new empty objectconst newobject = {   somekey: "somevalue",   anotherkey: "anothervalue" }

// below options create and return an empty objectconst objwithnovalue = new object();const objwithundefined = new object(undefined);const objwithnull = new object(null);const newobject = {   somekey: "somevalue",   anotherkey: "anothervalue" }const sameobject = new object(someobject);sameobject['andanotherkey'] = "one another value";sameobject === newobject; // both objects are same. 

const person = {  greet: function () {    console.log(`hello ${this.name || 'guest'}`);  }}const driver = object.create(person);driver.name = 'john';driver.greet(); // hello john

function person(name, location) {  this.name = name;  this.location = location;  greet() {    console.log(`hello, i am ${this.name || 'guest'} from ${this.location || 'earth'}`);  }}const alex = new person('alex');alex.greet(); // hello, i am alex from earthconst sam = new person('sam anderson', 'switzerland');sam.greet(); // hello, i am sam anderson from switzerland

class Person {  constructor(name, location) {    this.name = name || 'Guest';    this.location = location || 'Earth';  }  greet() {    console.log(`Hello, I am ${this.name} from ${this.location}`);  }}const santa = new Person('Santa');santa.greet(); // Hello, I am Santa from Earth