javascript 如何在JavaScript中为构造函数的所有实例添加属性或方法？

Posted 2021-05-03

function User (name,age) {
	this.name = name,
	this.age = age
}

var user1 = new User('Pablo', 36)
var user2 = new User('Victoria', 34)

User.prototype.emailDomain = '@family.com'

var user3 = new User('Eva')