class Person {
constructor(name) {
this.name = name
}
}
const member = new Person("John")
console.log(typeof member)
"class"
"function"
"object"
"string"
类是构造函数的语法糖,如果用构造函数的方式来重写Person
类则将是:
function Person() {
this.name = name
}
通过new
来调用构造函数,将会生成构造函数Person
的实例,对实例执行typeof
关键字将返回"object"
,上述情况打印出"object"
。