类

class Person {
  name: string
  constructor(name: string) {
    this.name = name
  }
  sayHi() {
    return `Hi, my name is ${this.name}`
  }
}
 
var Jothy = new Person('Jothy')
console.log(Jothy.sayHi())

'use strict'
var Person = /** @class */ (function() {
  function Person(name) {
    this.name = name
  }
  Person.prototype.sayHi = function() {
    return 'Hi, my name is ' + this.name
  }
  return Person
})()
var Jothy = new Person('Jothy')
console.log(Jothy.sayHi())