js实现一个简单的链式操作

如何实现一个链式操作

  function person() {}
      person.prototype = {
        setname: function(name) {
          this.name = name
          return this
        },
        setage: function(age) {
          this.age = age
          return this
        },
        getinfor: function() {
          console.log(this.age)
          console.log(this.name)
        }
      }
      var person1 = new person()
      person1
        .setname('张三')
        .setage(24)
        .getinfor()