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()