问为什么在控制台记录一个函数时返回"function“而不是”function“？

EN

      function Person(first, last, age, gender) {
        this.enroll = function abc() {
            console.log("hello world")
        }
        // property and method definitions
        this.name = {
          first: first,
          last: last,
        };
        this.age = age;
        this.gender = gender;
        //...see link in summary above for full definition
      }

      let person1 = new Person('Bob', 'Smith', 32, 'male', ['music', 'skiing']);

      console.log(person1);

ƒ abc()
    arguments: null
    caller: null
    length: 0
    name: "abc"
    prototype: {constructor: ƒ}
    [[FunctionLocation]]: oop2.html:12
    [[Prototype]]: ƒ ()
    [[Scopes]]: Scopes[2]