JavaScript 内部函数需要签名

Question

我不确定这是什么意思 ERROR'Function statements require a function name.'？目标是添加一个给出名称的函数。如果我在不编辑最后四行代码的情况下让它工作，我使用了一个内部函数来尝试完成这个作为最有效的解决方案。function ChangePerson(name){   changeName:  function(){    if(this.name != name) {      this.name = name;      return name;   }};var newPerson = new ChangePerson("John");assert(newPerson.name == "John", "The name has been set on initialization" );ninja.changeName("Bob");assert( newPerson.name == "Bob", "The name was successfully changed." );更新此外，之前的尝试是function ChangePerson(name){   return changeName(){    if(this.name != name) {     this.name = name;     }}};这也不会 changeName();。

Answer 1

你正在寻找

function Person(name) {

  this.name = name;

  this.changeName = function(newName) {

    this.name = newName;

  };

}

var ninja = new Person("John");

ninja.changeName("Bob");

或者

function makePerson(name) {

  return {

    name,                  // name: name,

    changeName(newName) {  // changeName: function(newName) {

      this.name = newName;

    },

  };

}

var ninja = makePerson("John");

ninja.changeName("Bob");