为什么js中变量不能这么定义？

Question

var person2 = {
    name: 'Christina',
    sayHi: sayHi(){
  console.log(this.name);
}
}

老报错，不知道为什么？

Answer 1

正确写法：

var person2 = {
    name: 'Christina',
    sayHi: function(){
      console.log(this.name);
    }
}

别问为什么，这个是规范哦

Answer 2

sayHi: functuon sayHi(){....}

Answer 3

var person2 = {
    name: 'Christina',
    sayHi(){
      console.log(this.name);
    }
}