如何获取对象名称的字符串？

Question

我有一些对象：

var book = {}
book.title = "Big bad book"
book.size = {}
book.size.width = "1 meter"
book.size.height = "2 meter"

我想得到这样的东西

nameof(book) // book
nameof(book.size) // book.size

或者

book.objectName // book
book.size.objectName // book.size

我该怎么做？

Answer 1

使用构造函数创建对象时，可以检索对象的名称：

function Book(){
  this.title = "Big bad book"
  this.size = {}
  this.size.width = "1 meter"
  this.size.height = "2 meter"
}

var book = new Book();
console.log(book.constructor.name);