在使用“this”关键字的方法中，如何从其他属性访问对象属性？

Question

 const america = { name: 'United State of America', yearFounded: 1776, details: { symbol: 'eagle', currency: 'USD', printDetails: function() { console.log(`The ${this.name} was founded in ${this.yearFounded} and its currency is ${this.currency}, with an ${this.symbol} symbol`); } } } america.details.printDetails();

Answer 1

The name and the founding year are not part of the object on which you are calling the method, but some other object. You can access it by explicitly referring to america.… , there is no way to access it through the this keyword . The this value in your method call refers to the details object only.

Alternatively, move the printDetails method to the outer object (so that you can call america.printDetails() instead of america.details.print() ), and use this.name and this.details.currency respectively. Or just flatten the entire structure into a single object.