在 JavaScript 中将项目添加到对象数组中

Question

Here's the code:

const cart = {
  contents: [],
  addItem(item) {
  }
};
cart.addItem("laptop");
console.log("The cart contains:", cart.contents);

I want to obviously add the item "laptop" into the property "contents" of the object "cart" and for the console.log to display that information. I think all I need is for the "addItem(item)" method to know WHERE ("contents: [],") exactly to add these items bc right now it seems like it points to nothing? Any help would be awesome. Thanks.

Answer 1

In your addItem method, do this:

 addItem(item) {
    this.contents.push(item)
 }

This accesses the object's contents via this , and adds the item to the array.