仅返回值 if.includes() 使用.find() 找到一些东西

Question

I have this function set up, consuming a Google Maps API response:

 zipCode: addressObject.address_components.find((component) =>
          component.types.includes("postal_code")
        ).long_name,

However, the postal_code is not in the types , so how do I only retrieve the long_name when the types array includes postal_code ?

Answer 1

Use the optional chaining ( ?. ) operator to get undefined when no item is found:

zipCode: addressObject.address_components.find((component) =>
  component.types.includes("postal_code")
)?.long_name,