Introduction
I just saw somewhere in an FB Community group asking how they are able to share the properties from a User
interface to a PublicUser
interface.
I have answered the person who asked the question and I'd also like to share my answer in this post.
Solution
Given that you have a User
interface with the following properties that describes the model/entity.
interface User {
name: string;
email: string;
age?: number;
}
And you also want these properties in a new interface, for example for a Customer
interface we will extend the User
interface
interface Customer extends User {
phoneNumber: string;
address?: {
streetAddress: string;
} | null;
}
By doing that we will have the name
, email
, age
fields inherited into our new interface which is the Customer
interface.
So as an example I will attach a screenshot below.
To break it down for you, we created an object and gave it a type of Customer
interface, so by triggering or to peek which properties are available in Visual Studio Code (with CTRL + Space) it shows that the properties from User
interface are inherited over to the Customer
interface.
Conclusion
With that in mind instead of having to copy all properties from the User
interface and paste it into the Customer
interface, we have just inherited it into the Customer
interface from the User
interface. So we are writing lesser code.
That's all I have. Hope this was useful!
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