What is the best way to include a new property to an existing interface and then export the updated interface in Typescript?

Can you provide guidance on creating a new interface - UIInterface that combines SummaryInterface with additional properties?

For example:

import { SummaryInterface } from 'x-api'; // summaryInterface includes 20+ predefined properties generated automatically

Here is my approach:

export interface UIInterface {
    SummaryInterface &
     { displayStatus: string;
       flag: boolean }; 
}

Answer №1

If we were to expand upon the existing interface in this manner:

export interface UserInterface extends SummaryInterface {
  displayMode: string;
  isActive: boolean;
}

Answer №2

If you want to merge properties from a parent class and a child interface, you can use the following code:

Extending Parent Class Properties

This code snippet demonstrates inheriting both parent class and child interface properties.

export interface UIInterface extends SummaryInterface {
  displayStatus: string;
  flag: boolean;
}

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