I searched through the interface folder in the component.ts file but couldn't locate my typescript property

My coding dilemma goes something like this:-

Within the interface folder, I have created a book.ts file with properties. However, my book.component.ts is not recognizing the book.ts property. It seems to work fine when I import the interface (book.ts) directly into the book.component.ts file, but I prefer to keep the interface outside of the component file. How can I access this interface from my component file?

Below is a snippet of my code:-

app/interfaces/book.ts

interface Book
{
    id: number;
    title: string;
    description: string;
    author: string;
    rate?: number;
    dateStart?: Date;
    dateRead? : Date;
}

app/component/books.component.ts

import { Component, OnInit } from '@angular/core';



@Component({
  selector: 'app-books',
  templateUrl: './books.component.html',
  styleUrls: ['./books.component.css']
})


export class BooksComponent implements OnInit {

  
  
  public books: Book[];

  constructor() { }

  ngOnInit(): void {
  }

}

Upon running the application, I encountered the following error:-

https://i.sstatic.net/RLlZe.png

Folder Structure:-

https://i.sstatic.net/ROREI.png

Can anyone provide assistance in resolving this issue?

UPDATE

import { Component, OnInit } from '@angular/core';
import { Book } from '../interfaces/book'

@Component({
  selector: 'app-books',
  templateUrl: './books.component.html',
  styleUrls: ['./books.component.css']
})


export class BooksComponent implements OnInit {

  
  
  public books: Book[];

  constructor() { }

  ngOnInit(): void {
  }

}


export  interface Book
{
    id: number;
    title: string;
    description: string;
    author: string;
    rate?: number;
    dateStart?: Date;
    dateRead? : Date;
}

New Error:-

https://i.sstatic.net/CNg9R.png

Answer №1

The component file is missing the import statement for Book.

To fix this, make sure to include export in the book.ts file:

export interface Book {
  // ...
}

After adding the export, import Book in the component file like this:

import { Book } from '../../interfaces/book'
// other imports and code 

Answer №2

  1. Move the book.ts file into the interface folder. Add the prefix "export" before the interface definition for book. The syntax should look like this:

    export interface Book {}
    
  2. Next, import the interface in the component.ts file. The syntax for this should be:

    import { Book } from './interfaces';
    

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