isbn-fetch

A small package that fetches book information given an ISBN number.

Usage

import IsbnFetch from 'isbn-fetch';

// Fetch a book with the best possible information
// Note: this method does not throw an error even if all providers fail
const book = await IsbnFetch.combined('978-3-453-31716-1');

// Fetch a book from Google Books
try {
    const book = await IsbnFetch.googlebooks('978-3-453-31716-1');
} catch (e) {
    console.error(e);
}

Providers

| function name | description | | --- | --- | | googlebooks | Fetches book information from the Google Books API. | | openlibrary | Fetches book information from the Open Library API. | | combined | Fetches book information from all other providers. Tries to return the most complete information. |

All providers are exported as functions from the default export object.
For more infomation about a specific method see the documentation in the type definition files.

Types

A Book object is defined as follows:

type Book = {
    isbn10?: string;
    isbn13?: string;
    title?: string;
    authors?: string[];
    publishedDate?: string;
    genres?: string[];
    language?: string;
    pageCount?: number;
    thumbnail?: string;
    thumbnailSmall?: string;
    description?: string;
    publishers?: string[];
};

All provider functions have the following signature:

async function provider(isbn: string, fetchOptions?: FetchOptions): Promise<Book>;

Fetch options are a stripped down version of the RequestInit interface:

type FetchOptions = Omit<RequestInit, "body" | "method" | "keepalive">;

For more information see the documentation in the type definition files.

Installation

npm i isbn-fetch --save

combinedResults

You can use the combinedResults function to merge the results of only selected providers:

import IsbnFetch from 'isbn-fetch';

const book = IsbnFetch.combinedResults({
    googlebooks: /* fetched Book or undefined */,
    openlibrary: /* fetched Book or undefined */
});

This is not a simple function over an array of books because it knows which provider has the best chance of providing the best information for each field.