Angular IndexedDB - A JavaScript Library for Working with IndexedDB

Introduction

Angular IndexedDB is a JavaScript library that provides an Angular wrapper for working with IndexedDB, a web browser database API for storing and retrieving structured data. IndexedDB allows developers to build offline-first applications that can store large amounts of data locally without requiring an internet connection.

This library simplifies the usage of IndexedDB within an Angular application by providing a set of Angular-specific services and directives. It abstracts away the complexity of working directly with the raw IndexedDB API and provides a more intuitive and Angular-friendly interface.

Features

• Easy Setup: Angular IndexedDB can be easily installed via npm and integrated into an existing Angular project.
• Angular Integration: The library provides Angular services and directives that can be easily injected into components.
• CRUD Operations: Angular IndexedDB supports all basic CRUD (Create, Read, Update, Delete) operations for working with IndexedDB.
• Querying: It provides a query interface to fetch data based on specific criteria.
• Transactions: The library supports transactions, allowing for atomicity and data consistency during complex operations.
• Error Handling: It provides error handling mechanisms, ensuring smooth error recovery and preventing application crashes.
• Versioning: Angular IndexedDB offers versioning capabilities, allowing developers to manage different versions of their IndexedDB database schema.

Code Example

Here is an example of how to use Angular IndexedDB to perform basic CRUD operations:

import { Component } from '@angular/core';
import { IndexedDBService } from 'angular-indexeddb';

@Component({
  selector: 'app-root',
  template: `
    <div>
      <button (click)="addItem()">Add Item</button>
      <button (click)="getItems()">Get Items</button>
    </div>
  `,
})
export class AppComponent {
  constructor(private indexedDBService: IndexedDBService) {}

  addItem() {
    const item = { id: 1, name: 'Example Item' };
    this.indexedDBService.add('items', item)
      .subscribe(() => console.log('Item added successfully.'));
  }

  getItems() {
    this.indexedDBService.getAll('items')
      .subscribe(items => console.log(items));
  }
}

In the above code, the IndexedDBService is injected and used to add an item to the "items" store and retrieve all items from it.

Conclusion

Angular IndexedDB is a powerful library that simplifies working with IndexedDB in Angular applications. It provides a convenient Angular wrapper around the raw IndexedDB API, making it easier to perform database operations. With its support for CRUD operations, querying, transactions, error handling, and versioning, Angular IndexedDB is an invaluable tool for building offline-first web applications.

For more information on how to use Angular IndexedDB, please refer to the official documentation.