How to use IndexedDB in Angular?
Easiest way to use IndexedDB. A lightweight, minimalistic wrapper that provides a straightforward API for developers using IndexedDB shared below a link
https://dexie.org
use ngx-indexed-db npm library:
npm install ngx-indexed-db
Import the NgxIndexedDBModule and initiate it:
import { NgxIndexedDBModule } from 'ngx-indexed-db';
const dbConfig: DBConfig = {
name: 'MyDb',
version: 1,
objectStoresMeta: [{
store: 'people',
storeConfig: { keyPath: 'id', autoIncrement: true },
storeSchema: [
{ name: 'name', keypath: 'name', options: { unique: false } },
{ name: 'email', keypath: 'email', options: { unique: false } }
]
}]
};
@NgModule({
...
imports: [
...
NgxIndexedDBModule.forRoot(dbConfig)
],
...
})
Migrations:
import { NgxIndexedDBModule, DBConfig } from 'ngx-indexed-db';
// Ahead of time compiles requires an exported function for factories
export function migrationFactory() {
// The animal table was added with version 2 but none of the existing tables or data needed
// to be modified so a migrator for that version is not included.
return {
1: (db, transaction) => {
const store = transaction.objectStore('people');
store.createIndex('country', 'country', { unique: false });
},
3: (db, transaction) => {
const store = transaction.objectStore('people');
store.createIndex('age', 'age', { unique: false });
}
};
}
const dbConfig: DBConfig = {
name: 'MyDb',
version: 3,
objectStoresMeta: [{
store: 'people',
storeConfig: { keyPath: 'id', autoIncrement: true },
storeSchema: [
{ name: 'name', keypath: 'name', options: { unique: false } },
{ name: 'email', keypath: 'email', options: { unique: false } }
]
}, {
// animals added in version 2
store: 'animals',
storeConfig: { keyPath: 'id', autoIncrement: true },
storeSchema: [
{ name: 'name', keypath: 'name', options: { unique: true } },
]
}],
// provide the migration factory to the DBConfig
migrationFactory
};
@NgModule({
...
imports: [
...
NgxIndexedDBModule.forRoot(dbConfig)
],
...
})
NgxIndexedDB service First, import the service:
import { NgxIndexedDBService } from 'ngx-indexed-db';
...
export class AppComponent {
constructor(private dbService: NgxIndexedDBService){
}
}
I use Dexie as it's a more mature and lightweight library and with all features. Compatible with VueJs, React, Angular and Vanilla JS
Alternative ngx-indexed-db