IndexedDB Stream

Use node.js streams to read from / write to an IndexedDB.

How to use

First install with npm or yarn:

npm install --save indexed-db-stream
yarn install --save indexed-db-stream

Use this library in your JavaScript or TypeScript project:

JavaScript

const indexedDbStream = require('indexed-db-stream');
 
// Keep in mind that you have to create your database first on the "onupgradeneeded" event!
const writer = new indexedDbStream.IndexedDbWriteStream({
    databaseName: 'myDatabase',
    databaseVersion: 1, // optional
    objectStoreName: 'myStore'
});
 
writer.write({text: 'first chunk'});
writer.write({text: 'second chunk'});
// ...
writer.end();
 
// -- same for the reader --
 
const reader = new indexedDbStream.IndexedDbReadStream({
    databaseName: 'myDatabase',
    databaseVersion: 1, // optional
    objectStoreName: 'myStore',
    indexName: 'myIndex', // optional
    cursorDirection: 'next' // optional
});
 
reader.pipe(/* ... */);
reader.on("data", function(chunk) {
    console.log('This is from your IndexedDB:', chunk);
});
reader.on("end", function() {
    console.log('Reader finished...');
});

TypeScript

import { IndexedDbReadStream, IndexedDbWriteStream } from "indexed-db-stream"
 
// Keep in mind that you have to create your database first on the "onupgradeneeded" event!
const writer: IndexedDbWriteStream = new IndexedDbWriteStream({
    databaseName: 'myDatabase',
    databaseVersion: 1, // optional
    objectStoreName: 'myStore'
});
 
writer.write({text: 'first chunk'});
writer.write({text: 'second chunk'});
// ...
writer.end();
 
// -- same for the reader --
 
const reader: IndexedDbReadStream = new IndexedDbReadStream({
    databaseName: 'myDatabase',
    databaseVersion: 1, // optional
    objectStoreName: 'myStore',
    indexName: 'myIndex', // optional
    cursorDirection: 'next' // optional
});
 
reader.pipe(/* ... */);
reader.on("data", (chunk: any) => {
    console.log('This is from your IndexedDB:', chunk);
});
reader.on("end", () => {
    console.log('Reader finished...');
});

NPM Tasks

• npm run doc: Create an API documentation with typedoc.
• npm run browser-test: Create a test that you can run in your browser (target: browser-test/index.html).
• npm test: Run tests with karma automated in several browsers and create a coverage-report.

Contribution

Make an issue on GitHub, or even better a pull request and try to fulfill the software tests.

License

This library is under ISC License © by Arne Schubert.