npmpackage.info

Gathering detailed insights and metrics for rxdb-premium

rxdb-premium

A fast, local first, reactive Database for JavaScript Applications https://rxdb.info/

15.39.0

21,662

Apache-2.0

TypeScript

139,197 4.5

Installations

npm install rxdb-premium

Pull Requests

Open

10

Total

5,799

Closed

616

Merged

5,173

Issues

Open

5

Total

752

Closed

747

Releases

476

16.0.0-beta.4

Published on 28 Nov 2024

16.0.0-beta.3

Published on 27 Nov 2024

16.0.0-beta.2

Published on 25 Nov 2024

16.0.0-beta.1

Published on 25 Nov 2024

15.39.0

Published on 21 Nov 2024

15.38.3

Published on 18 Nov 2024

View all 476 releases

Developer

pubkey

Developer Guide

BETA

Module System

ESM

Min. Node Version

Typescript Support

No

Node Version

20.16.0

NPM Version

10.8.1 Statistics

21,662 Stars

11,914 Commits

1,068 Forks

206 Watching

242 Branches

228 Contributors

Updated on 29 Nov 2024

Languages

TypeScript (91.53%)

JavaScript (4.9%)

CSS (3.04%)

Dart (0.33%)

HTML (0.18%)

Shell (0.02%)

Total Downloads

Cumulative downloads

Total Downloads

139,197

Last day

-17.6%

490

Compared to previous day

Last week

26.6%

3,247

Compared to previous week

Last month

30.6%

11,820

Compared to previous month

Last year

176.7%

98,453

Compared to previous year

Daily Downloads

Weekly Downloads

Monthly Downloads

Yearly Downloads

Dependencies

@koa/cors array-push-at-sort-position async-test-util eth-crypto flexsearch percom web-locks web-worker

Peer Dependencies

rxdb rxjs

Versions

A fast, local-first, reactive Database for JavaScript Applications

What is RxDB?

RxDB (short for Reactive Database) is a local-first, NoSQL-database for JavaScript Applications like Websites, hybrid Apps, Electron-Apps, Progressive Web Apps, Deno and Node.js. Reactive means that you can not only query the current state, but subscribe to all state changes like the result of a query or even a single field of a document. This is great for UI-based realtime applications in a way that makes it easy to develop and also has great performance benefits but can also be used to create fast backends in Node.js.
RxDB provides an easy to implement protocol for realtime replication with your existing infrastructure or one of the plugins for HTTP, GraphQL, CouchDB, Websocket, WebRTC, Supabase, Firestore, NATS.
RxDB is based on a storage interface that enables you to swap out the underlying storage engine. This increases code reuse because you can use the same database code for different JavaScript environments by just switching out the storage settings.

Use the quickstart, read the documentation or explore the example projects.

Multiplayer realtime applications

Replicate with your existing infrastructure

RxDB provides an easy to implement, battle-tested replication protocol for realtime sync with your existing infrastructure.
There are also plugins to easily replicate with GraphQL, CouchDB, Websocket, WebRTC,Supabase, Firestore or NATS.

Flexible storage layer

RxDB is based on a storage interface that enables you to swap out the underlying storage engine. This increases code reuse because the same database code can be used in different JavaScript environments by just switching out the storage settings.

You can use RxDB on top of IndexedDB, OPFS, LokiJS, Dexie.js, in-memory, SQLite, in a WebWorker thread and even on top of FoundationDB and DenoKV.

No matter what kind of runtime you have, as long as it runs JavaScript, it can run RxDB:

Browsers Node.js React Native Capacitor NativeScript Flutter or as an Electron Database

Quick start

Install

1npm install rxdb rxjs --save

Store data

1import { 
2  createRxDatabase
3} from 'rxdb/plugins/core';
4
5/**
6 * For browsers, we use the dexie.js based storage
7 * which stores data in IndexedDB in the browser.
8 * In other JavaScript runtimes, we can use different storages:
9 * @link https://rxdb.info/rx-storage.html
10 */
11import { getRxStorageDexie } from 'rxdb/plugins/storage-dexie';
12
13// create a database
14const db = await createRxDatabase({
15    name: 'heroesdb', // the name of the database
16    storage: getRxStorageDexie()
17});
18
19// add collections
20await db.addCollections({
21  heroes: {
22    schema: mySchema
23  }
24});
25
26// insert a document
27await db.heroes.insert({
28  name: 'Bob',
29  healthpoints: 100
30});

Query data once

1const aliveHeroes = await db.heroes.find({
2  selector: {
3    healthpoints: {
4      $gt: 0
5    }
6  }
7}).exec(); // the exec() returns the result once

Observe a Query

1await db.heroes.find({
2  selector: {
3    healthpoints: {
4      $gt: 0
5    }
6  }
7})
8.$ // the $ returns an observable that emits each time the result set of the query changes
9.subscribe(aliveHeroes => console.dir(aliveHeroes));

Continue with the quickstart here.

More Features (click to toggle)

Subscribe to events, query results, documents and event single fields of a document

RxDB implements rxjs to make your data reactive. This makes it easy to always show the real-time database-state in the dom without manually re-submitting your queries. You can also add custom reactiveness libraries like signals or other state management.

1db.heroes
2  .find()
3  .sort('name')
4  .$ // <- returns observable of query
5  .subscribe( docs => {
6    myDomElement.innerHTML = docs
7      .map(doc => '<li>' + doc.name + '</li>')
8      .join();
9  });

MultiWindow/Tab

RxDB supports multi tab/window usage out of the box. When data is changed at one browser tab/window or Node.js process, the change will automatically be broadcasted to all other tabs so that they can update the UI properly.

EventReduce

One big benefit of having a realtime database is that big performance optimizations can be done when the database knows a query is observed and the updated results are needed continuously. RxDB internally uses the Event-Reduce algorithm. This makes sure that when you update/insert/remove documents, the query does not have to re-run over the whole database but the new results will be calculated from the events. This creates a huge performance-gain with zero cost.

Use-Case-Example

Imagine you have a very big collection with many user-documents. At your page you want to display a toplist with users which have the most points and are currently logged in. You create a query and subscribe to it.

1const query = usersCollection.find().where('loggedIn').eq(true).sort('points');
2query.$.subscribe(users => {
3    document.querySelector('body').innerHTML = users
4        .reduce((prev, cur) => prev + cur.username+ '<br/>', '');
5});

As you may detect, the query can take very long time to run, because you have thousands of users in the collection. When a user now logs off, the whole query will re-run over the database which takes again very long.

1await anyUser.incrementalPatch({loggedIn: false});

But not with the EventReduce. Now, when one user logs off, it will calculate the new results from the current results plus the RxChangeEvent. This often can be done in-memory without making IO-requests to the storage-engine. EventReduce not only works on subscribed queries, but also when you do multiple .exec()'s on the same query.

Schema

Schemas are defined via jsonschema and are used to describe your data.

1const mySchema = {
2    title: "hero schema",
3    version: 0,                 // <- incremental version-number
4    description: "describes a simple hero",
5    primaryKey: 'name',         // <- 'name' is the primary key for the collection, it must be unique, required and of the type string 
6    type: "object",
7    properties: {
8        name: {
9            type: "string",
10            maxLength: 30
11        },
12        secret: {
13            type: "string",
14        },
15        skills: {
16            type: "array",
17            maxItems: 5,
18            uniqueItems: true,
19            item: {
20                type: "object",
21                properties: {
22                    name: {
23                        type: "string"
24                    },
25                    damage: {
26                        type: "number"
27                    }
28                }
29            }
30        }
31    },
32    required: ["color"],
33    encrypted: ["secret"] // <- this means that the value of this field is stored encrypted
34};

Mango / Chained queries

RxDB can be queried by standard NoSQL mango queries like you maybe know from other NoSQL Databases like mongoDB.

Also you can use the query-builder plugin to create chained mango-queries.

1
2// normal query
3myCollection.find({
4  selector: {
5    name: {
6      $ne: 'Alice'
7    },
8    age: {
9      $gt: 67
10    }
11  },
12  sort: [{ age: 'desc' }],
13  limit: 10
14})
15
16// chained query
17myCollection
18  .find()
19  .where('name').ne('Alice')
20  .where('age').gt(18).lt(67)
21  .limit(10)
22  .sort('-age')
23  .exec().then( docs => {
24    console.dir(docs);
25  });

Encryption

By setting a schema-field to encrypted, the value of this field will be stored in encryption-mode and can't be read without the password. Of course you can also encrypt nested objects. Example:

1{
2  "title": "my schema",
3  "properties": {
4    "secret": {
5      "type": "string",
6      "encrypted": true
7    }
8  },
9  "encrypted": [
10    "secret"
11  ]
12}

Import / Export

RxDB lets you import and export the whole database or single collections into json-objects. This is helpful to trace bugs in your application or to move to a given state in your tests.

1// export a single collection
2const jsonCol = await myCollection.dump();
3
4// export the whole database
5const jsonDB = await myDatabase.dump();
6
7// import the dump to the collection
8await emptyCollection.importDump(json);
9
10
11// import the dump to the database
12await emptyDatabase.importDump(json);

Key-Compression

Depending on which adapter and in which environment you use RxDB, client-side storage is limited in some way or the other. To save disc-space, RxDB uses a schema based keycompression to minimize the size of saved documents. This saves about 40% of used storage.

Example:

1// when you save an object with big keys
2await myCollection.insert({
3  firstName: 'foo'
4  lastName:  'bar'
5  stupidLongKey: 5
6});
7
8// key compression will internally transform it to
9{
10  '|a': 'foo'
11  '|b':  'bar'
12  '|c': 5
13}
14
15// so instead of 46 chars, the compressed-version has only 28
16// the compression works internally, so you can of course still access values via the original key.names and run normal queries.
17console.log(myDoc.firstName);
18// 'foo'

And for any other use case, there are many more plugins and addons.

Get started

Get started now by reading the docs or exploring the example-projects.

Support and Contribute

10

Maintained

Determines if the project is "actively maintained".

10

Dangerous-Workflow

Determines if the project's GitHub Action workflows avoid dangerous patterns.

10

License

Determines if the project has defined a license.

10

Packaging

Determines if the project is published as a package that others can easily download, install, easily update, and uninstall.

9

Binary-Artifacts

Determines if the project has generated executable (binary) artifacts in the source repository.

8

Vulnerabilities

Determines if the project has open, known unfixed vulnerabilities.

1

Code-Review

Determines if the project requires human code review before pull requests (aka merge requests) are merged.

0

CII-Best-Practices

Determines if the project has an OpenSSF (formerly CII) Best Practices Badge.

0

Security-Policy

Determines if the project has published a security policy.

0

Token-Permissions

Determines if the project's workflows follow the principle of least privilege.

0

Branch-Protection

Determines if the default and release branches are protected with GitHub's branch protection settings.

0

Pinned-Dependencies

Determines if the project has declared and pinned the dependencies of its build process.

Reason

dependency not pinned by hash detected -- score normalized to 0

Details

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Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/main.yml:188: update your workflow using https://app.stepsecurity.io/secureworkflow/pubkey/rxdb/main.yml/master?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/main.yml:190: update your workflow using https://app.stepsecurity.io/secureworkflow/pubkey/rxdb/main.yml/master?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/main.yml:195: update your workflow using https://app.stepsecurity.io/secureworkflow/pubkey/rxdb/main.yml/master?enable=pin
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Warn: third-party GitHubAction not pinned by hash: .github/workflows/main.yml:222: update your workflow using https://app.stepsecurity.io/secureworkflow/pubkey/rxdb/main.yml/master?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/main.yml:412: update your workflow using https://app.stepsecurity.io/secureworkflow/pubkey/rxdb/main.yml/master?enable=pin
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Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/prevent-commit-to-generated.yml:14: update your workflow using https://app.stepsecurity.io/secureworkflow/pubkey/rxdb/prevent-commit-to-generated.yml/master?enable=pin
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Warn: third-party GitHubAction not pinned by hash: .github/workflows/release.yml:131: update your workflow using https://app.stepsecurity.io/secureworkflow/pubkey/rxdb/release.yml/master?enable=pin
Warn: npmCommand not pinned by hash: examples/angular/reinstall.sh:7
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Warn: npmCommand not pinned by hash: .github/workflows/release.yml:73
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Info: 0 out of 64 GitHub-owned GitHubAction dependencies pinned
Info: 0 out of 28 third-party GitHubAction dependencies pinned
Info: 0 out of 49 npmCommand dependencies pinned

0

SAST

Determines if the project uses static code analysis.

0

Fuzzing

Determines if the project uses fuzzing.

Score

4.5

/10

Last Scanned on 2024-11-18

The Open Source Security Foundation is a cross-industry collaboration to improve the security of open source software (OSS). The Scorecard provides security health metrics for open source projects.

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rxdb-premium

Installations

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10

5,799

616

5,173

Issues

5

752

747

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Developer Guide

ESM

No

20.16.0

10.8.1

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Total Downloads

139,197

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A fast, local-first, reactive Database for JavaScript Applications

What is RxDB?

Multiplayer realtime applications

Replicate with your existing infrastructure

Flexible storage layer

Browsers Node.js React Native Capacitor NativeScript Flutter or as an Electron Database

Quick start

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Store data

Query data once

Observe a Query

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10

10

10

10

9

8

1

0

0

0

0

0

0

0

4.5

/10