Nanometer Process Machine


    1.0.3 • Public • Published

    Login Client

    Test and build GitHub package version NPM package name standard-readme compliant

    This repository offers a JavaScript client to be used with login-server.

    Table of Contents


    npm install gbv-login-client

    To include login-client via a CDN, see below.


    git clone
    cd login-client
    npm install
    npm run build

    esbuild is used to create builds for the browser. These are published to npm and can be used via a CDN like jsDelivr:

    <script src=""></script>

    Note: Always specify at least the major version number to avoid breaking your application. Also, it is recommended to use the full path in case you need to load the source maps for debugging.

    After that, the class LoginClient can be used like shown below. The lists of events and error types are also exported.


    // CJS
    const { LoginClient, events, errors } = require("gbv-login-client")
    // ES6
    import { LoginClient, events, errors } from "gbv-login-client"
    // Browser
    const { LoginClient, events, errors } = GLC
    // Second parameter is an options object with properties:
    // `ssl` (default: true), `retryMs` (default: 1000), `retryMsMax` (default: 30000), `retryMult` (default: 1.2), `pingInterval` (default: 10000)
    let client = new LoginClient("")
    // Add event listeners
    // Note: `event` always contains the property `event.type` which is the name of the event.
    client.addEventListener(events.connect, event => {
      // Fires when the client successfully connected.
      // `event` is empty.
    client.addEventListener(events.disconnect, event => {
      // Fires when the client disconnected.
      // `event` is empty.
    client.addEventListener(events.login, event => {
      // Fires when the user has logged in.
      // `event.user` contains the user object.
    client.addEventListener(events.logout, event => {
      // Fires when the user has logged out.
      // `event` is empty.
    client.addEventListener(events.update, event => {
      // Fires when the user was updated.
      // `event.user` contains the updated user object.
    client.addEventListener(events.providers, event => {
      // Fires when the providers were updated.
      // `event.providers` contains the updated providers list.
    client.addEventListener(events.about, event => {
      // Fires when the server's about information was updated.
      // `event` contains the information (e.g. `event.publicKey`).
    client.addEventListener(events.token, event => {
      // Fires when the token was updated.
      // `event.token` contains the updated token,
      // `event.expiresIn` contains the number of seconds the token will expire in.
    client.addEventListener(events.error, event => {
      // Fires when an error occurred.
      // `event.error` contains one of the following errors:
      // - errors.NoInternetConnectionError
      // - errors.ThirdPartyCookiesBlockedError
      // - errors.ServerConnectionError
    // (normally not used in production)
    client.addEventListener(events._sent, event => {
      // Fires when a message was sent through the WebSocket.
      // `event.message` contains the message that was sent.
    // (normally not used in production)
    client.addEventListener(events._received, event => {
      // Fires when a message was received through the WebSocket.
      // `event.message` contains the message that was received.
    // Alternatively, you can set an event listener for `null` which receives all events:
    client.addEventListener(null, event => {
      switch (event.type) {
        case events.connect:
          // ...
          // ...
    // Connect
    // Access properties
    client.decodedToken // Decoded, but not verified!
    // Additional methods
    client.setName("New Name")
    // Static properties // Object with available events (usage see above)
    LoginClient.errors // Object with available error classes
    LoginClient.jwtDecode // Access to jwtDecode function
    // If you eventually want to disconnect from login server (fires disconnect event one last time):

    The login-server contains a more comprehensive example at its /api endpoint. See its source code for details.

    v0 Compatibility

    gbv-login-client v1 changed how it is exported and therefore it needs to be included differently.

    // CommonJS
    // Previously: const LoginClient = require("gbv-login-client")
    // Now:
    const { LoginClient } = require("gbv-login-client")
    // or: const LoginClient = require("gbv-login-client").LoginClient
    // ES6
    // Previously: import LoginClient from "gbv-login-client"
    // Now:
    import { LoginClient } from "gbv-login-client"
    // Browser
    // Previously the class was globally available under `LoginClient`.
    // Now the module is available under `GLC` with `LoginClient` as one of its members. To easily make previous code compatible:
    const { LoginClient } = GLC

    Note that events and errors can also be imported directly, but are still available as members of LoginClient.


    npm test



    To publish a new version on npm after committing your changes, make sure you committed/merged all your changes to dev successfully and then run:

    npm run release:patch
    # or for minor release:
    # npm run release:minor
    # or for major release:
    # npm run release:major

    A new version will be published to npm automatically via GitHub Actions.


    PRs accepted.

    • Please implement your changes based on the current dev branch.
    • Please run the tests before committing.
    • Please do not skip the pre-commit hook when committing your changes.
    • If editing the README, please conform to the standard-readme specification.


    MIT © 2022- Verbundzentrale des GBV (VZG)




    npm i gbv-login-client

    DownloadsWeekly Downloads






    Unpacked Size

    210 kB

    Total Files


    Last publish


    • nichtich
    • stefandesu