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pusher-js

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pusher-js

Pusher Channels JavaScript library for browsers, React Native, NodeJS and web workers


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581K
decreased by-6.52%
Maintainers
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What is pusher-js?

The pusher-js npm package is a JavaScript library for integrating real-time functionality into web and mobile applications. It allows developers to subscribe to channels and bind to events to receive real-time updates, making it ideal for applications that require live data feeds, notifications, and interactive features.

What are pusher-js's main functionalities?

Real-time Event Subscription

This feature allows you to subscribe to a channel and bind to specific events to receive real-time updates. The code sample demonstrates how to initialize Pusher, subscribe to a channel, and bind to an event to log received data.

const Pusher = require('pusher-js');
const pusher = new Pusher('YOUR_APP_KEY', {
  cluster: 'YOUR_APP_CLUSTER'
});
const channel = pusher.subscribe('my-channel');
channel.bind('my-event', function(data) {
  console.log('Received data:', data);
});

Presence Channels

Presence channels build on the functionality of public channels by allowing you to keep track of who is subscribed to the channel. The code sample shows how to subscribe to a presence channel and bind to events for when members are added or removed.

const Pusher = require('pusher-js');
const pusher = new Pusher('YOUR_APP_KEY', {
  cluster: 'YOUR_APP_CLUSTER'
});
const presenceChannel = pusher.subscribe('presence-my-channel');
presenceChannel.bind('pusher:subscription_succeeded', function(members) {
  console.log('Members:', members);
});
presenceChannel.bind('pusher:member_added', function(member) {
  console.log('Member added:', member);
});
presenceChannel.bind('pusher:member_removed', function(member) {
  console.log('Member removed:', member);
});

Private Channels

Private channels provide an extra layer of security by requiring authentication before subscribing. The code sample demonstrates how to subscribe to a private channel and bind to an event to log received data.

const Pusher = require('pusher-js');
const pusher = new Pusher('YOUR_APP_KEY', {
  cluster: 'YOUR_APP_CLUSTER',
  authEndpoint: '/pusher/auth'
});
const privateChannel = pusher.subscribe('private-my-channel');
privateChannel.bind('my-event', function(data) {
  console.log('Received data:', data);
});

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Package last updated on 01 Dec 2023

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