Radio4000 Player

This is a web component that plays channels from Radio4000. It uses the public radio4000-api and Vue.js.

How to use

You can load the player with a CDN, like this:

<script async src=""></script>
<radio4000-player channel-slug="good-time-radio"></radio4000-player>

OR, you can use a package manager:

// npm install radio4000-player
import 'radio4000-player'
// now you can use <radio4000-player> in your templates

OR, you can use an iframe (source):

<iframe src="" width="320" height="500" frameborder="0"></iframe>


Here's a complete list of all the attributes you can set and change on the web component. These do not affect the iframe version.

Attribute Type Description
channel-slug string Radio4000 channel slug (ex: oskar)
channel-id string Radio4000 channel id (ex: -JYZvhj3vlGCjKXZ2cXO)
track-id string Radio4000 track id (ex: -JYEosmvT82Ju0vcSHVP)
volume integer from 0 to 100 (default: 100)
autoplay boolean if it should start playing automatically (default: false)
shuffle boolean if tracks should be shuffled (default: false)


Remember that HTML attributes are dasherized channel-slug whereas JavaScript expects CamelCase channelSlug.

var player = document.querySelector('radio4000-player')

// Load radio channel either by slug or id.
player.channelSlug = 'sugar-hiccup'
player.channelId = '-JYZvhj3vlGCjKXZ2cXO'

// Load a specific track.
player.trackId = '-JYEosmvT82Ju0vcSHVP'

// Change the volume.
player.volume = 25

// Enable shuffle.
player.shuffle = true

To enable autoplay:

<radio4000-player channel-slug="200ok" autoplay="true"></radio4000-player>


You can listen for events directly on each <radio4000-player> element.

  • trackChanged - This event fires whenever the current track is
    changed. It is an object containing two track objects,
    previousTrack and track
  • trackEnded - This event fires when the current track finishes
    playing. It is an object containing one track object.
  • mediaNotAvailable - This event fires when a track could not be
    played by its provider player (youtube etc.), since its media for
    not available to be played. It is an object containing one track
    object, the track which youtube video could not be played. Youtube
    does not give much detail about "why" a media could not be player,
    in the event sent by their javascript player. In you application you
    could make a call to youtube's apis to get more info about a track,
    and figure out why, with a request such as the following.
# unrelated example of an HTTP query to Youtube api for details about
a video (replace `YOUTUBE_API_KEY` and `YOUTUBE_VIDEO_ID`)

Here's an example of how to listen for the trackChanged event. It is the same approach for all events. In the case of both trackChanged and trackEnded, the event.detail[0] argument will be a Radio4000 track object.

var player = document.querySelector('radio4000-player')
player.addEventListener('trackChanged', (event) => {'trackChanged event', event.detail[0])
  // { track: { [...] } }


Danger zone. We are still finalizing the API for methods so except this to change.

// Get access to the Vue component behind the web component to access methods.
var player = document.querySelector('radio4000-player')
var vue = player.__vue_custom_element__.$children[0]

var tracks = [
		id: 'uniqueId',
		title: 'A title to display',
		url: 'an url to link to in the track list',
		ytid: 'an id to the youtube video'

var playlist = {
	title: `A title for this list`,
	image: '',
	tracks: tracks


If the playlist object contains a query string it will be shown on top of the track list.

If this player is used inside, we want the links to switch URL internally.
For that you can use the boolean property r4-url like so.

<radio4000-player r4-url="true"></radio4000-player>

Therefore, URLs in the player header won't open new browser window but will just replace the URL like Ember router would have done.


  • Feature branches are made from the master branch.
  • production branch is used for the production version releases.
# 1. clone and install dependencies
git clone [email protected]:internet4000/radio4000-player.git

# 2. starts a server on http://localhost:4002 that autobuilds when files change
yarn start


# run tests once
yarn test

# (re)run tests as files change
yarn start; yarn cypress open

How to release a new version

Release a new patch e.g. 1.0.4 to 1.0.5.

yarn release

Release a minor, major, or specific version:

yarn release minor
yarn release major
yarn release 0.8.3