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yt-player ci npm downloads javascript style guide

Simple, robust, blazing-fast YouTube Player API

This package is used on Play.cash.

Install

npm install yt-player

If you do not use a bundler, you can use the standalone script directly in a <script> tag.

Why this package?

Most of the existing YouTube API packages on npm are incomplete or overcomplicated.

Note: It is irresponsible to publish a package that requires all of babel-runtime, lodash, and 20KB of other nonsense to do a simple task. Using fancy dependencies doesn't make you a better programmer, and it's certainly not a "best practice" to ship tons of extra code to your website visitors. Less is more. 🔥

Features

  • Powered by the YouTube IFrame Player API
  • Lightweight - only 3.14kb gzipped and minified!
  • Extremely fast time-to-first-frame
    • YouTube IFrame API <script> is automatically loaded on first use
    • For even faster start time, add <script src='https://www.youtube.com/iframe_api' async></script> to your page
    • Automatically detects the presence of the API <script> so API is never loaded twice
  • API commands are automatically queued (until both the Iframe API and Player instance are ready)
  • Differentiate between fatal errors and unplayable video errors
  • Adds the all-important 'timeupdate' event, which the YouTube API lacks
  • Well-commented codebase makes it easy to understand what's going on
  • No large dependencies or unused code
  • Note: no support for old browsers (e.g. IE11 and below)

Usage

const YTPlayer = require('yt-player')
const player = new YTPlayer('#player')

player.load('GKSRyLdjsPA')
player.setVolume(100)

player.on('playing', () => {
  console.log(player.getDuration()) // => 351.521
})

API

player = new YTPlayer(element, [opts])

Create a new YouTube player. The player will take the place of the HTML element element. Alternatively, element can be a selector string, which will be passed to document.querySelector().

Examples: #player, .youtube-player, or a DOM node.

Optionally, provide an options object opts to customize the player.

opts.width (number)

This parameter indicates the width of the player.

opts.height (number)

This parameter indicates the height of the player.

opts.autoplay (boolean)

This parameter indicates whether the initial video will automatically start to play when the player loads. The default value is false.

opts.captions (string/boolean)

This parameter indicates the language of the closed captions that should be shown. The default behavior is based on user preference. The parameter value is an ISO 639-1 two-letter language code or a fully specified locale. Or, set to false to force captions to be disabled, ignoring the user preference.

opts.controls (boolean)

This parameter indicates whether the video player controls are displayed. The default value is true.

opts.keyboard (boolean)

This parameter indicates whether the player will respond to keyboard shortcuts. The default value is true.

opts.fullscreen (boolean)

This parameter indicates whether the player will show a fullscreen button. The default value is true.

opts.annotations (boolean)

This parameter indicates whether the player will show video annotations. The default value is true.

opts.modestBranding (boolean)

This parameter lets you use a YouTube player that does not show a YouTube logo. Even when this option is enabled, a small YouTube text label will still display in the upper-right corner of a paused video when the user's mouse pointer hovers over the player. The default value is false.

opts.related (boolean)

This parameter indicates whether the player should show related videos from the same channel (false) or from any channel (true) when playback of the video ends. The default value is true.

opts.timeupdateFrequency (number)

The time between onTimeupdate callbacks, in milliseconds. Default is 1000.

See: YT.Player parameters and playerVars parameters for additional documentation about these parameters.

opts.playsInline (boolean)

This parameter controls whether videos play inline or fullscreen in an HTML5 player on iOS. Default is true.

opts.start (number)

This parameter causes the player to begin playing the video at the given number of seconds from the start of the video. The parameter value is a positive integer. Note that the player will look for the closest keyframe to the time you specify. This means that sometimes the play head may seek to just before the requested time, usually no more than around two seconds. Default is 0.

opts.host (string)

This parameter controls the hostname that videos are loaded from. Set to 'https://www.youtube-nocookie.com' for enhanced privacy. The default value is 'https://youtube.com'.

player.load(videoId, [autoplay, [start]])

This function loads the specified videoId. An example of a videoId is 'GKSRyLdjsPA'.

Optionally, specify an autoplay parameter to indicate whether the video should begin playing immediately, or wait for a call to player.play(). Default is false. The optional start parameter accepts a float/integer. If it is specified, then the video will start from the closest keyframe to the specified time.

This should be the first function called on a new Player instance.

player.play()

Plays the currently loaded video.

player.pause()

Pauses the currently loaded video.

player.stop()

Stops and cancels loading of the current video. This function should be reserved for rare situations when you know that the user will not be watching additional video in the player. If your intent is to pause the video, you should just call pause(). If you want to change the video that the player is playing, you can call load() without calling stop() first.

player.seek(seconds)

Seeks to a specified time in the video. If the player is paused when the function is called, it will remain paused. If the function is called from another state (playing, video cued, etc.), the player will play the video. The player will advance to the closest keyframe before that time unless the player has already downloaded the portion of the video to which the user is seeking.

player.setVolume(volume)

Sets the volume. Accepts an integer between 0 and 100.

player.getVolume()

Returns the player's current volume, an integer between 0 and 100. Note that getVolume() will return the volume even if the player is muted.

player.mute()

Mutes the player.

player.unMute()

Unmutes the player.

player.isMuted()

Returns true if the player is muted, false if not.

player.setSize(width, height)

Sets the size in pixels of the <iframe> that contains the player.

player.setPlaybackRate(rate)

This function sets the suggested playback rate for the current video. If the playback rate changes, it will only change for the video that is already being played. Calling load() will reset the playback rate to 1.

player.setPlaybackQuality(suggestedQuality)

This function sets the suggested video quality for the current video. The function causes the video to reload at its current position in the new quality. If the playback quality does change, it will only change for the video being played. Calling this function does not guarantee that the playback quality will actually change. However, if the playback quality does change, the 'playbackqualitychange' event will fire, and your code should respond to the event rather than the fact that it called the setPlaybackQuality function.

The suggestedQuality parameter value can be 'small', 'medium', 'large', 'hd720', 'hd1080', 'highres' or 'default'. We recommend that you set the parameter value to 'default', which instructs YouTube to select the most appropriate playback quality, which will vary for different users, videos, systems and other playback conditions.

If you call the setPlaybackQuality function with a suggestedQuality level that is not available for the video, then the quality will be set to the next lowest level that is available. In addition, setting suggestedQuality to a value that is not a recognized quality level is equivalent to setting suggestedQuality to 'default'.

player.getPlaybackRate()

This function retrieves the playback rate of the currently playing video. The default playback rate is 1, which indicates that the video is playing at normal speed. Playback rates may include values like 0.25, 0.5, 1, 1.5, and 2.

player.getAvailablePlaybackRates()

This function returns the set of playback rates in which the current video is available. The default value is 1, which indicates that the video is playing in normal speed.

The function returns an array of numbers ordered from slowest to fastest playback speed. Even if the player does not support variable playback speeds, the array should always contain at least one value (1).

player.getDuration()

Returns the duration in seconds of the currently playing video. Note that getDuration() will return 0 until the video's metadata is loaded, which normally happens just before the video starts playing.

player.getProgress()

Returns a number between 0 and 1 that specifies the percentage of the video that the player shows as buffered.

player.getState()

Returns the state of the player. Possible values are: 'unstarted', 'ended', 'playing', 'paused', 'buffering', or 'cued'.

player.getCurrentTime()

Returns the elapsed time in seconds since the video started playing.

player.destroy()

Removes the <iframe> containing the player and cleans up all resources.

player.destroyed (boolean)

Returns true if destroy() has been called on the player.

player.videoId (string)

Returns the currently loaded video ID, i.e. what was passed to load().

player.on('error', (err) => {})

This event fires if a fatal error occurs in the player. This does not include videos that fail to play, for whatever reason.

player.on('unplayable', (videoId) => {})

This event fires if the YouTube player cannot play the given video. This is not a fatal error. This event is reported separately from the 'error' event so there is an opportunity to play another video gracefully.

Possible reasons for this error:

  • The video requested was not found. This error occurs when a video has been removed (for any reason) or has been marked as private.

  • The owner of the requested video does not allow it to be played in embedded players.

  • The request contains an invalid parameter value. For example, this error occurs if you specify a videoId that does not have 11 characters, or if the videoId contains invalid characters, such as exclamation points or asterisks.

player.on('timeupdate', (seconds) => {})

This event fires when the time indicated by the getCurrentTime() method has been updated.

player.on('unstarted', () => {})

player.on('ended', () => {})

player.on('playing', () => {})

player.on('paused', () => {})

player.on('buffering', () => {})

player.on('cued', () => {})

These events fire when the player enters the respective state. These event names are the same as the possible return values from player.getState().

When the player first loads a video, it will broadcast an unstarted event. When a video is cued and ready to play, the player will broadcast a cued event.

player.on('playbackQualityChange', (quality) => {})

This event fires whenever the video playback quality changes. Possible values are: 'small', 'medium', 'large', 'hd720', 'hd1080', 'highres'.

player.on('playbackRateChange', (playbackRate) => {})

This event fires whenever the video playback rate changes.

License

MIT. Copyright (c) Feross Aboukhadijeh.