mirror of
https://github.com/ThatGuySam/doesitarm.git
synced 2026-05-18 06:44:46 -07:00
485 lines
16 KiB
JavaScript
485 lines
16 KiB
JavaScript
// https://github.com/paulirish/lite-youtube-embed/blob/master/src/lite-yt-embed.js
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import canAutoPlay from 'can-autoplay'
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/**
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* A lightweight youtube embed. Still should feel the same to the user, just MUCH faster to initialize and paint.
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*
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* Thx to these as the inspiration
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* https://storage.googleapis.com/amp-vs-non-amp/youtube-lazy.html
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* https://autoplay-youtube-player.glitch.me/
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*
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* Once built it, I also found these:
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* https://github.com/ampproject/amphtml/blob/master/extensions/amp-youtube (👍👍)
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* https://github.com/Daugilas/lazyYT
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* https://github.com/vb/lazyframe
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*/
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function isObject( maybeObject ) {
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return maybeObject === Object( maybeObject )
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}
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class LiteYTEmbed extends HTMLElement {
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constructor() {
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// Always call super first in constructor
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super()
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this._uid = Date.now()
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this.$refs = {}
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this.$refs['timestamps-scroll-container'] = this.querySelector('.player-timestamps-wrapper')
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this.playerLoaded = false
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this.player = null
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this.playing = false
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this.progressInterval = null
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this.playerTime = 0
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this.preconnected = false
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this.highlightedTimestampElement = null
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}
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connectedCallback() {
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this.videoId = this.getAttribute('videoid')
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this.videoDataScript = this.querySelector('.video-data')
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this.video = JSON.parse( this.videoDataScript.innerHTML )
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this.playerContainer = this.querySelector('.player-container')
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this.playerPoster = this.querySelector('.player-poster')
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// console.log('canAutoPlay from connectedCallback', canAutoPlay)
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// console.log('video', this.video)
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// console.log('this.playerContainer', this.playerContainer)
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// Start watchers here
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// On hover (or tap), warm up the TCP connections we're (likely) about to use.
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this.playerContainer.addEventListener('pointerover', this.warmConnections, {once: true})
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if ( this.hasTimestamps() ) {
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// Array.from( this.querySelectorAll(`.player-timestamps [time]`) )
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this.timestamps().map( timestamp => {
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const timestampButton = this.querySelector(`.player-timestamps [time="${timestamp.time}"]`)
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timestampButton.addEventListener('click', e => {
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this.seekTo(timestamp.inSeconds)
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})
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})
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}
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// Once the user clicks, add the real iframe and drop our play button
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// TODO: In the future we could be like amp-youtube and silently swap in the iframe during idle time
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// We'd want to only do this for in-viewport or near-viewport ones: https://github.com/ampproject/amphtml/pull/5003
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this.playerPoster.addEventListener('click', e => {
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this.startPlayerLoad()
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})
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// Mounted
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this.detectAutoplay()
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.then( ({ willAutoplay }) => {
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// console.log('willAutoplay', willAutoplay)
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// If we're allowed to autoplay
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// then start loading the player
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if ( willAutoplay === true ) {
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this.startPlayerLoad()
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}
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})
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}
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// // TODO: Support the the user changing the [videoid] attribute
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// attributeChangedCallback() {
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// }
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/**
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* Add a <link rel={preload | preconnect} ...> to the head
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*/
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// static c(kind, url, as) {
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// const linkEl = document.createElement('link')
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// linkEl.rel = kind
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// linkEl.href = url
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// if (as) {
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// linkEl.as = as
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// }
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// document.head.append(linkEl)
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// }
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/**
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* Begin pre-connecting to warm up the iframe load
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* Since the embed's network requests load within its iframe,
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* preload/prefetch'ing them outside the iframe will only cause double-downloads.
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* So, the best we can do is warm up a few connections to origins that are in the critical path.
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*
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* Maybe `<link rel=preload as=document>` would work, but it's unsupported: http://crbug.com/593267
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* But TBH, I don't think it'll happen soon with Site Isolation and split caches adding serious complexity.
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*/
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// static warmConnections() {
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// if (LiteYTEmbed.preconnected) return
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// // The iframe document and most of its subresources come right off youtube.com
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// LiteYTEmbed.addPrefetch('preconnect', 'https://www.youtube-nocookie.com')
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// // The botguard script is fetched off from google.com
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// LiteYTEmbed.addPrefetch('preconnect', 'https://www.google.com')
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// // Not certain if these ad related domains are in the critical path. Could verify with domain-specific throttling.
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// LiteYTEmbed.addPrefetch('preconnect', 'https://googleads.g.doubleclick.net')
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// LiteYTEmbed.addPrefetch('preconnect', 'https://static.doubleclick.net')
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// LiteYTEmbed.preconnected = true
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// }
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addIframe() {
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const classNames = 'absolute inset-0 h-full w-full object-cover'
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// https://www.youtube-nocookie.com/embed/${video.id}?enablejsapi=1&autoplay=1&modestbranding=1&playsinline=1
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// const params = new URLSearchParams(this.getAttribute('params') || [])
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// params.append('autoplay', '1')
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const iframeEl = document.createElement('iframe')
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this.$refs['frame'] = iframeEl
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iframeEl.width = '100%'
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iframeEl.height = '100%'
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// No encoding necessary as [title] is safe. https://cheatsheetseries.owasp.org/cheatsheets/Cross_Site_Scripting_Prevention_Cheat_Sheet.html#:~:text=Safe%20HTML%20Attributes%20include
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// iframeEl.title = this.playLabel
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iframeEl.id = this.frameId()
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iframeEl.classList.add(...classNames.split(' '))
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iframeEl.frameborder = '0'
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iframeEl.allow = 'accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture'
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iframeEl.allowFullscreen = true
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// AFAIK, the encoding here isn't necessary for XSS, but we'll do it only because this is a URL
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// https://stackoverflow.com/q/64959723/89484
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iframeEl.src = `https://www.youtube-nocookie.com/embed/${encodeURIComponent(this.video.id)}?enablejsapi=1&autoplay=1&modestbranding=1&playsinline=1`
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// this.append(iframeEl)
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this.playerContainer.innerHTML = ''
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this.playerContainer.append( iframeEl )
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this.classList.add('lyt-activated')
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// Set focus for a11y
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this.querySelector('iframe').focus()
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}
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// Computed methods
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frameId = () => {
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return `youtube-player-${this.video.id}-${this._uid}`
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}
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timestamps = () => {
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return this.video.timestamps.map( timestamp => {
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const [ minutes, seconds ] = timestamp.time.split(':')
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return {
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...timestamp,
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inSeconds: (minutes * 60) + Number(seconds)
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}
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})
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}
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hasTimestamps = () => {
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return this.timestamps().length > 0
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}
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hasPlayer = () => {
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return this.player !== null
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}
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activeTimestamp = () => {
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const currentTime = this.playerTime// / 100
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const reversesTimestamps = [
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...this.timestamps()
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]
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// reversesTimestamps.reverse()
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let foundTimestamp = null
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for (const timestamp of reversesTimestamps) {
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const hasStarted = currentTime > 1
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const currentTimeisAfterPreviousTimestamp = (foundTimestamp !== null) ? currentTime > foundTimestamp.inSeconds : true
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// const isPastCurrentTime = currentTime > timestamp.inSeconds
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// const isBeforeCurrentTime = currentTime > timestamp.inSeconds
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const currentTimeIsBeforeThisTimestamp = currentTime < timestamp.inSeconds
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if (currentTimeisAfterPreviousTimestamp && currentTimeIsBeforeThisTimestamp) {
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return foundTimestamp
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}
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foundTimestamp = timestamp
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}
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// No active timestamp
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return null
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}
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highlightActiveTimestamp = () => {
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const activeClassList = 'border-opacity-100 bg-darkest'
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const inactiveClassList = 'border-opacity-0 neumorphic-shadow-inner'
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const activeTimestamp = this.activeTimestamp()
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// If there's no active timestamp
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// then stop
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if ( activeTimestamp === null ) return
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// console.log('activeTimestamp', activeTimestamp)
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if ( isObject( this.highlightedTimestampElement ) && this.highlightedTimestampElement.time === activeTimestamp.time) return
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// Change active timestamp
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const newActiveTimestamp = this.querySelector(`[time="${activeTimestamp.time}"]`)
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// If there's already a highlited time stamp
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// then unhighlight it
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if ( isObject( this.highlightedTimestampElement ) ) {
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this.highlightedTimestampElement.classList.remove(...activeClassList.split(' '))
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this.highlightedTimestampElement.classList.add(...inactiveClassList.split(' '))
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}
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newActiveTimestamp.classList.remove(...inactiveClassList.split(' '))
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newActiveTimestamp.classList.add(...activeClassList.split(' '))
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// Scroll to new timestamp
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this.scrollToTimestampButton( newActiveTimestamp )
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this.highlightedTimestampElement = newActiveTimestamp
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// console.log('newActiveTimestamp', newActiveTimestamp)
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// console.log('this.highlightedTimestampElement', this.highlightedTimestampElement)
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}
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scrollToTimestampButton ( timestampButton ) {
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// If timestamp button doesn't exist
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// then stop
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if ( !isObject( timestampButton ) ) return
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const timestampsScroller = this.$refs['timestamps-scroll-container']
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// const [ timestampButton ] = this.$refs[`timestamp-${timestamp.time}`]
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// https://stackoverflow.com/a/63773123/1397641
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const newScrollPosition = timestampButton.offsetLeft - timestampsScroller.offsetLeft
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// console.log('timestampsScroller', timestampsScroller)
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// console.log('timestampButton', timestampButton)
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// console.log('newScrollPosition', newScrollPosition)
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timestampsScroller.scroll({ left: newScrollPosition, behavior: 'smooth' })
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}
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detectAutoplay = async () => {
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// if ( !process.client ) return { willAutoplay: false }
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// const { default: canAutoPlay } = await import('can-autoplay')
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const willAutoplay = await canAutoPlay.video()
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// const willAutoplayMuted = await canAutoPlay.video({ muted: true, inline: true })
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return {
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willAutoplay: willAutoplay.result
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}
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}
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seekTo = async (timestampInSeconds) => {
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if (this.playerLoaded === false) {
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await this.startPlayerLoad()
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}
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this.player.seekTo(timestampInSeconds)
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}
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// async playVideo() {
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// if (this.playerLoaded === false) {
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// await this.startPlayerLoad()
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// }
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// this.$nextTick(() => {
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// // console.log('this.player', JSON.stringify(this.player))
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// this.player.playVideo()
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// })
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// },
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addPrefetch = (kind, url, as) => {
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// console.log('prefetching', url)
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const linkEl = document.createElement('link')
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linkEl.rel = kind
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linkEl.href = url
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if (as) {
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linkEl.as = as;
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}
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document.head.append(linkEl)
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}
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warmConnections = () => {
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if (this.preconnected) return
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console.log('Warming connections')
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// The iframe document and most of its subresources come right off youtube.com
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this.addPrefetch('preconnect', 'https://www.youtube-nocookie.com')
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// The botguard script is fetched off from google.com
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this.addPrefetch('preconnect', 'https://www.google.com')
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// Not certain if these ad related domains are in the critical path. Could verify with domain-specific throttling.
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this.addPrefetch('preconnect', 'https://googleads.g.doubleclick.net')
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this.addPrefetch('preconnect', 'https://static.doubleclick.net')
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this.preconnected = true
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}
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startPlayerLoad = async () => {
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// console.log('Starting player load')
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this.addIframe()
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this.playerLoaded = true
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await this.initializePlayer()
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// this.$nextTick(() => {
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// this.initializePlayer()
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// })
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}
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initializePlayer = async () => {
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console.log('Initializing player')
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// Clear player
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this.player = null
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// Clear progession interval
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clearInterval(this.progressInterval)
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// If there are no timestamps
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// then stop
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if ( !this.hasTimestamps() ) {
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console.log('No timestamps. Skipping Youtube API initialization')
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this.playerLoaded = true
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return
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}
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if (typeof YT === 'undefined') {
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await this.initializeApi()
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}
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const stateHandlers = {
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// unstarted
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'-1': () => null,
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// ended
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'0': () => null,
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// playing
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'1': this.onPlayerPlaying,
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// paused
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'2': this.onPlayerPaused,
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// buffering
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'3': () => null,
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// video cued
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'4': () => null,
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}
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// console.log('frame', this.$refs['frame'])
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// console.log('frame id', this.$refs['frame'].id)
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const onReady = () => new Promise( resolve => {
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// console.log('Started onReady')
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this.player = new YT.Player(this.$refs['frame'].id, {
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events: {
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'onReady': readyEvent => {
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// console.log('Resolving onReady')
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this.onPlayerReady( readyEvent )
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resolve( readyEvent )
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},
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'onStateChange': event => {
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// console.log('state changed', event)
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const stateHandler = stateHandlers[String(event.data)]
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// console.log('stateHandler', stateHandler)
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stateHandler(event)
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}
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}
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})
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})
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// console.log('Waiting for ready')
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const readyEvent = await onReady()
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// console.log('Youtube Player API ready', readyEvent, JSON.stringify(this.player))
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}
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initializeApi = () => {
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return new Promise( resolve => {
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const tag = document.createElement('script')
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tag.id = `youtube-api-script-${this._uid}`
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tag.src = 'https://www.youtube.com/iframe_api'
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const firstScriptTag = document.getElementsByTagName('script')[0]
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firstScriptTag.parentNode.insertBefore(tag, firstScriptTag)
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window.onYouTubeIframeAPIReady = resolve
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})
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}
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onPlayerPlaying = () => {
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// console.log('Player playing')
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this.playing = true
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this.progressInterval = setInterval(() => {
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// console.log('this.player.getCurrentTime()', this.player.getCurrentTime())
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// If player is empty
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// then stop
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if (this.player === null) {
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clearInterval(this.progressInterval)
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return
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}
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// console.log('this.player', this.player.hasOwnProperty('getCurrentTime'))
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this.playerTime = this.player.getCurrentTime()
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this.highlightActiveTimestamp()
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}, 500)
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}
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onPlayerPaused = () => {
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console.log('Player paused')
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this.playing = false
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clearInterval(this.progressInterval)
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}
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onPlayerReady (event) {
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// console.log('Player is ready', event, this.player )
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}
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}
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// Register custom element
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window.customElements.define('lite-youtube', LiteYTEmbed)
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