109 lines
3.3 KiB
JavaScript
109 lines
3.3 KiB
JavaScript
var qs = document.querySelector.bind(document)
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var qsa = document.querySelectorAll.bind(document)
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var $$wrappers = qsa('#home-hero .videos > div') // all the wrappers for the videos
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var $$videos = qsa('#home-hero video') // all the videos
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var $$videoControls = qsa('#home-hero .controls > div') // carousel controllers
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var currentIndex = 1 // currently playing video
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var playbackRate = 2 // video playback speed
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// initiate a video change
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function initiateVideoChange(index) {
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var wrapper = $$wrappers[currentIndex]
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var nextWrapper = $$wrappers[index]
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// pause the current video
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$$videos[currentIndex].pause()
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// deactivate the current video
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wrapper.classList.remove('active')
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wrapper.classList.add('deactivate')
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// after the current video animates out...
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setTimeout(function() {
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// remove transition effect so progress-bar doesn't slowly decline
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var loadingBar = $$videoControls[currentIndex].querySelector(
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'.progress-bar span'
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)
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loadingBar.style.transitionDuration = '0s'
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// reset the current video
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if (!isNaN($$videos[currentIndex].duration)) {
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$$videos[currentIndex].currentTime = 0
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}
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$$videoControls[currentIndex].classList.remove('playing')
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// stop deactivation
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wrapper.classList.remove('deactivate')
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// check if the video is loaded
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// if not, listen for it to load
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if ($$videos[index].classList.contains('loaded')) {
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playVideo(index, nextWrapper)
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} else {
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$$videos[index].addEventListener(
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'canplaythrough',
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playVideo(index, nextWrapper)
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)
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}
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}, 1000)
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}
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// activate and play a video
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function playVideo(index, wrapper) {
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// toggle
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$$videos[index].classList.add('loaded')
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// activate the next video and start playing it
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wrapper.classList.add('active')
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$$videoControls[index].classList.add('playing')
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$$videos[index].play()
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$$videoControls[index].querySelector(
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'.progress-bar span'
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).style.transitionDuration =
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Math.ceil($$videos[index].duration / playbackRate).toString() + 's'
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// set the currentIndex to be that of the current video's index
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currentIndex = index
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}
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function initiateVideos() {
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// remove 'active' from wrappers which may be
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// there on page load because of turbolinks
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for (var i = 0; i < $$wrappers.length; i++) {
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$$wrappers[i].classList.remove('active')
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}
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// loop through videos to set up options/listeners
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for (var i = 0; i < $$videos.length; i++) {
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// set video default speed
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$$videos[i].playbackRate = playbackRate
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// listen for video ending, then go to the next video
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$$videos[i].addEventListener('ended', function() {
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var nextIndex = currentIndex + 1
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initiateVideoChange(nextIndex < $$videos.length ? nextIndex : 0)
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})
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}
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for (var i = 0; i < $$videoControls.length; i++) {
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// remove 'playing' from controls which may be
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// there on page load because of turbolinks
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$$videoControls[i].classList.remove('playing')
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// listen for control clicks and initiate videos appropriately
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$$videoControls[i].addEventListener('click', function() {
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if (!this.classList.contains('playing')) {
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initiateVideoChange(this.dataset.index)
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}
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})
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}
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// go to first video to start this thing
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if ($$videos.length > 0) {
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initiateVideoChange(0)
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}
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}
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document.addEventListener('turbolinks:load', initiateVideos) |