| 1 |
(function () { |
| 2 |
'use strict'; |
| 3 |
|
| 4 |
function clamp(n, min, max) { |
| 5 |
n = parseFloat(n); |
| 6 |
if (isNaN(n)) n = min; |
| 7 |
return Math.max(min, Math.min(max, n)); |
| 8 |
} |
| 9 |
|
| 10 |
function buildSrc(root) { |
| 11 |
var id = root.getAttribute('data-video-id') || ''; |
| 12 |
if (!id) return ''; |
| 13 |
|
| 14 |
var privacy = root.getAttribute('data-privacy') === '1'; |
| 15 |
var host = privacy ? 'https://www.youtube-nocookie.com' : 'https://www.youtube.com'; |
| 16 |
|
| 17 |
var controls = root.getAttribute('data-controls') === '1'; |
| 18 |
var rel = root.getAttribute('data-rel') === '1'; |
| 19 |
var mute = root.getAttribute('data-mute') === '1'; |
| 20 |
var loop = root.getAttribute('data-loop') === '1'; |
| 21 |
var start = clamp(root.getAttribute('data-start') || 0, 0, 86400); |
| 22 |
|
| 23 |
var params = []; |
| 24 |
params.push('autoplay=1'); |
| 25 |
params.push('controls=' + (controls ? '1' : '0')); |
| 26 |
params.push('rel=' + (rel ? '1' : '0')); |
| 27 |
if (mute) params.push('mute=1'); |
| 28 |
if (start > 0) params.push('start=' + Math.floor(start)); |
| 29 |
if (loop) { |
| 30 |
params.push('loop=1'); |
| 31 |
params.push('playlist=' + encodeURIComponent(id)); |
| 32 |
} |
| 33 |
|
| 34 |
return host + '/embed/' + encodeURIComponent(id) + '?' + params.join('&'); |
| 35 |
} |
| 36 |
|
| 37 |
function fallbackPosterImg(img) { |
| 38 |
if (!img || !img.getAttribute) return; |
| 39 |
img.addEventListener('error', function () { |
| 40 |
var src = img.getAttribute('src') || ''; |
| 41 |
if (src.indexOf('maxresdefault.jpg') !== -1) { |
| 42 |
img.setAttribute('src', src.replace('maxresdefault.jpg', 'hqdefault.jpg')); |
| 43 |
} |
| 44 |
}); |
| 45 |
} |
| 46 |
|
| 47 |
function initOne(root) { |
| 48 |
if (!root || root.__bkbgYtpInit) return; |
| 49 |
root.__bkbgYtpInit = true; |
| 50 |
|
| 51 |
var btn = root.querySelector('.bkbg-ytp-play'); |
| 52 |
var mount = root.querySelector('.bkbg-ytp-embed'); |
| 53 |
var posterImg = root.querySelector('.bkbg-ytp-poster-img'); |
| 54 |
|
| 55 |
if (posterImg) fallbackPosterImg(posterImg); |
| 56 |
|
| 57 |
if (!btn || !mount) return; |
| 58 |
|
| 59 |
function play() { |
| 60 |
if (root.classList.contains('is-playing')) return; |
| 61 |
var src = buildSrc(root); |
| 62 |
if (!src) return; |
| 63 |
|
| 64 |
var iframe = document.createElement('iframe'); |
| 65 |
iframe.className = 'bkbg-ytp-iframe'; |
| 66 |
iframe.src = src; |
| 67 |
iframe.title = 'YouTube video'; |
| 68 |
iframe.allow = 'accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share'; |
| 69 |
iframe.allowFullscreen = true; |
| 70 |
|
| 71 |
mount.innerHTML = ''; |
| 72 |
mount.appendChild(iframe); |
| 73 |
|
| 74 |
root.classList.add('is-playing'); |
| 75 |
} |
| 76 |
|
| 77 |
btn.addEventListener('click', function (e) { |
| 78 |
e.preventDefault(); |
| 79 |
play(); |
| 80 |
}); |
| 81 |
|
| 82 |
btn.addEventListener('keydown', function (e) { |
| 83 |
var key = e.key || e.code; |
| 84 |
if (key === 'Enter' || key === ' ' || key === 'Spacebar') { |
| 85 |
e.preventDefault(); |
| 86 |
play(); |
| 87 |
} |
| 88 |
}); |
| 89 |
} |
| 90 |
|
| 91 |
function initAll() { |
| 92 |
var nodes = document.querySelectorAll('.bkbg-ytp-wrap'); |
| 93 |
for (var i = 0; i < nodes.length; i++) initOne(nodes[i]); |
| 94 |
} |
| 95 |
|
| 96 |
if (document.readyState === 'loading') { |
| 97 |
document.addEventListener('DOMContentLoaded', initAll); |
| 98 |
} else { |
| 99 |
initAll(); |
| 100 |
} |
| 101 |
})(); |
| 102 |
|
