Prepare to use lite-youtube-embed for those posts embedding a YouTube video
This commit is contained in:
parent
3777a8725b
commit
d59a03906a
38
_layouts/post-yt.liquid
Normal file
38
_layouts/post-yt.liquid
Normal file
|
|
@ -0,0 +1,38 @@
|
|||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
{% include "_head.liquid" %}
|
||||
<link rel="stylesheet" href="/lite-yt-embed.css" type="text/css" media="all">
|
||||
<script defer src="/lite-yt-embed.js"></script>
|
||||
</head>
|
||||
<body>
|
||||
{% include "_menu.liquid" %}
|
||||
|
||||
<main>
|
||||
<article>
|
||||
<h1>{{ page.title }}</h1>
|
||||
{% assign reading_wpm = 200 %}
|
||||
{% assign word_count = page.content | split: " " | size %}
|
||||
{% assign reading_time = word_count | divided_by: 200 %}
|
||||
{% if reading_time < 1%}
|
||||
{% assign reading_time = 1 %}
|
||||
{% endif %}
|
||||
{% assign phrase = " minute read" | prepend: reading_time %}
|
||||
|
||||
<div class="metadata">
|
||||
<time pubdate="pubdate">{{ page.published_date | date: "%b %d, %Y" }} · {{ phrase }}</time>
|
||||
|
||||
{% if page.data and page.data.tags -%}
|
||||
{%- for tag in page.data.tags %}
|
||||
· <a href="/tagged/{{ tag }}.html">{{ tag }}</a>
|
||||
{%- endfor %}
|
||||
{%- endif -%}
|
||||
</div>
|
||||
|
||||
{{ page.content }}
|
||||
</article>
|
||||
</main>
|
||||
|
||||
{% include "_footer.liquid" %}
|
||||
</body>
|
||||
</html>
|
||||
86
lite-yt-embed.css
Normal file
86
lite-yt-embed.css
Normal file
|
|
@ -0,0 +1,86 @@
|
|||
lite-youtube {
|
||||
background-color: #000;
|
||||
position: relative;
|
||||
display: block;
|
||||
contain: content;
|
||||
background-position: center center;
|
||||
background-size: cover;
|
||||
cursor: pointer;
|
||||
max-width: 720px;
|
||||
}
|
||||
|
||||
/* gradient */
|
||||
lite-youtube::before {
|
||||
content: '';
|
||||
display: block;
|
||||
position: absolute;
|
||||
top: 0;
|
||||
background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAADGCAYAAAAT+OqFAAAAdklEQVQoz42QQQ7AIAgEF/T/D+kbq/RWAlnQyyazA4aoAB4FsBSA/bFjuF1EOL7VbrIrBuusmrt4ZZORfb6ehbWdnRHEIiITaEUKa5EJqUakRSaEYBJSCY2dEstQY7AuxahwXFrvZmWl2rh4JZ07z9dLtesfNj5q0FU3A5ObbwAAAABJRU5ErkJggg==);
|
||||
background-position: top;
|
||||
background-repeat: repeat-x;
|
||||
height: 60px;
|
||||
padding-bottom: 50px;
|
||||
width: 100%;
|
||||
transition: all 0.2s cubic-bezier(0, 0, 0.2, 1);
|
||||
}
|
||||
|
||||
/* responsive iframe with a 16:9 aspect ratio
|
||||
thanks https://css-tricks.com/responsive-iframes/
|
||||
*/
|
||||
lite-youtube::after {
|
||||
content: "";
|
||||
display: block;
|
||||
padding-bottom: calc(100% / (16 / 9));
|
||||
}
|
||||
lite-youtube > iframe {
|
||||
width: 100%;
|
||||
height: 100%;
|
||||
position: absolute;
|
||||
top: 0;
|
||||
left: 0;
|
||||
border: 0;
|
||||
}
|
||||
|
||||
/* play button */
|
||||
lite-youtube > .lty-playbtn {
|
||||
display: block;
|
||||
width: 68px;
|
||||
height: 48px;
|
||||
position: absolute;
|
||||
cursor: pointer;
|
||||
transform: translate3d(-50%, -50%, 0);
|
||||
top: 50%;
|
||||
left: 50%;
|
||||
z-index: 1;
|
||||
background-color: transparent;
|
||||
/* YT's actual play button svg */
|
||||
background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 68 48"><path d="M66.52 7.74c-.78-2.93-2.49-5.41-5.42-6.19C55.79.13 34 0 34 0S12.21.13 6.9 1.55c-2.93.78-4.63 3.26-5.42 6.19C.06 13.05 0 24 0 24s.06 10.95 1.48 16.26c.78 2.93 2.49 5.41 5.42 6.19C12.21 47.87 34 48 34 48s21.79-.13 27.1-1.55c2.93-.78 4.64-3.26 5.42-6.19C67.94 34.95 68 24 68 24s-.06-10.95-1.48-16.26z" fill="red"/><path d="M45 24 27 14v20" fill="white"/></svg>');
|
||||
filter: grayscale(100%);
|
||||
transition: filter .1s cubic-bezier(0, 0, 0.2, 1);
|
||||
border: none;
|
||||
}
|
||||
|
||||
lite-youtube:hover > .lty-playbtn,
|
||||
lite-youtube .lty-playbtn:focus {
|
||||
filter: none;
|
||||
}
|
||||
|
||||
/* Post-click styles */
|
||||
lite-youtube.lyt-activated {
|
||||
cursor: unset;
|
||||
}
|
||||
lite-youtube.lyt-activated::before,
|
||||
lite-youtube.lyt-activated > .lty-playbtn {
|
||||
opacity: 0;
|
||||
pointer-events: none;
|
||||
}
|
||||
|
||||
.lyt-visually-hidden {
|
||||
clip: rect(0 0 0 0);
|
||||
clip-path: inset(50%);
|
||||
height: 1px;
|
||||
overflow: hidden;
|
||||
position: absolute;
|
||||
white-space: nowrap;
|
||||
width: 1px;
|
||||
}
|
||||
129
lite-yt-embed.js
Normal file
129
lite-yt-embed.js
Normal file
|
|
@ -0,0 +1,129 @@
|
|||
/**
|
||||
* From https://github.com/paulirish/lite-youtube-embed/commit/32f4a55192a1fc4d4ed063122986a86be74008b2
|
||||
* License: Apache License v2.0
|
||||
* See https://github.com/paulirish/lite-youtube-embed/blob/32f4a55192a1fc4d4ed063122986a86be74008b2/LICENSE
|
||||
* Copyright 2019 Paul Irish
|
||||
* Modifications:
|
||||
* * not pre-fetching ad hosts
|
||||
*
|
||||
* ---
|
||||
*
|
||||
*
|
||||
*
|
||||
* A lightweight youtube embed. Still should feel the same to the user, just MUCH faster to initialize and paint.
|
||||
*
|
||||
* Thx to these as the inspiration
|
||||
* https://storage.googleapis.com/amp-vs-non-amp/youtube-lazy.html
|
||||
* https://autoplay-youtube-player.glitch.me/
|
||||
*
|
||||
* Once built it, I also found these:
|
||||
* https://github.com/ampproject/amphtml/blob/master/extensions/amp-youtube (👍👍)
|
||||
* https://github.com/Daugilas/lazyYT
|
||||
* https://github.com/vb/lazyframe
|
||||
*/
|
||||
class LiteYTEmbed extends HTMLElement {
|
||||
connectedCallback() {
|
||||
this.videoId = this.getAttribute('videoid');
|
||||
|
||||
let playBtnEl = this.querySelector('.lty-playbtn');
|
||||
// A label for the button takes priority over a [playlabel] attribute on the custom-element
|
||||
this.playLabel = (playBtnEl && playBtnEl.textContent.trim()) || this.getAttribute('playlabel') || 'Play';
|
||||
|
||||
/**
|
||||
* Lo, the youtube placeholder image! (aka the thumbnail, poster image, etc)
|
||||
*
|
||||
* See https://github.com/paulirish/lite-youtube-embed/blob/master/youtube-thumbnail-urls.md
|
||||
*
|
||||
* TODO: Do the sddefault->hqdefault fallback
|
||||
* - When doing this, apply referrerpolicy (https://github.com/ampproject/amphtml/pull/3940)
|
||||
* TODO: Consider using webp if supported, falling back to jpg
|
||||
*/
|
||||
if (!this.style.backgroundImage) {
|
||||
this.style.backgroundImage = `url("https://i.ytimg.com/vi/${this.videoId}/hqdefault.jpg")`;
|
||||
}
|
||||
|
||||
// Set up play button, and its visually hidden label
|
||||
if (!playBtnEl) {
|
||||
playBtnEl = document.createElement('button');
|
||||
playBtnEl.type = 'button';
|
||||
playBtnEl.classList.add('lty-playbtn');
|
||||
this.append(playBtnEl);
|
||||
}
|
||||
if (!playBtnEl.textContent) {
|
||||
const playBtnLabelEl = document.createElement('span');
|
||||
playBtnLabelEl.className = 'lyt-visually-hidden';
|
||||
playBtnLabelEl.textContent = this.playLabel;
|
||||
playBtnEl.append(playBtnLabelEl);
|
||||
}
|
||||
|
||||
// On hover (or tap), warm up the TCP connections we're (likely) about to use.
|
||||
this.addEventListener('pointerover', LiteYTEmbed.warmConnections, {once: true});
|
||||
|
||||
// Once the user clicks, add the real iframe and drop our play button
|
||||
// TODO: In the future we could be like amp-youtube and silently swap in the iframe during idle time
|
||||
// We'd want to only do this for in-viewport or near-viewport ones: https://github.com/ampproject/amphtml/pull/5003
|
||||
this.addEventListener('click', this.addIframe);
|
||||
}
|
||||
|
||||
// // TODO: Support the the user changing the [videoid] attribute
|
||||
// attributeChangedCallback() {
|
||||
// }
|
||||
|
||||
/**
|
||||
* Add a <link rel={preload | preconnect} ...> to the head
|
||||
*/
|
||||
static addPrefetch(kind, url, as) {
|
||||
const linkEl = document.createElement('link');
|
||||
linkEl.rel = kind;
|
||||
linkEl.href = url;
|
||||
if (as) {
|
||||
linkEl.as = as;
|
||||
}
|
||||
document.head.append(linkEl);
|
||||
}
|
||||
|
||||
/**
|
||||
* Begin pre-connecting to warm up the iframe load
|
||||
* Since the embed's network requests load within its iframe,
|
||||
* preload/prefetch'ing them outside the iframe will only cause double-downloads.
|
||||
* So, the best we can do is warm up a few connections to origins that are in the critical path.
|
||||
*
|
||||
* Maybe `<link rel=preload as=document>` would work, but it's unsupported: http://crbug.com/593267
|
||||
* But TBH, I don't think it'll happen soon with Site Isolation and split caches adding serious complexity.
|
||||
*/
|
||||
static warmConnections() {
|
||||
if (LiteYTEmbed.preconnected) return;
|
||||
|
||||
// The iframe document and most of its subresources come right off youtube.com
|
||||
LiteYTEmbed.addPrefetch('preconnect', 'https://www.youtube-nocookie.com');
|
||||
// The botguard script is fetched off from google.com
|
||||
LiteYTEmbed.addPrefetch('preconnect', 'https://www.google.com');
|
||||
LiteYTEmbed.preconnected = true;
|
||||
}
|
||||
|
||||
addIframe(e) {
|
||||
if (this.classList.contains('lyt-activated')) return;
|
||||
e.preventDefault();
|
||||
this.classList.add('lyt-activated');
|
||||
|
||||
const params = new URLSearchParams(this.getAttribute('params') || []);
|
||||
params.append('autoplay', '1');
|
||||
|
||||
const iframeEl = document.createElement('iframe');
|
||||
iframeEl.width = 560;
|
||||
iframeEl.height = 315;
|
||||
// No encoding necessary as [title] is safe. https://cheatsheetseries.owasp.org/cheatsheets/Cross_Site_Scripting_Prevention_Cheat_Sheet.html#:~:text=Safe%20HTML%20Attributes%20include
|
||||
iframeEl.title = this.playLabel;
|
||||
iframeEl.allow = 'accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture';
|
||||
iframeEl.allowFullscreen = true;
|
||||
// AFAIK, the encoding here isn't necessary for XSS, but we'll do it only because this is a URL
|
||||
// https://stackoverflow.com/q/64959723/89484
|
||||
iframeEl.src = `https://www.youtube-nocookie.com/embed/${encodeURIComponent(this.videoId)}?${params.toString()}`;
|
||||
this.append(iframeEl);
|
||||
|
||||
// Set focus for a11y
|
||||
iframeEl.focus();
|
||||
}
|
||||
}
|
||||
// Register custom element
|
||||
customElements.define('lite-youtube', LiteYTEmbed);
|
||||
Loading…
Reference in a new issue