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perf: speed up page rendering and jekyll build process (#2034)
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- Ensure inline scripts execute after the DOM has fully loaded. - Use Rollup to bundle the theme-mode and Mermaid scripts, reducing the number of Jekyll include snippets.
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@@ -1,38 +1,25 @@
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<!-- The Disqus lazy loading. -->
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<div id="disqus_thread">
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<p class="text-center text-muted small">Comments powered by <a href="https://disqus.com/">Disqus</a>.</p>
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</div>
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<script type="text/javascript">
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<script>
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var disqus_config = function () {
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this.page.url = '{{ page.url | absolute_url }}';
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this.page.identifier = '{{ page.url }}';
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};
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{%- comment -%} Lazy loading {%- endcomment -%}
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var disqus_observer = new IntersectionObserver(
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function (entries) {
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if (entries[0].isIntersecting) {
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(function () {
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var d = document,
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s = d.createElement('script');
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s.src = 'https://{{ site.comments.disqus.shortname }}.disqus.com/embed.js';
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s.setAttribute('data-timestamp', +new Date());
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(d.head || d.body).appendChild(s);
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})();
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function addDisqus() {
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let disqusThread = document.createElement('div');
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let paragraph = document.createElement('p');
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disqus_observer.disconnect();
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}
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},
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{ threshold: [0] }
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);
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disqusThread.id = 'disqus_thread';
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paragraph.className = 'text-center text-muted small';
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paragraph.innerHTML = 'Comments powered by <a href="https://disqus.com/">Disqus</a>.';
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disqusThread.appendChild(paragraph);
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disqus_observer.observe(document.getElementById('disqus_thread'));
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const footer = document.querySelector('footer');
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footer.insertAdjacentElement("beforebegin", disqusThread);
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}
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{%- comment -%} Auto switch theme {%- endcomment -%}
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function reloadDisqus() {
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if (event.source === window && event.data && event.data.direction === ModeToggle.ID) {
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function reloadDisqus(event) {
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if (event.source === window && event.data && event.data.id === Theme.ID) {
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{%- comment -%} Disqus hasn't been loaded {%- endcomment -%}
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if (typeof DISQUS === 'undefined') {
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return;
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@@ -44,7 +31,27 @@
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}
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}
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if (document.getElementById('mode-toggle')) {
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window.addEventListener('message', reloadDisqus);
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addDisqus();
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if (Theme.switchable) {
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addEventListener('message', reloadDisqus);
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}
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{%- comment -%} Lazy loading {%- endcomment -%}
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var disqusObserver = new IntersectionObserver(
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function (entries) {
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if (entries[0].isIntersecting) {
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var d = document,
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s = d.createElement('script');
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s.src = 'https://{{ site.comments.disqus.shortname }}.disqus.com/embed.js';
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s.setAttribute('data-timestamp', +new Date());
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(d.head || d.body).appendChild(s);
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disqusObserver.disconnect();
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}
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},
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{ threshold: [0] }
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);
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disqusObserver.observe(document.getElementById('disqus_thread'));
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</script>
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