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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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@@ -1,49 +1,38 @@
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<!-- https://utteranc.es/ -->
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<script
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src="https://utteranc.es/client.js"
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repo="{{ site.comments.utterances.repo }}"
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issue-term="{{ site.comments.utterances.issue_term }}"
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crossorigin="anonymous"
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async
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></script>
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<script type="text/javascript">
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<script>
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(function () {
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const origin = 'https://utteranc.es';
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const lightTheme = 'github-light';
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const darkTheme = 'github-dark';
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let initTheme = lightTheme;
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const html = document.documentElement;
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const themeMapper = Theme.getThemeMapper('github-light', 'github-dark');
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const initTheme = themeMapper[Theme.visualState];
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if (
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(html.hasAttribute('data-mode') && html.getAttribute('data-mode') === 'dark') ||
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(!html.hasAttribute('data-mode') && window.matchMedia('(prefers-color-scheme: dark)').matches)
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) {
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initTheme = darkTheme;
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}
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let script = document.createElement('script');
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script.src = 'https://utteranc.es/client.js';
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script.setAttribute('repo', '{{ site.comments.utterances.repo }}');
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script.setAttribute('issue-term', '{{ site.comments.utterances.issue_term }}');
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script.setAttribute('theme', initTheme);
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script.crossOrigin = 'anonymous';
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script.async = true;
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const $footer = document.querySelector('footer');
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$footer.insertAdjacentElement('beforebegin', script);
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addEventListener('message', (event) => {
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let theme;
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let newTheme;
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{%- comment -%} credit to <https://github.com/utterance/utterances/issues/170#issuecomment-594036347> {%- endcomment -%}
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if (event.origin === origin) {
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{%- comment -%} page initial {%- endcomment -%}
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theme = initTheme;
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} else if (event.source === window && event.data && event.data.direction === ModeToggle.ID) {
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{%- comment -%} global theme mode changed {%- endcomment -%}
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const mode = event.data.message;
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theme = mode === ModeToggle.DARK_MODE ? darkTheme : lightTheme;
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} else {
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return;
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{%- comment -%}
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Credit to <https://github.com/utterance/utterances/issues/170#issuecomment-594036347>
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{%- endcomment -%}
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if (event.source === window && event.data && event.data.id === Theme.ID) {
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newTheme = themeMapper[Theme.visualState];
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const message = {
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type: 'set-theme',
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theme: newTheme
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};
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const utterances = document.querySelector('.utterances-frame').contentWindow;
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utterances.postMessage(message, origin);
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}
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const message = {
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type: 'set-theme',
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theme: theme
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};
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const utterances = document.getElementsByClassName('utterances-frame')[0].contentWindow;
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utterances.postMessage(message, origin);
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});
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})();
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</script>
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