51 lines
1.5 KiB
HTML
51 lines
1.5 KiB
HTML
<!-- 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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(function () {
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const origin = 'https://utteranc.es';
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const iframe = 'iframe.utterances-frame';
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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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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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addEventListener('message', (event) => {
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let theme;
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/* credit to <https://github.com/utterance/utterances/issues/170#issuecomment-594036347> */
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if (event.origin === origin) {
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/* page initial */
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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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/* global theme mode changed */
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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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}
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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.querySelector(iframe).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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