fix: utterances script to obey the follow_site_theme setting (#91)

* Fix js for correct theme load

* Use dataTheme directly instead ternary operator
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Nuri Jung 2022-07-15 00:39:28 +09:00 committed by GitHub
parent 26475d899b
commit 6d8d647ec5
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@ -1,46 +1,51 @@
<script async
crossorigin="anonymous"
issue-term="{{ site.utterances.issue_term }}"
label="{{ site.utterances.label }}"
{%- if site.utterances.follow_site_theme -%}
onload="initUtterancesTheme()"
{%- endif -%}
repo="{{ site.utterances.repo }}"
src="https://utteranc.es/client.js"
theme="{{ site.utterances.theme }}">
</script>
{%- if site.utterances.follow_site_theme -%} {%- if site.utterances.follow_site_theme -%}
<div id="utterances-placeholder"></div>
<script> <script>
const setUtterancesTheme = (dataTheme) => { const utterancesThemeFromDataTheme = () => {
const dataTheme = document.documentElement.getAttribute('data-theme');
return `github-${dataTheme}`;
};
const setUtterancesTheme = () => {
const iframe = document.querySelector('.utterances-frame'); const iframe = document.querySelector('.utterances-frame');
if (iframe) { if (iframe) {
const utterancesTheme = dataTheme === 'dark' ? 'github-dark' : 'github-light'
const message = { const message = {
type: 'set-theme', type: 'set-theme',
theme: utterancesTheme theme: utterancesThemeFromDataTheme()
}; };
iframe.contentWindow.postMessage(message, 'https://utteranc.es'); iframe.contentWindow.postMessage(message, 'https://utteranc.es');
} }
} }
// init theme
const initUtterancesTheme = () => {
const iframe = document.querySelector('.utterances-frame');
if (!iframe) return
iframe.onload = () => {
setUtterancesTheme(document.documentElement.getAttribute('data-theme'))
}
}
// dynamic change // dynamic change
const observer = new MutationObserver((mutationsList, observer) => { const observer = new MutationObserver((mutationsList, observer) => {
for (let mutation of mutationsList) { for (let mutation of mutationsList) {
if (mutation.type === 'attributes' && mutation.attributeName === 'data-theme') { if (mutation.type === 'attributes' && mutation.attributeName === 'data-theme') {
setUtterancesTheme(document.documentElement.getAttribute('data-theme')) setUtterancesTheme();
} }
} }
}); });
observer.observe(document.documentElement, { attributes: true, childList: false, subtree: false }); observer.observe(document.documentElement, { attributes: true, childList: false, subtree: false });
let utterancesScript = document.createElement('script');
utterancesScript.async = true;
utterancesScript.src = 'https://utteranc.es/client.js';
utterancesScript.crossOrigin = 'anonymous';
utterancesScript.setAttribute('issue-term', '{{ site.utterances.issue_term }}');
utterancesScript.setAttribute('label', '{{ site.utterances.label }}');
utterancesScript.setAttribute('repo', '{{ site.utterances.repo }}');
utterancesScript.setAttribute('theme', utterancesThemeFromDataTheme());
const placeholder = document.getElementById('utterances-placeholder');
placeholder.parentNode.replaceChild(utterancesScript, placeholder);
</script>
{%- else -%}
<script async
crossorigin="anonymous"
issue-term="{{ site.utterances.issue_term }}"
label="{{ site.utterances.label }}"
repo="{{ site.utterances.repo }}"
src="https://utteranc.es/client.js"
theme="{{ site.utterances.theme }}">
</script> </script>
{%- endif -%} {%- endif -%}