deploy: ebd4cc0010
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61
node_modules/vitepress/dist/client/app/composables/head.js
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61
node_modules/vitepress/dist/client/app/composables/head.js
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import { watchEffect } from 'vue';
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import { createTitle, mergeHead } from '../../shared';
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export function useUpdateHead(route, siteDataByRouteRef) {
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let managedHeadTags = [];
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let isFirstUpdate = true;
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const updateHeadTags = (newTags) => {
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if (import.meta.env.PROD && isFirstUpdate) {
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// in production, the initial meta tags are already pre-rendered so we
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// skip the first update.
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isFirstUpdate = false;
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return;
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}
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managedHeadTags.forEach((el) => document.head.removeChild(el));
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managedHeadTags = [];
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newTags.forEach((headConfig) => {
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const el = createHeadElement(headConfig);
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document.head.appendChild(el);
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managedHeadTags.push(el);
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});
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};
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watchEffect(() => {
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const pageData = route.data;
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const siteData = siteDataByRouteRef.value;
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const pageDescription = pageData && pageData.description;
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const frontmatterHead = (pageData && pageData.frontmatter.head) || [];
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// update title and description
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document.title = createTitle(siteData, pageData);
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const description = pageDescription || siteData.description;
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let metaDescriptionElement = document.querySelector(`meta[name=description]`);
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if (metaDescriptionElement) {
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metaDescriptionElement.setAttribute('content', description);
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}
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else {
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createHeadElement(['meta', { name: 'description', content: description }]);
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}
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updateHeadTags(mergeHead(siteData.head, filterOutHeadDescription(frontmatterHead)));
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});
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}
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function createHeadElement([tag, attrs, innerHTML]) {
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const el = document.createElement(tag);
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for (const key in attrs) {
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el.setAttribute(key, attrs[key]);
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}
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if (innerHTML) {
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el.innerHTML = innerHTML;
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}
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if (tag === 'script' && !attrs.async) {
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// async is true by default for dynamically created scripts
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;
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el.async = false;
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}
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return el;
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}
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function isMetaDescription(headConfig) {
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return (headConfig[0] === 'meta' &&
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headConfig[1] &&
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headConfig[1].name === 'description');
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}
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function filterOutHeadDescription(head) {
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return head.filter((h) => !isMetaDescription(h));
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}
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