84 lines
2.7 KiB
JavaScript
84 lines
2.7 KiB
JavaScript
// https://vitepress.dev/guide/custom-theme
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import { h } from 'vue'
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import DefaultTheme from 'vitepress/theme'
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import './style.css'
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/** @type {import('vitepress').Theme} */
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export default {
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extends: DefaultTheme,
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Layout: () => {
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return h(DefaultTheme.Layout, null, {
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// Use default VitePress layout slots
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})
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},
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enhanceApp({ app, router, siteData }) {
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// Performance optimization: Add image loading attributes
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if (typeof window !== 'undefined') {
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let observer = null;
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const setupImageOptimization = () => {
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// Clean up existing observer
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if (observer) {
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observer.disconnect();
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}
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// Add loading="lazy" to images after mount
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observer = new MutationObserver((mutations) => {
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mutations.forEach((mutation) => {
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mutation.addedNodes.forEach((node) => {
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if (node.nodeType === 1) { // Element node
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// Add loading attributes to shields.io images
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const images = node.querySelectorAll?.('img[src*="img.shields.io"], img[src*="shields.io"]') || [];
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images.forEach(img => {
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if (!img.hasAttribute('loading')) {
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img.setAttribute('loading', 'eager'); // Keep badges as eager loading
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img.setAttribute('decoding', 'async');
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}
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});
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// Add loading attributes to other images
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const otherImages = node.querySelectorAll?.('img:not([src*="shields.io"])') || [];
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otherImages.forEach(img => {
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if (!img.hasAttribute('loading')) {
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img.setAttribute('loading', 'lazy');
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img.setAttribute('decoding', 'async');
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}
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});
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}
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});
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});
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});
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if (document.body) {
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observer.observe(document.body, {
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childList: true,
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subtree: true
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});
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}
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};
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// Setup on initial load
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if (document.readyState === 'loading') {
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document.addEventListener('DOMContentLoaded', setupImageOptimization);
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} else {
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setupImageOptimization();
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}
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// Clean up observer on route change and setup again
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router.onAfterRouteChanged = () => {
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if (observer) {
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observer.disconnect();
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}
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// Small delay to allow new content to render
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setTimeout(setupImageOptimization, 100);
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};
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// Clean up on beforeunload
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window.addEventListener('beforeunload', () => {
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if (observer) {
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observer.disconnect();
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}
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});
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}
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}
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}
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