oh no where did astro go

docs/_utils/highlight-code.js

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+/* eslint sort-imports-es6-autofix/sort-imports-es6: 0 */
+import { parse } from 'node-html-parser';
+import Prism from 'prismjs';
+import 'prismjs/plugins/custom-class/prism-custom-class.js';
+import PrismLoader from 'prismjs/components/index.js';
+
+PrismLoader('diff');
+PrismLoader.silent = true;
+Prism.plugins.customClass.prefix('code-');
+
+/**
+ * Highlights a string of code using the specified language.
+ *
+ * @param {string} code - The code to highlight.
+ * @param {string} language - The language the code is written in. For available languages, refer to this page:
+ *   https://prismjs.com/#supported-languages
+ */
+export function highlightCode(code, language = 'plain') {
+  const alias = language.replace(/^diff-/, '');
+  const isDiff = /^diff-/i.test(language);
+
+  if (!Prism.languages[alias]) {
+    PrismLoader(alias);
+    if (!Prism.languages[alias]) {
+      throw new Error(`Unsupported language for code highlighting: "${language}"`);
+    }
+  }
+
+  if (isDiff) {
+    Prism.languages[language] = Prism.languages.diff;
+  }
+
+  return Prism.highlight(code, Prism.languages[language], language);
+}
+
+/**
+ * Eleventy plugin to highlight code blocks with the `language-*` attribute using Prism.js. Unlike most plugins, this
+ * works on the entire document — not just markdown content.
+ */
+export function highlightCodePlugin(options = {}) {
+  options = {
+    container: 'body',
+    ...options
+  };
+
+  return function (eleventyConfig) {
+    eleventyConfig.addTransform('highlight-code', content => {
+      const doc = parse(content, { blockTextElements: { code: true } });
+      const container = doc.querySelector(options.container);
+
+      if (!container) {
+        return content;
+      }
+
+      // Look for <code class="language-*"> and highlight each one
+      container.querySelectorAll('code[class*="language-"]').forEach(code => {
+        const langClass = [...code.classList.values()].find(val => val.startsWith('language-'));
+        const lang = langClass ? langClass.replace(/^language-/, '') : 'plain';
+
+        try {
+          code.innerHTML = highlightCode(code.textContent ?? '', lang);
+        } catch (err) {
+          if (!options.ignoreMissingLangs) {
+            throw new Error(err.message);
+          }
+        }
+      });
+
+      return doc.toString();
+    });
+  };
+}