From ba73e0d97a89df79726303f5a0c8a96abd2e6229 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?K=C3=A9vin=20Commaille?=
 <76261501+zecakeh@users.noreply.github.com>
Date: Tue, 14 Jan 2025 19:34:50 +0100
Subject: [PATCH] Fix syntax highlighting and click-to-copy buttons for code
 blocks (#2049)

---
 .../internal/newsfragments/2049.clarification |  1 +
 postcss.config.js                             | 22 ++++++++++++++-----
 2 files changed, 17 insertions(+), 6 deletions(-)
 create mode 100644 changelogs/internal/newsfragments/2049.clarification

diff --git a/changelogs/internal/newsfragments/2049.clarification b/changelogs/internal/newsfragments/2049.clarification
new file mode 100644
index 00000000..5a6e90f1
--- /dev/null
+++ b/changelogs/internal/newsfragments/2049.clarification
@@ -0,0 +1 @@
+Fix syntax highlighting and click-to-copy buttons for code blocks by purging less CSS.
diff --git a/postcss.config.js b/postcss.config.js
index ecd78497..50e7224f 100644
--- a/postcss.config.js
+++ b/postcss.config.js
@@ -1,11 +1,21 @@
 // Remove unused CSS selectors.
 const purgecss = require('@fullhuman/postcss-purgecss')({
-    // Use stats generated by Hugo.
-    content: [ './hugo_stats.json' ],
-    defaultExtractor: (content) => {
-        let els = JSON.parse(content).htmlElements;
-        return els.tags.concat(els.classes, els.ids);
-    }
+    content: [
+        // Use stats generated by Hugo from HTML content.
+        './hugo_stats.json',
+        // Add used JS scripts.
+        process.env.HUGO_PUBLISHDIR + '/js/click-to-copy.min.*.js',
+        process.env.HUGO_PUBLISHDIR + '/js/main.min.*.js',
+    ],
+    extractors: [
+        {
+            extractor: (content) => {
+                let els = JSON.parse(content).htmlElements;
+                return els.tags.concat(els.classes, els.ids);
+            },
+            extensions: ["json"],
+        },
+    ],
 });
 
 module.exports = {