From 776996501cfed2b94cc5ab9594ce1be59b0701a4 Mon Sep 17 00:00:00 2001
From: Marco Tranchino <marco.tranchino@digital.cabinet-office.gov.uk>
Date: Tue, 17 Sep 2024 11:45:43 +0100
Subject: [PATCH] Use `terser` for Javascript minification

This is needed because of the need to create two different JS rollups and
because the default compressor fails. See link below.

https://github.com/alphagov/tech-docs-gem/issues/352#issuecomment-2352404262
---
 Gemfile                | 2 ++
 example/Gemfile        | 2 ++
 lib/govuk_tech_docs.rb | 1 +
 3 files changed, 5 insertions(+)

diff --git a/Gemfile b/Gemfile
index e3c78d49..8cbb8467 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,3 +2,5 @@ source "https://rubygems.org"
 
 # Specify your gem's dependencies in govuk_tech_docs.gemspec
 gemspec
+
+gem "terser"
\ No newline at end of file
diff --git a/example/Gemfile b/example/Gemfile
index 0d4908e1..d4b4869f 100644
--- a/example/Gemfile
+++ b/example/Gemfile
@@ -1,3 +1,5 @@
 source "https://rubygems.org"
 
 gem "govuk_tech_docs", path: ".."
+
+gem "terser"
diff --git a/lib/govuk_tech_docs.rb b/lib/govuk_tech_docs.rb
index cf5733ac..8f066cae 100644
--- a/lib/govuk_tech_docs.rb
+++ b/lib/govuk_tech_docs.rb
@@ -57,6 +57,7 @@ def self.configure(context, options = {})
 
     context.configure :build do
       activate :autoprefixer
+      activate :minify_javascript, compressor: Terser.new
       # activate :minify_javascript, ignore: ["/raw_assets/*"]
     end