From 19a7be47f0986868a1927010e21496e721edaf94 Mon Sep 17 00:00:00 2001
From: Caleb Eby <caleb.eby01@gmail.com>
Date: Fri, 27 Aug 2021 10:14:56 -0700
Subject: [PATCH 1/2] Compress away all unused tokens in ESM bundle

---
 .changeset/tasty-bugs-talk.md      |  5 +++++
 gulpfile.js/tasks/build-scripts.js | 12 +++++++++++-
 2 files changed, 16 insertions(+), 1 deletion(-)
 create mode 100644 .changeset/tasty-bugs-talk.md

diff --git a/.changeset/tasty-bugs-talk.md b/.changeset/tasty-bugs-talk.md
new file mode 100644
index 000000000..39113c484
--- /dev/null
+++ b/.changeset/tasty-bugs-talk.md
@@ -0,0 +1,5 @@
+---
+'@cloudfour/patterns': minor
+---
+
+Compress away all unused tokens in ESM bundle
diff --git a/gulpfile.js/tasks/build-scripts.js b/gulpfile.js/tasks/build-scripts.js
index b3c450b40..26632fcc3 100644
--- a/gulpfile.js/tasks/build-scripts.js
+++ b/gulpfile.js/tasks/build-scripts.js
@@ -40,6 +40,12 @@ const createVirtualRootEntry = async () => {
     .join('\n');
 };
 
+/** @type {import('terser').MinifyOptions} */
+const terserESMOpts = {
+  compress: { passes: 6 },
+  mangle: false,
+};
+
 // The \0 is used to prevent the module name from being a real module name
 const virtualRootModule = '\0virtual-root-module';
 const virtualRootPlugin = () => ({
@@ -60,7 +66,11 @@ const buildJS = async () => {
     ],
   });
   await Promise.all([
-    bundle.write({ format: 'esm', file: path.join(outDir, `${pathName}.mjs`) }),
+    bundle.write({
+      format: 'esm',
+      file: path.join(outDir, `${pathName}.mjs`),
+      plugins: terser(terserESMOpts),
+    }),
     bundle.write({
       format: 'umd',
       name: globalName,

From 82152161f98b42cc4f8de1f32c87b25fcbf8ca84 Mon Sep 17 00:00:00 2001
From: Caleb Eby <caleb.eby01@gmail.com>
Date: Fri, 27 Aug 2021 10:32:30 -0700
Subject: [PATCH 2/2] Make the output a little more readable

---
 gulpfile.js/tasks/build-scripts.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gulpfile.js/tasks/build-scripts.js b/gulpfile.js/tasks/build-scripts.js
index 26632fcc3..b3f985a79 100644
--- a/gulpfile.js/tasks/build-scripts.js
+++ b/gulpfile.js/tasks/build-scripts.js
@@ -42,7 +42,8 @@ const createVirtualRootEntry = async () => {
 
 /** @type {import('terser').MinifyOptions} */
 const terserESMOpts = {
-  compress: { passes: 6 },
+  compress: { passes: 6, join_vars: false, sequences: false },
+  module: true,
   mangle: false,
 };