From cfeb6bc2df64257bb99da96cf85d91e9b368bca6 Mon Sep 17 00:00:00 2001
From: Trevor Burnham <trevorburnham@gmail.com>
Date: Tue, 2 Sep 2025 08:19:39 -0400
Subject: [PATCH] chore: Update tsconfig target to ES2021

All targeted browsers support ES2021 syntax. This change provides an
immediate bundle size reduction, with the potential for further gains if
code is rewritten to take advantage of optional chaining and nullish
coalescing.

* Optional chaining:
  https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Optional_chaining#browser_compatibility
* Nullish coalescing:
  https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Nullish_coalescing#browser_compatibility
---
 pages/tsconfig.json          |  4 ++--
 src/test-utils/tsconfig.json |  4 ++--
 tsconfig.json                | 10 ++--------
 tsconfig.unit.json           |  4 ++--
 4 files changed, 8 insertions(+), 14 deletions(-)

diff --git a/pages/tsconfig.json b/pages/tsconfig.json
index 5c14178b3d..f8a9b298a4 100644
--- a/pages/tsconfig.json
+++ b/pages/tsconfig.json
@@ -1,7 +1,7 @@
 {
   "compilerOptions": {
-    "lib": ["ES2020", "DOM"],
-    "target": "ES2015",
+    "lib": ["ES2021", "DOM"],
+    "target": "ES2021",
     "declaration": false,
     "declarationMap": false,
     "rootDir": ".",
diff --git a/src/test-utils/tsconfig.json b/src/test-utils/tsconfig.json
index 568a5797d3..3c7d6e0c4e 100644
--- a/src/test-utils/tsconfig.json
+++ b/src/test-utils/tsconfig.json
@@ -1,11 +1,11 @@
 {
   "compilerOptions": {
+    "lib": ["ES2021", "DOM"],
+    "target": "ES2021",
     "strict": true,
     "incremental": true,
     "types": [],
     "module": "CommonJS",
-    "target": "ES2015",
-    "lib": ["ES2020", "DOM"],
     "declaration": true,
     "allowSyntheticDefaultImports": true,
     "outDir": "../../lib/components/test-utils",
diff --git a/tsconfig.json b/tsconfig.json
index acc514fa68..dc120d7a8a 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,7 +1,7 @@
 {
   "compilerOptions": {
     "lib": ["ES2021", "DOM"],
-    "target": "ES2015",
+    "target": "ES2021",
     "types": [],
     "module": "ES2015",
     "moduleResolution": "node",
@@ -15,11 +15,5 @@
     "incremental": true
   },
   "include": ["src", "types"],
-  "exclude": [
-    "**/__tests__/**",
-    "src/test-utils/**",
-    "**/__integ__/**",
-    "**/__a11y__/**",
-    "**/__motion__/**"
-  ]
+  "exclude": ["**/__tests__/**", "src/test-utils/**", "**/__integ__/**", "**/__a11y__/**", "**/__motion__/**"]
 }
diff --git a/tsconfig.unit.json b/tsconfig.unit.json
index 8b2c7d5258..1b2e568fa8 100644
--- a/tsconfig.unit.json
+++ b/tsconfig.unit.json
@@ -1,7 +1,7 @@
 {
   "compilerOptions": {
-    "target": "es2018",
-    "lib": ["es2020", "dom"],
+    "lib": ["ES2021", "DOM"],
+    "target": "ES2021",
     "types": ["node", "jest", "@testing-library/jest-dom"],
     "moduleResolution": "node",
     "downlevelIteration": true,