From 46ea59631d3d5025382e03b221b3739eaa84602b Mon Sep 17 00:00:00 2001
From: Evan Wallace <evan.exe@gmail.com>
Date: Sun, 12 May 2024 12:36:33 -0400
Subject: [PATCH] fix #3762: add `es2023` as an alias for `es2022`

---
 CHANGELOG.md                       | 6 ++++++
 internal/resolver/tsconfig_json.go | 2 +-
 pkg/api/api.go                     | 1 +
 pkg/api/api_impl.go                | 2 ++
 pkg/cli/cli_impl.go                | 1 +
 5 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index e6518254033..0e1064a9f4f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## Unreleased
+
+* Allow `es2023` as a target environment ([#3762](https://github.com/evanw/esbuild/issues/3762))
+
+    TypeScript recently [added `es2023`](https://github.com/microsoft/TypeScript/pull/58140) as a compilation target, so esbuild now supports this too. There is no difference between a target of `es2022` and `es2023` as far as esbuild is concerned since the 2023 edition of JavaScript doesn't introduce any new syntax features.
+
 ## 0.21.1
 
 * Fix a regression with `--keep-names` ([#3756](https://github.com/evanw/esbuild/issues/3756))
diff --git a/internal/resolver/tsconfig_json.go b/internal/resolver/tsconfig_json.go
index 1cc48941859..ffeb75dbb93 100644
--- a/internal/resolver/tsconfig_json.go
+++ b/internal/resolver/tsconfig_json.go
@@ -213,7 +213,7 @@ func ParseTSConfigJSON(
 				switch lowerValue {
 				case "es3", "es5", "es6", "es2015", "es2016", "es2017", "es2018", "es2019", "es2020", "es2021":
 					result.Settings.Target = config.TSTargetBelowES2022
-				case "es2022", "esnext":
+				case "es2022", "es2023", "esnext":
 					result.Settings.Target = config.TSTargetAtOrAboveES2022
 				default:
 					ok = false
diff --git a/pkg/api/api.go b/pkg/api/api.go
index 9981953346f..017ed8905c6 100644
--- a/pkg/api/api.go
+++ b/pkg/api/api.go
@@ -132,6 +132,7 @@ const (
 	ES2020
 	ES2021
 	ES2022
+	ES2023
 )
 
 type Loader uint16
diff --git a/pkg/api/api_impl.go b/pkg/api/api_impl.go
index 98a29c58055..18efb58d3b3 100644
--- a/pkg/api/api_impl.go
+++ b/pkg/api/api_impl.go
@@ -305,6 +305,8 @@ func validateFeatures(log logger.Log, target Target, engines []Engine) (compat.J
 		constraints[compat.ES] = compat.Semver{Parts: []int{2021}}
 	case ES2022:
 		constraints[compat.ES] = compat.Semver{Parts: []int{2022}}
+	case ES2023:
+		constraints[compat.ES] = compat.Semver{Parts: []int{2023}}
 	case ESNext, DefaultTarget:
 	default:
 		panic("Invalid target")
diff --git a/pkg/cli/cli_impl.go b/pkg/cli/cli_impl.go
index 8e292cc315b..396023ebf7d 100644
--- a/pkg/cli/cli_impl.go
+++ b/pkg/cli/cli_impl.go
@@ -980,6 +980,7 @@ func parseTargets(targets []string, arg string) (target api.Target, engines []ap
 		"es2020": api.ES2020,
 		"es2021": api.ES2021,
 		"es2022": api.ES2022,
+		"es2023": api.ES2023,
 	}
 
 outer: