fix #3762: add es2023 as an alias for es2022

Author: evanw

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))

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

pkg/api/api.go

@@ -132,6 +132,7 @@ const (
 ES2020
 ES2021
 ES2022
+ES2023
 )
 
 type Loader uint16

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")

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: