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evanwevanw
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add an "es2022" target (#2012)
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‎CHANGELOG.md

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@@ -2,6 +2,18 @@
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## Unreleased
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* Allow `es2022` as a target environment ([#2012](https://github.com/evanw/esbuild/issues/2012))
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TypeScript recently [added support for `es2022`](https://devblogs.microsoft.com/typescript/announcing-typescript-4-6/#target-es2022) as a compilation target so esbuild now supports this too. Support for this is preliminary as there is no published ES2022 specification yet (i.e. https://tc39.es/ecma262/2021/ exists but https://tc39.es/ecma262/2022/ is a 404 error). The meaning of esbuild's `es2022` target may change in the future when the specification is finalized. Right now I have made the `es2022` target enable support for the syntax-related [finished proposals](https://github.com/tc39/proposals/blob/main/finished-proposals.md) that are marked as `2022`:
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* Class fields
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* Class private members
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* Class static blocks
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* Ergonomic class private member checks
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* Top-level await
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I have also included the "arbitrary module namespace names" feature since I'm guessing it will end up in the ES2022 specification (this syntax feature was added to the specification without a proposal). TypeScript has [not added support for this yet](https://github.com/microsoft/TypeScript/issues/40594).
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* Match `define` to strings in index expressions ([#2050](https://github.com/evanw/esbuild/issues/2050))
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With this release, configuring `--define:foo.bar=baz` now matches and replaces both `foo.bar` and `foo['bar']` expressions in the original source code. This is necessary for people who have enabled TypeScript's [`noPropertyAccessFromIndexSignature` feature](https://www.typescriptlang.org/tsconfig#noPropertyAccessFromIndexSignature), which prevents you from using normal property access syntax on a type with an index signature such as in the following code:

‎internal/compat/js_table.go

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@@ -98,6 +98,7 @@ func (features JSFeature) Has(feature JSFeature) bool {
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var jsTable = map[JSFeature]map[Engine][]versionRange{
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ArbitraryModuleNamespaceNames: {
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Chrome: {{start: v{90, 0, 0}}},
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ES: {{start: v{2022, 0, 0}}},
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Firefox: {{start: v{87, 0, 0}}},
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Node: {{start: v{16, 0, 0}}},
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},
@@ -164,6 +165,7 @@ var jsTable = map[JSFeature]map[Engine][]versionRange{
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ClassField: {
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Chrome: {{start: v{73, 0, 0}}},
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Edge: {{start: v{79, 0, 0}}},
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ES: {{start: v{2022, 0, 0}}},
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Firefox: {{start: v{69, 0, 0}}},
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IOS: {{start: v{14, 0, 0}}},
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Node: {{start: v{12, 0, 0}}},
@@ -173,6 +175,7 @@ var jsTable = map[JSFeature]map[Engine][]versionRange{
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ClassPrivateAccessor: {
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Chrome: {{start: v{84, 0, 0}}},
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Edge: {{start: v{84, 0, 0}}},
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ES: {{start: v{2022, 0, 0}}},
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Firefox: {{start: v{90, 0, 0}}},
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IOS: {{start: v{15, 0, 0}}},
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Node: {{start: v{14, 6, 0}}},
@@ -182,6 +185,7 @@ var jsTable = map[JSFeature]map[Engine][]versionRange{
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ClassPrivateBrandCheck: {
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Chrome: {{start: v{91, 0, 0}}},
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Edge: {{start: v{91, 0, 0}}},
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ES: {{start: v{2022, 0, 0}}},
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Firefox: {{start: v{90, 0, 0}}},
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IOS: {{start: v{15, 0, 0}}},
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Node: {{start: v{16, 9, 0}}},
@@ -191,6 +195,7 @@ var jsTable = map[JSFeature]map[Engine][]versionRange{
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ClassPrivateField: {
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Chrome: {{start: v{84, 0, 0}}},
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Edge: {{start: v{84, 0, 0}}},
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ES: {{start: v{2022, 0, 0}}},
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Firefox: {{start: v{90, 0, 0}}},
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IOS: {{start: v{15, 0, 0}}},
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Node: {{start: v{14, 6, 0}}},
@@ -200,6 +205,7 @@ var jsTable = map[JSFeature]map[Engine][]versionRange{
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ClassPrivateMethod: {
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Chrome: {{start: v{84, 0, 0}}},
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Edge: {{start: v{84, 0, 0}}},
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ES: {{start: v{2022, 0, 0}}},
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Firefox: {{start: v{90, 0, 0}}},
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IOS: {{start: v{15, 0, 0}}},
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Node: {{start: v{14, 6, 0}}},
@@ -209,6 +215,7 @@ var jsTable = map[JSFeature]map[Engine][]versionRange{
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ClassPrivateStaticAccessor: {
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Chrome: {{start: v{84, 0, 0}}},
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Edge: {{start: v{84, 0, 0}}},
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ES: {{start: v{2022, 0, 0}}},
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Firefox: {{start: v{90, 0, 0}}},
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IOS: {{start: v{15, 0, 0}}},
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Node: {{start: v{14, 6, 0}}},
@@ -218,6 +225,7 @@ var jsTable = map[JSFeature]map[Engine][]versionRange{
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ClassPrivateStaticField: {
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Chrome: {{start: v{74, 0, 0}}},
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Edge: {{start: v{79, 0, 0}}},
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ES: {{start: v{2022, 0, 0}}},
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Firefox: {{start: v{90, 0, 0}}},
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IOS: {{start: v{15, 0, 0}}},
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Node: {{start: v{12, 0, 0}}},
@@ -227,6 +235,7 @@ var jsTable = map[JSFeature]map[Engine][]versionRange{
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ClassPrivateStaticMethod: {
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Chrome: {{start: v{84, 0, 0}}},
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Edge: {{start: v{84, 0, 0}}},
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ES: {{start: v{2022, 0, 0}}},
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Firefox: {{start: v{90, 0, 0}}},
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IOS: {{start: v{15, 0, 0}}},
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Node: {{start: v{14, 6, 0}}},
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},
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ClassStaticBlocks: {
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Chrome: {{start: v{91, 0, 0}}},
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ES: {{start: v{2022, 0, 0}}},
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Node: {{start: v{16, 11, 0}}},
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},
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ClassStaticField: {
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Chrome: {{start: v{73, 0, 0}}},
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Edge: {{start: v{79, 0, 0}}},
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ES: {{start: v{2022, 0, 0}}},
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Firefox: {{start: v{75, 0, 0}}},
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IOS: {{start: v{15, 0, 0}}},
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Node: {{start: v{12, 0, 0}}},
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TopLevelAwait: {
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Chrome: {{start: v{89, 0, 0}}},
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Edge: {{start: v{89, 0, 0}}},
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ES: {{start: v{2022, 0, 0}}},
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Firefox: {{start: v{89, 0, 0}}},
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Node: {{start: v{14, 8, 0}}},
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Safari: {{start: v{15, 0, 0}}},

‎internal/resolver/tsconfig_json.go

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constraints[compat.ES] = []int{2020}
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case "es2021":
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constraints[compat.ES] = []int{2021}
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case "es2022":
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constraints[compat.ES] = []int{2022}
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case "esnext":
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// Nothing to do in this case
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default:

‎pkg/api/api.go

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@@ -125,6 +125,7 @@ const (
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ES2019
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ES2020
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ES2021
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ES2022
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)
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type Loader uint8

‎pkg/api/api_impl.go

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constraints[compat.ES] = []int{2020}
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case ES2021:
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constraints[compat.ES] = []int{2021}
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case ES2022:
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constraints[compat.ES] = []int{2022}
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case ESNext:
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targetFromAPI = config.TargetWasConfiguredIncludingESNext
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case DefaultTarget:

‎pkg/cli/cli_impl.go

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"es2019": api.ES2019,
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"es2020": api.ES2020,
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"es2021": api.ES2021,
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"es2022": api.ES2022,
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}
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validEngines := map[string]api.EngineName{

‎scripts/compat-table.js

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@@ -157,10 +157,19 @@ mergeVersions('NullishCoalescing', { es2020: true })
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mergeVersions('OptionalChain', { es2020: true })
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mergeVersions('TypeofExoticObjectIsObject', { es2020: true }) // https://github.com/tc39/ecma262/pull/1441
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mergeVersions('LogicalAssignment', { es2021: true })
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mergeVersions('TopLevelAwait', {})
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mergeVersions('ArbitraryModuleNamespaceNames', {})
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mergeVersions('ClassField', { es2022: true })
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mergeVersions('ClassPrivateAccessor', { es2022: true })
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mergeVersions('ClassPrivateBrandCheck', { es2022: true })
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mergeVersions('ClassPrivateField', { es2022: true })
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mergeVersions('ClassPrivateMethod', { es2022: true })
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mergeVersions('ClassPrivateStaticAccessor', { es2022: true })
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mergeVersions('ClassPrivateStaticField', { es2022: true })
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mergeVersions('ClassPrivateStaticMethod', { es2022: true })
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mergeVersions('ClassStaticBlocks', { es2022: true })
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mergeVersions('ClassStaticField', { es2022: true })
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mergeVersions('TopLevelAwait', { es2022: true })
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mergeVersions('ArbitraryModuleNamespaceNames', { es2022: true })
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mergeVersions('ImportAssertions', {})
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mergeVersions('ClassStaticBlocks', {})
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// Manually copied from https://caniuse.com/?search=export%20*%20as
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mergeVersions('ExportStarAs', {

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