feat(41249): allow import.meta with module: es2020 (microsoft#41274)

Author: a-tarasyuk

src/compiler/checker.ts

@@ -28654,8 +28654,8 @@ namespace ts {
         }
 
         function checkImportMetaProperty(node: MetaProperty) {
-            if (moduleKind !== ModuleKind.ESNext && moduleKind !== ModuleKind.System) {
-                error(node, Diagnostics.The_import_meta_meta_property_is_only_allowed_when_the_module_option_is_esnext_or_system);
+            if (moduleKind !== ModuleKind.ES2020 && moduleKind !== ModuleKind.ESNext && moduleKind !== ModuleKind.System) {
+                error(node, Diagnostics.The_import_meta_meta_property_is_only_allowed_when_the_module_option_is_es2020_esnext_or_system);
             }
             const file = getSourceFileOfNode(node);
             Debug.assert(!!(file.flags & NodeFlags.PossiblyContainsImportMeta), "Containing file is missing import meta node flag.");

src/compiler/diagnosticMessages.json

@@ -1004,7 +1004,7 @@
         "category": "Error",
         "code": 1342
     },
-    "The 'import.meta' meta-property is only allowed when the '--module' option is 'esnext' or 'system'.": {
+    "The 'import.meta' meta-property is only allowed when the '--module' option is 'es2020', 'esnext', or 'system'.": {
         "category": "Error",
         "code": 1343
     },

tests/baselines/reference/importMeta(module=commonjs,target=es5).errors.txt

@@ -1,26 +1,26 @@
 error TS2468: Cannot find global value 'Promise'.
-tests/cases/conformance/es2019/importMeta/assignmentTargets.ts(1,32): error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'esnext' or 'system'.
+tests/cases/conformance/es2019/importMeta/assignmentTargets.ts(1,32): error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'es2020', 'esnext', or 'system'.
 tests/cases/conformance/es2019/importMeta/assignmentTargets.ts(1,44): error TS2339: Property 'blah' does not exist on type 'ImportMeta'.
-tests/cases/conformance/es2019/importMeta/assignmentTargets.ts(1,51): error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'esnext' or 'system'.
+tests/cases/conformance/es2019/importMeta/assignmentTargets.ts(1,51): error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'es2020', 'esnext', or 'system'.
 tests/cases/conformance/es2019/importMeta/assignmentTargets.ts(1,63): error TS2339: Property 'blue' does not exist on type 'ImportMeta'.
-tests/cases/conformance/es2019/importMeta/assignmentTargets.ts(1,70): error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'esnext' or 'system'.
-tests/cases/conformance/es2019/importMeta/assignmentTargets.ts(2,1): error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'esnext' or 'system'.
+tests/cases/conformance/es2019/importMeta/assignmentTargets.ts(1,70): error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'es2020', 'esnext', or 'system'.
+tests/cases/conformance/es2019/importMeta/assignmentTargets.ts(2,1): error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'es2020', 'esnext', or 'system'.
 tests/cases/conformance/es2019/importMeta/assignmentTargets.ts(2,1): error TS2364: The left-hand side of an assignment expression must be a variable or a property access.
-tests/cases/conformance/es2019/importMeta/assignmentTargets.ts(11,21): error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'esnext' or 'system'.
+tests/cases/conformance/es2019/importMeta/assignmentTargets.ts(11,21): error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'es2020', 'esnext', or 'system'.
 tests/cases/conformance/es2019/importMeta/example.ts(2,2): error TS2705: An async function or method in ES5/ES3 requires the 'Promise' constructor.  Make sure you have a declaration for the 'Promise' constructor or include 'ES2015' in your `--lib` option.
-tests/cases/conformance/es2019/importMeta/example.ts(3,59): error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'esnext' or 'system'.
+tests/cases/conformance/es2019/importMeta/example.ts(3,59): error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'es2020', 'esnext', or 'system'.
 tests/cases/conformance/es2019/importMeta/example.ts(3,71): error TS2339: Property 'url' does not exist on type 'ImportMeta'.
-tests/cases/conformance/es2019/importMeta/example.ts(6,16): error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'esnext' or 'system'.
+tests/cases/conformance/es2019/importMeta/example.ts(6,16): error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'es2020', 'esnext', or 'system'.
 tests/cases/conformance/es2019/importMeta/example.ts(6,28): error TS2339: Property 'scriptElement' does not exist on type 'ImportMeta'.
-tests/cases/conformance/es2019/importMeta/moduleLookingFile01.ts(1,16): error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'esnext' or 'system'.
-tests/cases/conformance/es2019/importMeta/moduleLookingFile01.ts(2,16): error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'esnext' or 'system'.
+tests/cases/conformance/es2019/importMeta/moduleLookingFile01.ts(1,16): error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'es2020', 'esnext', or 'system'.
+tests/cases/conformance/es2019/importMeta/moduleLookingFile01.ts(2,16): error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'es2020', 'esnext', or 'system'.
 tests/cases/conformance/es2019/importMeta/moduleLookingFile01.ts(2,23): error TS17012: 'metal' is not a valid meta-property for keyword 'import'. Did you mean 'meta'?
-tests/cases/conformance/es2019/importMeta/moduleLookingFile01.ts(3,16): error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'esnext' or 'system'.
+tests/cases/conformance/es2019/importMeta/moduleLookingFile01.ts(3,16): error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'es2020', 'esnext', or 'system'.
 tests/cases/conformance/es2019/importMeta/moduleLookingFile01.ts(3,23): error TS17012: 'import' is not a valid meta-property for keyword 'import'. Did you mean 'meta'?
-tests/cases/conformance/es2019/importMeta/scriptLookingFile01.ts(1,15): error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'esnext' or 'system'.
-tests/cases/conformance/es2019/importMeta/scriptLookingFile01.ts(2,15): error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'esnext' or 'system'.
+tests/cases/conformance/es2019/importMeta/scriptLookingFile01.ts(1,15): error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'es2020', 'esnext', or 'system'.
+tests/cases/conformance/es2019/importMeta/scriptLookingFile01.ts(2,15): error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'es2020', 'esnext', or 'system'.
 tests/cases/conformance/es2019/importMeta/scriptLookingFile01.ts(2,22): error TS17012: 'metal' is not a valid meta-property for keyword 'import'. Did you mean 'meta'?
-tests/cases/conformance/es2019/importMeta/scriptLookingFile01.ts(3,15): error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'esnext' or 'system'.
+tests/cases/conformance/es2019/importMeta/scriptLookingFile01.ts(3,15): error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'es2020', 'esnext', or 'system'.
 tests/cases/conformance/es2019/importMeta/scriptLookingFile01.ts(3,22): error TS17012: 'import' is not a valid meta-property for keyword 'import'. Did you mean 'meta'?
 
 
@@ -32,14 +32,14 @@ tests/cases/conformance/es2019/importMeta/scriptLookingFile01.ts(3,22): error TS
 !!! error TS2705: An async function or method in ES5/ES3 requires the 'Promise' constructor.  Make sure you have a declaration for the 'Promise' constructor or include 'ES2015' in your `--lib` option.
       const response = await fetch(new URL("../hamsters.jpg", import.meta.url).toString());
                                                               ~~~~~~~~~~~
-!!! error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'esnext' or 'system'.
+!!! error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'es2020', 'esnext', or 'system'.
                                                                           ~~~
 !!! error TS2339: Property 'url' does not exist on type 'ImportMeta'.
       const blob = await response.blob();
 
       const size = import.meta.scriptElement.dataset.size || 300;
                    ~~~~~~~~~~~
-!!! error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'esnext' or 'system'.
+!!! error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'es2020', 'esnext', or 'system'.
                                ~~~~~~~~~~~~~
 !!! error TS2339: Property 'scriptElement' does not exist on type 'ImportMeta'.
 
@@ -53,48 +53,48 @@ tests/cases/conformance/es2019/importMeta/scriptLookingFile01.ts(3,22): error TS
 ==== tests/cases/conformance/es2019/importMeta/moduleLookingFile01.ts (5 errors) ====
     export let x = import.meta;
                    ~~~~~~~~~~~
-!!! error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'esnext' or 'system'.
+!!! error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'es2020', 'esnext', or 'system'.
     export let y = import.metal;
                    ~~~~~~~~~~~~
-!!! error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'esnext' or 'system'.
+!!! error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'es2020', 'esnext', or 'system'.
                           ~~~~~
 !!! error TS17012: 'metal' is not a valid meta-property for keyword 'import'. Did you mean 'meta'?
     export let z = import.import.import.malkovich;
                    ~~~~~~~~~~~~~
-!!! error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'esnext' or 'system'.
+!!! error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'es2020', 'esnext', or 'system'.
                           ~~~~~~
 !!! error TS17012: 'import' is not a valid meta-property for keyword 'import'. Did you mean 'meta'?
 
 ==== tests/cases/conformance/es2019/importMeta/scriptLookingFile01.ts (5 errors) ====
     let globalA = import.meta;
                   ~~~~~~~~~~~
-!!! error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'esnext' or 'system'.
+!!! error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'es2020', 'esnext', or 'system'.
     let globalB = import.metal;
                   ~~~~~~~~~~~~
-!!! error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'esnext' or 'system'.
+!!! error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'es2020', 'esnext', or 'system'.
                          ~~~~~
 !!! error TS17012: 'metal' is not a valid meta-property for keyword 'import'. Did you mean 'meta'?
     let globalC = import.import.import.malkovich;
                   ~~~~~~~~~~~~~
-!!! error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'esnext' or 'system'.
+!!! error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'es2020', 'esnext', or 'system'.
                          ~~~~~~
 !!! error TS17012: 'import' is not a valid meta-property for keyword 'import'. Did you mean 'meta'?
 
 ==== tests/cases/conformance/es2019/importMeta/assignmentTargets.ts (8 errors) ====
     export const foo: ImportMeta = import.meta.blah = import.meta.blue = import.meta;
                                    ~~~~~~~~~~~
-!!! error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'esnext' or 'system'.
+!!! error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'es2020', 'esnext', or 'system'.
                                                ~~~~
 !!! error TS2339: Property 'blah' does not exist on type 'ImportMeta'.
                                                       ~~~~~~~~~~~
-!!! error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'esnext' or 'system'.
+!!! error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'es2020', 'esnext', or 'system'.
                                                                   ~~~~
 !!! error TS2339: Property 'blue' does not exist on type 'ImportMeta'.
                                                                          ~~~~~~~~~~~
-!!! error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'esnext' or 'system'.
+!!! error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'es2020', 'esnext', or 'system'.
     import.meta = foo;
     ~~~~~~~~~~~
-!!! error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'esnext' or 'system'.
+!!! error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'es2020', 'esnext', or 'system'.
     ~~~~~~~~~~~
 !!! error TS2364: The left-hand side of an assignment expression must be a variable or a property access.
 
@@ -107,4 +107,4 @@ tests/cases/conformance/es2019/importMeta/scriptLookingFile01.ts(3,22): error TS
 
     const { a, b, c } = import.meta.wellKnownProperty;
                         ~~~~~~~~~~~
-!!! error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'esnext' or 'system'.
+!!! error TS1343: The 'import.meta' meta-property is only allowed when the '--module' option is 'es2020', 'esnext', or 'system'.