fixup! module: unflag esm json modules

lib/internal/modules/esm/translators.js

@@ -259,6 +259,7 @@ translators.set('builtin', async function builtinStrategy(url) {
 
 // Strategy for loading a JSON file
 translators.set('json', async function jsonStrategy(url, source) {
+  emitExperimentalWarning('Importing JSON modules');
   assertBufferSource(source, true, 'load');
   debug(`Loading JSONModule ${url}`);
   const pathname = StringPrototypeStartsWith(url, 'file:') ?

test/es-module/test-esm-json.mjs

@@ -1,6 +1,28 @@
 import '../common/index.mjs';
-import { strictEqual } from 'assert';
+import { path } from '../common/fixtures.mjs';
+import { strictEqual, ok } from 'assert';
+import { spawn } from 'child_process';
 
 import secret from '../fixtures/experimental.json' assert { type: 'json' };
 
 strictEqual(secret.ofLife, 42);
+
+// Test warning message
+const child = spawn(process.execPath, [
+  '--experimental-json-modules',
+  path('/es-modules/json-modules.mjs'),
+]);
+
+let stderr = '';
+child.stderr.setEncoding('utf8');
+child.stderr.on('data', (data) => {
+  stderr += data;
+});
+child.on('close', (code, signal) => {
+  strictEqual(code, 0);
+  strictEqual(signal, null);
+  ok(stderr.toString().includes(
+    'ExperimentalWarning: Importing JSON modules is an experimental feature. ' +
+    'This feature could change at any time'
+  ));
+});