dotnet · dibarbet · Aug 3, 2026
@@ -181,17 +181,17 @@
             "request": "launch",
             "name": "Debug task",
             "preLaunchTask": "build",
-            "program": "${workspaceFolder}/node_modules/ts-node/dist/bin.js",
-            "args": ["tasks/${input:taskScript}"],
+            "runtimeArgs": ["--import", "tsx"],
+            "program": "${workspaceFolder}/tasks/${input:taskScript}",
             "cwd": "${workspaceFolder}"
         },
         {
             "type": "node",
             "request": "launch",
             "name": "Update OmniSharp package dependencies",
             "preLaunchTask": "build",
-            "program": "${workspaceFolder}/node_modules/ts-node/dist/bin.js",
-            "args": ["tasks/debugger/updatePackageDependencies.ts"],
+            "runtimeArgs": ["--import", "tsx"],
+            "program": "${workspaceFolder}/tasks/debugger/updatePackageDependencies.ts",
             "env": {
                 "NEW_DEPS_ID": "OmniSharp",
                 "NEW_DEPS_URLS": "https://roslynomnisharp.blob.core.windows.net/releases/1.39.14/omnisharp-linux-x64.zip,https://roslynomnisharp.blob.core.windows.net/releases/1.39.14/omnisharp-linux-x86.zip,https://roslynomnisharp.blob.core.windows.net/releases/1.39.14/omnisharp-linux-arm64.zip,https://roslynomnisharp.blob.core.windows.net/releases/1.39.14/omnisharp-osx.zip,https://roslynomnisharp.blob.core.windows.net/releases/1.39.14/omnisharp-win-x64.zip,https://roslynomnisharp.blob.core.windows.net/releases/1.39.14/omnisharp-win-arm64.zip,https://roslynomnisharp.blob.core.windows.net/releases/1.39.14/omnisharp-linux-musl-x64-net6.0.zip,https://roslynomnisharp.blob.core.windows.net/releases/1.39.14/omnisharp-linux-musl-arm64-net6.0.zip,https://roslynomnisharp.blob.core.windows.net/releases/1.39.14/omnisharp-linux-x64-net6.0.zip,https://roslynomnisharp.blob.core.windows.net/releases/1.39.14/omnisharp-linux-arm64-net6.0.zip,https://roslynomnisharp.blob.core.windows.net/releases/1.39.14/omnisharp-osx-x64-net6.0.zip,https://roslynomnisharp.blob.core.windows.net/releases/1.39.14/omnisharp-osx-arm64-net6.0.zip,https://roslynomnisharp.blob.core.windows.net/releases/1.39.14/omnisharp-win-x64-net6.0.zip,https://roslynomnisharp.blob.core.windows.net/releases/1.39.14/omnisharp-win-arm64-net6.0.zip",
@@ -205,8 +205,8 @@
             "request": "launch",
             "name": "Update razor telemetry package dependencies",
             "preLaunchTask": "build",
-            "program": "${workspaceFolder}/node_modules/ts-node/dist/bin.js",
-            "args": ["tasks/debugger/updatePackageDependencies.ts"],
+            "runtimeArgs": ["--import", "tsx"],
+            "program": "${workspaceFolder}/tasks/debugger/updatePackageDependencies.ts",
             "env": {
                 "NEW_DEPS_URLS": "https://download.visualstudio.microsoft.com/download/pr/534f8426-a4f4-4b2d-b3ba-c4e16a38c48c/704e369c5905f9ece819ebce77fb78d8/devkittelemetry-linux-arm64-7.0.0-preview.24178.4.zip,https://download.visualstudio.microsoft.com/download/pr/534f8426-a4f4-4b2d-b3ba-c4e16a38c48c/4049a66147717a53860bbc969bf32faa/devkittelemetry-linux-musl-arm64-7.0.0-preview.24178.4.zip,https://download.visualstudio.microsoft.com/download/pr/534f8426-a4f4-4b2d-b3ba-c4e16a38c48c/c75e84ff813be5c9833d96dc2066a364/devkittelemetry-linux-musl-x64-7.0.0-preview.24178.4.zip,https://download.visualstudio.microsoft.com/download/pr/534f8426-a4f4-4b2d-b3ba-c4e16a38c48c/f58cf629939f0df77d142be881f9e233/devkittelemetry-linux-x64-7.0.0-preview.24178.4.zip,https://download.visualstudio.microsoft.com/download/pr/534f8426-a4f4-4b2d-b3ba-c4e16a38c48c/1c912419ea45c8d95cfa28a8a04640dc/devkittelemetry-osx-arm64-7.0.0-preview.24178.4.zip,https://download.visualstudio.microsoft.com/download/pr/534f8426-a4f4-4b2d-b3ba-c4e16a38c48c/36545ba0998f1fc380e877e38b2f35f1/devkittelemetry-osx-x64-7.0.0-preview.24178.4.zip,https://download.visualstudio.microsoft.com/download/pr/534f8426-a4f4-4b2d-b3ba-c4e16a38c48c/0a32698e8ba1ab93489d79f34f8ae8d0/devkittelemetry-platformagnostic-7.0.0-preview.24178.4.zip,https://download.visualstudio.microsoft.com/download/pr/534f8426-a4f4-4b2d-b3ba-c4e16a38c48c/4f16ff826fedd33ad80d265c5409588b/devkittelemetry-win-arm64-7.0.0-preview.24178.4.zip,https://download.visualstudio.microsoft.com/download/pr/534f8426-a4f4-4b2d-b3ba-c4e16a38c48c/5a98d8f4e481dbb7ae3cdb3695b75c46/devkittelemetry-win-x64-7.0.0-preview.24178.4.zip",
                 "NEW_DEPS_VERSION": "7.0.0-preview.24178.4",
@@ -219,17 +219,17 @@
             "request": "launch",
             "name": "Generate debugger options schema",
             "preLaunchTask": "build",
-            "program": "${workspaceFolder}/node_modules/ts-node/dist/bin.js",
-            "args": ["tasks/debugger/generateOptionsSchema.ts"],
+            "runtimeArgs": ["--import", "tsx"],
+            "program": "${workspaceFolder}/tasks/debugger/generateOptionsSchema.ts",
             "cwd": "${workspaceFolder}"
         },
         {
             "type": "node",
             "request": "launch",
             "name": "Razor Cohost integration tests",
             "preLaunchTask": "build",
-            "program": "${workspaceFolder}/node_modules/ts-node/dist/bin.js",
-            "args": ["tasks/tests/testIntegrationRazorCohost.ts"],
+            "runtimeArgs": ["--import", "tsx"],
+            "program": "${workspaceFolder}/tasks/tests/testIntegrationRazorCohost.ts",
             "cwd": "${workspaceFolder}"
         }
     ],

@@ -49,7 +49,7 @@ package-lock.json
 tsconfig.json
 version.json
 wallaby.js
-esbuild.js
+esbuild.mjs
 !src/razor/language-configuration.json
 !src/razor/syntaxes/*
 

@@ -0,0 +1,31 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+import { readFileSync } from 'node:fs';
+import { createDefaultEsmPreset, createDefaultPreset } from 'ts-jest';
+
+const packageJson = JSON.parse(readFileSync(new URL('./package.json', import.meta.url), 'utf8'));
+// The override lets tooling validate the ESM transform before the repository package type changes.
+const useESM = packageJson.type === 'module' || process.env.JEST_USE_ESM === 'true';
+const tsJestPreset = useESM
+    ? createDefaultEsmPreset({ tsconfig: './tsconfig.json' })
+    : createDefaultPreset({ tsconfig: './tsconfig.json' });
+
+/**
+ * Defines a base project config that we can re-use across the project specific jest configs.
+ * We do this because jest generally does not inherit project configuration settings.
+ */
+/** @type {import('jest').Config} */
+export const baseProjectConfig = {
+    ...tsJestPreset,
+    testEnvironment: 'node',
+    transformIgnorePatterns: ['/dist/.+\\.js'],
+    ...(useESM
+        ? {
+              moduleNameMapper: {
+                  '^(\\.{1,2}/.*)\\.js$': '$1',
+              },
+          }
+        : {}),
+};
@@ -1,5 +1,5 @@
-const esbuild = require("esbuild");
-const fs = require('fs/promises');
+import esbuild from 'esbuild';
+import fs from 'node:fs/promises';
 
 const production = process.argv.includes('--production');
 const watch = process.argv.includes('--watch');
@@ -44,9 +44,7 @@ const umdEsmLoaderPlugin = {
 
 async function main() {
     const ctx = await esbuild.context({
-        entryPoints: [
-            'src/main.ts'
-        ],
+        entryPoints: ['src/main.ts'],
         bundle: true,
         format: 'esm',
         banner: {
@@ -81,7 +79,7 @@ async function main() {
     }
 }
 
-main().catch(e => {
+main().catch((e) => {
     console.error(e);
     process.exit(1);
-});
+});
@@ -23,7 +23,7 @@ const compatibleHeaderPlugin = fixupPluginRules({
 
 export default defineConfig([
     {
-        ignores: ['out/**', 'dist/**', 'wallaby.js', 'eslint.config.mjs', 'esbuild.js', '**/*.d.ts'],
+        ignores: ['out/**', 'dist/**', 'wallaby.js', 'eslint.config.mjs', 'esbuild.mjs', '**/*.d.ts'],
     },
     {
         files: ['**/*.ts'],

@@ -2,19 +2,18 @@
  *  Copyright (c) Microsoft Corporation. All rights reserved.
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
-import type { Config } from 'jest';
-
-const config: Config = {
+/** @type {import('jest').Config} */
+const config = {
     projects: [
-        '<rootDir>/test/lsptoolshost/artifactTests/jest.config.ts',
-        '<rootDir>/test/lsptoolshost/integrationTests/jest.config.ts',
-        '<rootDir>/test/lsptoolshost/unitTests/jest.config.ts',
-        '<rootDir>/test/omnisharp/omnisharpIntegrationTests/jest.config.ts',
-        '<rootDir>/test/omnisharp/omnisharpUnitTests/jest.config.ts',
-        '<rootDir>/test/razor/razorIntegrationTests/jest.config.ts',
-        '<rootDir>/test/razor/razorTests/jest.config.ts',
-        '<rootDir>/test/untrustedWorkspace/integrationTests/jest.config.ts',
-        '<rootDir>/test/tasks/jest.config.ts',
+        '<rootDir>/test/lsptoolshost/artifactTests/jest.config.mjs',
+        '<rootDir>/test/lsptoolshost/integrationTests/jest.config.mjs',
+        '<rootDir>/test/lsptoolshost/unitTests/jest.config.mjs',
+        '<rootDir>/test/omnisharp/omnisharpIntegrationTests/jest.config.mjs',
+        '<rootDir>/test/omnisharp/omnisharpUnitTests/jest.config.mjs',
+        '<rootDir>/test/razor/razorIntegrationTests/jest.config.mjs',
+        '<rootDir>/test/razor/razorTests/jest.config.mjs',
+        '<rootDir>/test/untrustedWorkspace/integrationTests/jest.config.mjs',
+        '<rootDir>/test/tasks/jest.config.mjs',
     ],
     // Reporters are a global jest configuration property and cannot be set in the project jest config.
     // This configuration will create a 'junit.xml' file in the output directory, no matter which test project is running.