chore: require VS Code 1.101 and remove legacy WebSocket compatibility

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## Unreleased
+
+### Compatibility and upgrade notes
+
+- Raised the minimum supported VS Code version to **1.101.0** (Node.js 22). (#1850)
+
 ## 3.2.1 - 2026-10-24
 
 ### Improvements and bug fixes
@@ -257,38 +263,38 @@ same user/workspace scope).
 
 ### Features
 
-* feat: change default of r.lsp.multiServer to false
+- feat: change default of r.lsp.multiServer to false
 
 **Full Changelog**: <https://github.com/REditorSupport/vscode-R/compare/v2.8.7...v2.8.8>
 
 ## 2.8.7 - 2026-03-15
 
 ### Bug Fixes
 
-* fix: correct r.term and r.path setting names in error message
+- fix: correct r.term and r.path setting names in error message
 
 ### Features
 
-* feat: support multi-root workspaces in single-server mode
+- feat: support multi-root workspaces in single-server mode
 
 ### Other
 
-* Allow bracketedPaste on win32 platform ([#1631](https://github.com/REditorSupport/vscode-R/issues/1631))
-* feat: default to single language server for multi-root workspaces ([#1682](https://github.com/REditorSupport/vscode-R/issues/1682))
+- Allow bracketedPaste on win32 platform ([#1631](https://github.com/REditorSupport/vscode-R/issues/1631))
+- feat: default to single language server for multi-root workspaces ([#1682](https://github.com/REditorSupport/vscode-R/issues/1682))
 
 **Full Changelog**: <https://github.com/REditorSupport/vscode-R/compare/v2.8.6...v2.8.7>
 
 ## 2.8.6 - 2025-05-31
 
 ### Other
 
-* Syntax update and bump to 2.8.6 ([#1605](https://github.com/REditorSupport/vscode-R/issues/1605))
-* Show sidebar icon only when extension is active ([#1579](https://github.com/REditorSupport/vscode-R/issues/1579))
-* Move R and R markdown syntaxes to vscode-R-syntax ([#1606](https://github.com/REditorSupport/vscode-R/issues/1606))
+- Syntax update and bump to 2.8.6 ([#1605](https://github.com/REditorSupport/vscode-R/issues/1605))
+- Show sidebar icon only when extension is active ([#1579](https://github.com/REditorSupport/vscode-R/issues/1579))
+- Move R and R markdown syntaxes to vscode-R-syntax ([#1606](https://github.com/REditorSupport/vscode-R/issues/1606))
 
 ### Refactor
 
-* refactor: restructure files ([#1613](https://github.com/REditorSupport/vscode-R/issues/1613))
+- refactor: restructure files ([#1613](https://github.com/REditorSupport/vscode-R/issues/1613))
 
 **Full Changelog**: <https://github.com/REditorSupport/vscode-R/compare/v2.8.5...v2.8.6>
 

README.md

@@ -30,7 +30,7 @@ for other changes and upgrade notes.
     install.packages("languageserver")
     ```
 
-3. Install the stable release of this extension from the [VS Code Marketplace](https://marketplace.visualstudio.com/items?itemName=reditorsupport.r) or the [Open VSX Registry](https://open-vsx.org/extension/reditorsupport/r). This release requires VS Code 1.110 or later.
+3. Install the stable release of this extension from the [VS Code Marketplace](https://marketplace.visualstudio.com/items?itemName=reditorsupport.r) or the [Open VSX Registry](https://open-vsx.org/extension/reditorsupport/r). This release requires VS Code 1.101.0 or later.
 
     ```sh
     code --install-extension REditorSupport.r

esbuild.js

@@ -72,6 +72,7 @@ async function main() {
         sourcemap: !production,
         sourcesContent: false,
         platform: 'node',
+        target: 'node22',
         outfile: 'dist/extension.js',
         external: ['vscode', 'utf-8-validate', 'bufferutil'],
         logLevel: 'info',

package.json

@@ -27,7 +27,7 @@
     "R Markdown"
   ],
   "engines": {
-    "vscode": "^1.98.2"
+    "vscode": "^1.101.0"
   },
   "activationEvents": [
     "workspaceContains:**/*.{rproj,Rproj,r,R,rd,Rd,rmd,Rmd}",
@@ -2619,7 +2619,7 @@
     "@types/mocha": "^8.2.3",
     "@types/node": "^22.20.5",
     "@types/sinon": "^10.0.20",
-    "@types/vscode": "~1.94.0",
+    "@types/vscode": "~1.101.0",
     "@types/winreg": "^1.2.36",
     "@vscode/test-cli": "^0.0.15",
     "@vscode/test-electron": "^3.1.0",

src/plotViewer/httpgdClient.ts

@@ -264,9 +264,7 @@ export class HttpgdClient {
     }
 
     private openWebSocket(): void {
-        // TODO: Remove this missing-WebSocket compatibility path when the minimum
-        // extension host provides Node 22. Keep polling for connection failures.
-        if (typeof globalThis.WebSocket !== 'function' || !this.controller || this.socket) {
+        if (!this.controller || this.socket) {
             return;
         }
         this.retryAt = Date.now() + this.retryInterval;

src/test/node/httpgdClient.test.ts

@@ -47,7 +47,6 @@ suite('Internal httpgd client', () => {
     let remote: HttpgdState;
     let ids: string[];
     let requests: { path: string; token?: string }[];
-    let websocketDescriptor: PropertyDescriptor | undefined;
     let held: ServerResponse[];
     let holdPlots: boolean;
     let invalidPlots: boolean;
@@ -62,12 +61,7 @@ suite('Internal httpgd client', () => {
         holdPlots = invalidPlots = false;
         notifications = [];
         TestWebSocket.instances = [];
-        websocketDescriptor = Object.getOwnPropertyDescriptor(globalThis, 'WebSocket');
-        Object.defineProperty(globalThis, 'WebSocket', {
-            value: undefined,
-            configurable: true,
-            writable: true,
-        });
+        globalThis.WebSocket = TestWebSocket as unknown as typeof WebSocket;
         server = createServer((request, response) => {
             const url = new URL(request.url ?? '/', origin);
             requests.push({
@@ -122,11 +116,7 @@ suite('Internal httpgd client', () => {
     });
     teardown(async () => {
         client.disconnect();
-        if (websocketDescriptor) {
-            Object.defineProperty(globalThis, 'WebSocket', websocketDescriptor);
-        } else {
-            Reflect.deleteProperty(globalThis, 'WebSocket');
-        }
+        globalThis.WebSocket = nativeWebSocket;
         for (const response of held) {
             response.destroy();
         }
@@ -161,9 +151,7 @@ suite('Internal httpgd client', () => {
         assert.deepStrictEqual(notifications, [['1'], []]);
     });
     test('polls a server on port 10080, including when native WebSocket rejects it', async () => {
-        if (typeof nativeWebSocket === 'function') {
-            globalThis.WebSocket = nativeWebSocket;
-        }
+        globalThis.WebSocket = nativeWebSocket;
         await new Promise<void>((resolve, reject) =>
             server.close((error) => (error ? reject(error) : resolve())),
         );
@@ -186,7 +174,7 @@ suite('Internal httpgd client', () => {
         await until(() => client.getPlots()[0]?.id === '2');
         assert.deepStrictEqual(await client.getPlotBytes({ id: '2', renderer: 'png' }), binary);
     });
-    test('polls without WebSocket and only fetches plots after a state change', async () => {
+    test('polls when WebSocket cannot connect and only fetches changed plots', async () => {
         await client.connect();
         await until(() => requests.filter((request) => request.path === '/state').length >= 2);
         assert.strictEqual(requests.filter((request) => request.path === '/plots').length, 1);
@@ -196,7 +184,6 @@ suite('Internal httpgd client', () => {
         assert.deepStrictEqual(notifications, [['1'], ['1', '2']]);
     });
     test('uses native WebSocket notifications and falls back after a disconnect', async () => {
-        globalThis.WebSocket = TestWebSocket as unknown as typeof WebSocket;
         await client.connect();
         const socket = TestWebSocket.instances[0];
         assert.strictEqual(socket.url.protocol, 'ws:');
@@ -215,12 +202,7 @@ suite('Internal httpgd client', () => {
         TestWebSocket.instances[1].open();
         await until(() => requests.filter((request) => request.path === '/plots').length >= 5);
     });
-    test('receives notifications through an actual native WebSocket connection', async function () {
-        if (typeof nativeWebSocket !== 'function') {
-            this.skip();
-            return;
-        }
-
+    test('receives notifications through an actual native WebSocket connection', async () => {
         const handshakeTimeoutMs = 5000;
         const testOrigin = origin;
         const actualServer = server;
@@ -401,15 +383,13 @@ suite('Internal httpgd client', () => {
         }
     });
     test('falls back when WebSocket cannot open', async () => {
-        globalThis.WebSocket = TestWebSocket as unknown as typeof WebSocket;
         await client.connect();
         await until(() => TestWebSocket.instances[0].readyState === 3);
         ids = ['2'];
         remote = { ...remote, upid: 2 };
         await until(() => client.getPlots()[0]?.id === '2');
     });
     test('serializes plot refreshes and retains updates received during a request', async () => {
-        globalThis.WebSocket = TestWebSocket as unknown as typeof WebSocket;
         await client.connect();
         const socket = TestWebSocket.instances[0];
         socket.open();