Support webWorker clients

actions-languageserver/src/index.ts

@@ -1,7 +1,26 @@
-import {createConnection} from "vscode-languageserver/node";
+import {Connection} from "vscode-languageserver";
+import {
+  BrowserMessageReader,
+  BrowserMessageWriter,
+  createConnection as createBrowserConnection
+} from "vscode-languageserver/browser";
+import {createConnection as createNodeConnection} from "vscode-languageserver/node";
 
 import {initConnection} from "./connection";
 
-// By default create node connection
-const connection = createConnection();
-initConnection(connection);
+/** Helper function determining whether we are executing with node runtime */
+function isNode(): boolean {
+  return typeof process !== "undefined" && process.versions?.node != null;
+}
+
+function getConnection(): Connection {
+  if (isNode()) {
+    return createNodeConnection();
+  } else {
+    const messageReader = new BrowserMessageReader(self);
+    const messageWriter = new BrowserMessageWriter(self);
+    return createBrowserConnection(messageReader, messageWriter);
+  }
+}
+
+initConnection(getConnection());