Only check tsc version for ts files. Fixes #17736

extensions/typescript/src/features/bufferSyncSupport.ts

@@ -182,8 +182,10 @@ export default class BufferSyncSupport {
 		this.syncedBuffers[filepath] = syncedBuffer;
 		syncedBuffer.open();
 		this.requestDiagnostic(filepath);
+		if (document.languageId === 'typescript' || document.languageId === 'typescriptreact') {
 			this.checkTSCVersion();
 		}
+	}
 
 	private onDidCloseTextDocument(document: TextDocument): void {
 		let filepath = this.client.normalizePath(document.uri);