Fix crash in LSP servers when initializationOptions are not provided

extensions/css-language-features/server/src/cssServer.ts

@@ -67,7 +67,7 @@ export function startServer(connection: Connection, runtime: RuntimeEnvironment)
 			}
 		}
 
-		requestService = getRequestService(params.initializationOptions.handledSchemas || ['file'], connection, runtime);
+		requestService = getRequestService(params.initializationOptions?.handledSchemas || ['file'], connection, runtime);
 
 		function getClientCapability<T>(name: string, def: T) {
 			const keys = name.split('.');

extensions/html-language-features/server/src/htmlServer.ts

@@ -112,16 +112,16 @@ export function startServer(connection: Connection, runtime: RuntimeEnvironment)
 			}
 		}
 
-		requestService = getRequestService(params.initializationOptions.handledSchemas || ['file'], connection, runtime);
+		requestService = getRequestService(initializationOptions?.handledSchemas || ['file'], connection, runtime);
 
 		const workspace = {
 			get settings() { return globalSettings; },
 			get folders() { return workspaceFolders; }
 		};
 
-		languageModes = getLanguageModes(initializationOptions ? initializationOptions.embeddedLanguages : { css: true, javascript: true }, workspace, params.capabilities, requestService);
+		languageModes = getLanguageModes(initializationOptions?.embeddedLanguages || { css: true, javascript: true }, workspace, params.capabilities, requestService);
 
-		const dataPaths: string[] = params.initializationOptions.dataPaths || [];
+		const dataPaths: string[] = initializationOptions?.dataPaths || [];
 		fetchHTMLDataProviders(dataPaths, requestService).then(dataProviders => {
 			languageModes.updateDataProviders(dataProviders);
 		});
@@ -146,7 +146,7 @@ export function startServer(connection: Connection, runtime: RuntimeEnvironment)
 		}
 
 		clientSnippetSupport = getClientCapability('textDocument.completion.completionItem.snippetSupport', false);
-		dynamicFormatterRegistration = getClientCapability('textDocument.rangeFormatting.dynamicRegistration', false) && (typeof params.initializationOptions.provideFormatter !== 'boolean');
+		dynamicFormatterRegistration = getClientCapability('textDocument.rangeFormatting.dynamicRegistration', false) && (typeof initializationOptions?.provideFormatter !== 'boolean');
 		scopedSettingsSupport = getClientCapability('workspace.configuration', false);
 		workspaceFoldersSupport = getClientCapability('workspace.workspaceFolders', false);
 		foldingRangeLimit = getClientCapability('textDocument.foldingRange.rangeLimit', Number.MAX_VALUE);
@@ -155,7 +155,7 @@ export function startServer(connection: Connection, runtime: RuntimeEnvironment)
 			completionProvider: clientSnippetSupport ? { resolveProvider: true, triggerCharacters: ['.', ':', '<', '"', '=', '/'] } : undefined,
 			hoverProvider: true,
 			documentHighlightProvider: true,
-			documentRangeFormattingProvider: params.initializationOptions.provideFormatter === true,
+			documentRangeFormattingProvider: initializationOptions?.provideFormatter === true,
 			documentLinkProvider: { resolveProvider: false },
 			documentSymbolProvider: true,
 			definitionProvider: true,

extensions/json-language-features/server/src/jsonServer.ts

@@ -137,7 +137,7 @@ export function startServer(connection: Connection, runtime: RuntimeEnvironment)
 			} : undefined,
 			hoverProvider: true,
 			documentSymbolProvider: true,
-			documentRangeFormattingProvider: params.initializationOptions.provideFormatter === true,
+			documentRangeFormattingProvider: params.initializationOptions?.provideFormatter === true,
 			colorProvider: {},
 			foldingRangeProvider: true,
 			selectionRangeProvider: true,