diff --git a/packages/language-server/src/plugins/TypeScriptPlugin.ts b/packages/language-server/src/plugins/TypeScriptPlugin.ts
index bdd36d7a1..125719623 100644
--- a/packages/language-server/src/plugins/TypeScriptPlugin.ts
+++ b/packages/language-server/src/plugins/TypeScriptPlugin.ts
@@ -91,12 +91,9 @@ export class TypeScriptPlugin
         let diagnostics: ts.Diagnostic[] = [
             ...lang.getSyntacticDiagnostics(document.getFilePath()!),
             ...lang.getSuggestionDiagnostics(document.getFilePath()!),
+            ...lang.getSemanticDiagnostics(document.getFilePath()!)
         ];
 
-        if (isTypescript) {
-            diagnostics.push(...lang.getSemanticDiagnostics(document.getFilePath()!));
-        }
-
         return diagnostics.map(diagnostic => ({
             range: convertRange(document, diagnostic),
             severity: mapSeverity(diagnostic.category),
diff --git a/packages/language-server/src/plugins/typescript/service.ts b/packages/language-server/src/plugins/typescript/service.ts
index 3c1d0082b..8abdd6903 100644
--- a/packages/language-server/src/plugins/typescript/service.ts
+++ b/packages/language-server/src/plugins/typescript/service.ts
@@ -1,8 +1,9 @@
 import ts from 'typescript';
 import { DocumentSnapshot } from './DocumentSnapshot';
-import { isSvelte } from './utils';
-import { dirname } from 'path';
+import { isSvelte, getScriptKindFromFileName } from './utils';
+import { dirname, resolve } from 'path';
 import { Document } from '../../api';
+import { getSveltePackageInfo } from '../svelte/sveltePackage';
 
 export interface LanguageServiceContainer {
     getService(): ts.LanguageService;
@@ -40,6 +41,7 @@ export function createLanguageService(
 ): LanguageServiceContainer {
     const workspacePath = tsconfigPath ? dirname(tsconfigPath) : '';
     const documents = new Map<string, DocumentSnapshot>();
+    const sveltePkgInfo = getSveltePackageInfo(workspacePath);
 
     let compilerOptions: ts.CompilerOptions = {
         allowNonTsExtensions: true,
@@ -47,6 +49,9 @@ export function createLanguageService(
         module: ts.ModuleKind.ESNext,
         moduleResolution: ts.ModuleResolutionKind.NodeJs,
         allowJs: true,
+        types: [
+            resolve(sveltePkgInfo.path, 'types', 'runtime')
+        ]
     };
 
     const configJson = tsconfigPath && ts.readConfigFile(tsconfigPath, ts.sys.readFile).config;
@@ -82,9 +87,18 @@ export function createLanguageService(
         },
         getCurrentDirectory: () => workspacePath,
         getDefaultLibFileName: ts.getDefaultLibFilePath,
+
         fileExists: ts.sys.fileExists,
         readFile: ts.sys.readFile,
         readDirectory: ts.sys.readDirectory,
+        getScriptKind: (fileName: string) => {
+            const doc = getSvelteSnapshot(fileName);
+            if(doc) {
+                return doc.scriptKind;
+            }
+
+            return getScriptKindFromFileName(fileName);
+        },
     };
     let languageService = ts.createLanguageService(host);