diff --git a/extensions/html/server/src/modes/javascriptMode.ts b/extensions/html/server/src/modes/javascriptMode.ts
index deb1bc2977e..52377fab1cc 100644
--- a/extensions/html/server/src/modes/javascriptMode.ts
+++ b/extensions/html/server/src/modes/javascriptMode.ts
@@ -23,12 +23,19 @@ export function getJavascriptMode(documentRegions: LanguageModelCache<HTMLDocume
 
 	let compilerOptions: ts.CompilerOptions = { allowNonTsExtensions: true, allowJs: true, target: ts.ScriptTarget.Latest, moduleResolution: ts.ModuleResolutionKind.Classic };
 	let currentTextDocument: TextDocument;
+	let scriptFileVersion: number = 0;
+	function updateCurrentTextDocument(doc: TextDocument) {
+		if (!currentTextDocument || doc.uri !== currentTextDocument.uri || doc.version !== currentTextDocument.version) {
+			currentTextDocument = jsDocuments.get(doc);
+			scriptFileVersion++;
+		}
+	}
 	let host = {
 		getCompilationSettings: () => compilerOptions,
 		getScriptFileNames: () => [FILE_NAME, JQUERY_D_TS],
 		getScriptVersion: (fileName: string) => {
 			if (fileName === FILE_NAME) {
-				return String(currentTextDocument.version);
+				return String(scriptFileVersion);
 			}
 			return '1'; // default lib an jquery.d.ts are static
 		},
@@ -62,7 +69,7 @@ export function getJavascriptMode(documentRegions: LanguageModelCache<HTMLDocume
 			settings = options && options.javascript;
 		},
 		doValidation(document: TextDocument): Diagnostic[] {
-			currentTextDocument = jsDocuments.get(document);
+			updateCurrentTextDocument(document);
 			const diagnostics = jsLanguageService.getSyntacticDiagnostics(FILE_NAME);
 			return diagnostics.map((diag): Diagnostic => {
 				return {
@@ -73,7 +80,7 @@ export function getJavascriptMode(documentRegions: LanguageModelCache<HTMLDocume
 			});
 		},
 		doComplete(document: TextDocument, position: Position): CompletionList {
-			currentTextDocument = jsDocuments.get(document);
+			updateCurrentTextDocument(document);
 			let offset = currentTextDocument.offsetAt(position);
 			let completions = jsLanguageService.getCompletionsAtPosition(FILE_NAME, offset);
 			if (!completions) {
@@ -100,7 +107,7 @@ export function getJavascriptMode(documentRegions: LanguageModelCache<HTMLDocume
 			};
 		},
 		doResolve(document: TextDocument, item: CompletionItem): CompletionItem {
-			currentTextDocument = jsDocuments.get(document);
+			updateCurrentTextDocument(document);
 			let details = jsLanguageService.getCompletionEntryDetails(FILE_NAME, item.data.offset, item.label);
 			if (details) {
 				item.detail = ts.displayPartsToString(details.displayParts);
@@ -110,7 +117,7 @@ export function getJavascriptMode(documentRegions: LanguageModelCache<HTMLDocume
 			return item;
 		},
 		doHover(document: TextDocument, position: Position): Hover {
-			currentTextDocument = jsDocuments.get(document);
+			updateCurrentTextDocument(document);
 			let info = jsLanguageService.getQuickInfoAtPosition(FILE_NAME, currentTextDocument.offsetAt(position));
 			if (info) {
 				let contents = ts.displayPartsToString(info.displayParts);
@@ -122,7 +129,7 @@ export function getJavascriptMode(documentRegions: LanguageModelCache<HTMLDocume
 			return null;
 		},
 		doSignatureHelp(document: TextDocument, position: Position): SignatureHelp {
-			currentTextDocument = jsDocuments.get(document);
+			updateCurrentTextDocument(document);
 			let signHelp = jsLanguageService.getSignatureHelpItems(FILE_NAME, currentTextDocument.offsetAt(position));
 			if (signHelp) {
 				let ret: SignatureHelp = {
@@ -159,7 +166,7 @@ export function getJavascriptMode(documentRegions: LanguageModelCache<HTMLDocume
 			return null;
 		},
 		findDocumentHighlight(document: TextDocument, position: Position): DocumentHighlight[] {
-			currentTextDocument = jsDocuments.get(document);
+			updateCurrentTextDocument(document);
 			let occurrences = jsLanguageService.getOccurrencesAtPosition(FILE_NAME, currentTextDocument.offsetAt(position));
 			if (occurrences) {
 				return occurrences.map(entry => {
@@ -172,7 +179,7 @@ export function getJavascriptMode(documentRegions: LanguageModelCache<HTMLDocume
 			return null;
 		},
 		findDocumentSymbols(document: TextDocument): SymbolInformation[] {
-			currentTextDocument = jsDocuments.get(document);
+			updateCurrentTextDocument(document);
 			let items = jsLanguageService.getNavigationBarItems(FILE_NAME);
 			if (items) {
 				let result: SymbolInformation[] = [];
@@ -208,7 +215,7 @@ export function getJavascriptMode(documentRegions: LanguageModelCache<HTMLDocume
 			return null;
 		},
 		findDefinition(document: TextDocument, position: Position): Definition {
-			currentTextDocument = jsDocuments.get(document);
+			updateCurrentTextDocument(document);
 			let definition = jsLanguageService.getDefinitionAtPosition(FILE_NAME, currentTextDocument.offsetAt(position));
 			if (definition) {
 				return definition.filter(d => d.fileName === FILE_NAME).map(d => {
@@ -221,7 +228,7 @@ export function getJavascriptMode(documentRegions: LanguageModelCache<HTMLDocume
 			return null;
 		},
 		findReferences(document: TextDocument, position: Position): Location[] {
-			currentTextDocument = jsDocuments.get(document);
+			updateCurrentTextDocument(document);
 			let references = jsLanguageService.getReferencesAtPosition(FILE_NAME, currentTextDocument.offsetAt(position));
 			if (references) {
 				return references.filter(d => d.fileName === FILE_NAME).map(d => {
@@ -234,7 +241,7 @@ export function getJavascriptMode(documentRegions: LanguageModelCache<HTMLDocume
 			return null;
 		},
 		format(document: TextDocument, range: Range, formatParams: FormattingOptions): TextEdit[] {
-			currentTextDocument = jsDocuments.get(document);
+			updateCurrentTextDocument(document);
 			let initialIndentLevel = computeInitialIndent(document, range, formatParams);
 			let formatSettings = convertOptions(formatParams, settings && settings.format, initialIndentLevel + 1);
 			let start = currentTextDocument.offsetAt(range.start);
diff --git a/extensions/html/server/src/test/fixtures/expected/19813-4spaces.html b/extensions/html/server/src/test/fixtures/expected/19813-4spaces.html
new file mode 100644
index 00000000000..95150e708fe
--- /dev/null
+++ b/extensions/html/server/src/test/fixtures/expected/19813-4spaces.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+    <meta charset="utf-8">
+    <script>
+        Polymer({
+            is: "chat-messages",
+            properties: {
+                user: {},
+                friend: {
+                    observer: "_friendChanged"
+                }
+            },
+        });
+
+    </script>
+</head>
+
+<body> </body>
+
+</html>
\ No newline at end of file
diff --git a/extensions/html/server/src/test/fixtures/expected/19813-tab.html b/extensions/html/server/src/test/fixtures/expected/19813-tab.html
new file mode 100644
index 00000000000..4413c5ef3b3
--- /dev/null
+++ b/extensions/html/server/src/test/fixtures/expected/19813-tab.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+	<meta charset="utf-8">
+	<script>
+		Polymer({
+			is: "chat-messages",
+			properties: {
+				user: {},
+				friend: {
+					observer: "_friendChanged"
+				}
+			},
+		});
+
+	</script>
+</head>
+
+<body> </body>
+
+</html>
\ No newline at end of file
diff --git a/extensions/html/server/src/test/fixtures/expected/19813.html b/extensions/html/server/src/test/fixtures/expected/19813.html
new file mode 100644
index 00000000000..04485e3ff71
--- /dev/null
+++ b/extensions/html/server/src/test/fixtures/expected/19813.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+  <meta charset="utf-8">
+  <script>
+    Polymer({
+      is: "chat-messages",
+      properties: {
+        user: {},
+        friend: {
+          observer: "_friendChanged"
+        }
+      },
+    });
+
+  </script>
+</head>
+
+<body> </body>
+
+</html>
\ No newline at end of file
diff --git a/extensions/html/server/src/test/fixtures/inputs/19813.html b/extensions/html/server/src/test/fixtures/inputs/19813.html
new file mode 100644
index 00000000000..e61821b691f
--- /dev/null
+++ b/extensions/html/server/src/test/fixtures/inputs/19813.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <meta charset="utf-8">
+<script>
+    Polymer({
+        is: "chat-messages",
+        properties: {
+             user: {},
+            friend: {
+                observer: "_friendChanged"
+            }
+        },
+    });
+</script>
+</head>
+<body>
+</body>
+</html>
\ No newline at end of file
diff --git a/extensions/html/server/src/test/formatting.test.ts b/extensions/html/server/src/test/formatting.test.ts
index be6a2a5db69..f84114afefe 100644
--- a/extensions/html/server/src/test/formatting.test.ts
+++ b/extensions/html/server/src/test/formatting.test.ts
@@ -4,6 +4,9 @@
  *--------------------------------------------------------------------------------------------*/
 'use strict';
 
+import * as path from 'path'
+import * as fs from 'fs'
+
 import * as assert from 'assert';
 import { getLanguageModes } from '../modes/languageModes';
 import { TextDocument, Range, TextEdit, FormattingOptions } from 'vscode-languageserver-types';
@@ -12,7 +15,7 @@ import { format } from '../modes/formatting';
 
 suite('HTML Embedded Formatting', () => {
 
-	function assertFormat(value: string, expected: string, options?: any): void {
+	function assertFormat(value: string, expected: string, options?: any, formatOptions?: FormattingOptions): void {
 		var languageModes = getLanguageModes({ css: true, javascript: true });
 		if (options) {
 			languageModes.getAllModes().forEach(m => m.configure(options));
@@ -31,7 +34,9 @@ suite('HTML Embedded Formatting', () => {
 		}
 		let document = TextDocument.create('test://test/test.html', 'html', 0, value);
 		let range = Range.create(document.positionAt(rangeStartOffset), document.positionAt(rangeEndOffset));
-		let formatOptions = FormattingOptions.create(2, true);
+		if (!formatOptions) {
+			formatOptions = FormattingOptions.create(2, true);
+		}
 
 		let result = format(languageModes, document, range, formatOptions, { css: true, javascript: true });
 
@@ -39,6 +44,12 @@ suite('HTML Embedded Formatting', () => {
 		assert.equal(actual, expected);
 	}
 
+	function assertFormatWithFixture(fixtureName: string, expectedPath: string, options?: any, formatOptions?: FormattingOptions): void {
+		let input = fs.readFileSync(path.join(__dirname, 'fixtures', 'inputs', fixtureName)).toString();
+		let expected = fs.readFileSync(path.join(__dirname, 'fixtures', 'expected', expectedPath)).toString();
+		assertFormat(input, expected, options, formatOptions);
+	}
+
 	test('HTML only', function (): any {
 		assertFormat('<html><body><p>Hello</p></body></html>', '<html>\n\n<body>\n  <p>Hello</p>\n</body>\n\n</html>');
 		assertFormat('|<html><body><p>Hello</p></body></html>|', '<html>\n\n<body>\n  <p>Hello</p>\n</body>\n\n</html>');
@@ -56,6 +67,12 @@ suite('HTML Embedded Formatting', () => {
 		assertFormat('<html><head>\n  <script>\n|var x=6;|\n</script></head></html>', '<html><head>\n  <script>\n  var x = 6;\n</script></head></html>');
 	});
 
+	test('HTLM & Scripts - Fixtures', function() {
+		assertFormatWithFixture('19813.html', '19813.html');
+		assertFormatWithFixture('19813.html', '19813-4spaces.html', void 0, FormattingOptions.create(4, true));
+		assertFormatWithFixture('19813.html', '19813-tab.html', void 0, FormattingOptions.create(1, false));
+	})
+
 	test('Script end tag', function (): any {
 		assertFormat('<html>\n<head>\n  <script>\nvar x  =  0;\n</script></head></html>', '<html>\n\n<head>\n  <script>\n    var x = 0;\n\n  </script>\n</head>\n\n</html>');
 	});