Getting closer to shared config #59803

extensions/emmet/src/abbreviationActions.ts

@@ -340,9 +340,7 @@ export function expandEmmetAbbreviation(args: any): Thenable<boolean | undefined
 	});
 
 	return expandAbbreviationInRange(editor, abbreviationList, allAbbreviationsSame).then(success => {
-		if (!success) {
-			return fallbackTab();
-		}
+		return success ? Promise.resolve(undefined) : fallbackTab();
 	});
 }
 
@@ -581,7 +579,7 @@ function expandAbbreviationInRange(editor: vscode.TextEditor, expandAbbrList: Ex
 /**
  * Expands abbreviation as detailed in given input.
  */
-function expandAbbr(input: ExpandAbbreviationInput): string | undefined {
+function expandAbbr(input: ExpandAbbreviationInput): string {
 	const helper = getEmmetHelper();
 	const expandOptions = helper.getExpandOptions(input.syntax, getEmmetConfiguration(input.syntax), input.filter);
 
@@ -601,9 +599,9 @@ function expandAbbr(input: ExpandAbbreviationInput): string | undefined {
 		}
 	}
 
+	let expandedText;
 	try {
 		// Expand the abbreviation
-		let expandedText;
 
 		if (input.textToWrap) {
 			let parsedAbbr = helper.parseAbbreviation(input.abbreviation, expandOptions);
@@ -628,13 +626,11 @@ function expandAbbr(input: ExpandAbbreviationInput): string | undefined {
 			expandedText = helper.expandAbbreviation(input.abbreviation, expandOptions);
 		}
 
-		return expandedText;
-
 	} catch (e) {
 		vscode.window.showErrorMessage('Failed to expand abbreviation');
 	}
 
-
+	return expandedText;
 }
 
 function getSyntaxFromArgs(args: { [x: string]: string }): string | undefined {

extensions/emmet/src/defaultCompletionProvider.ts

@@ -12,8 +12,8 @@ export class DefaultCompletionItemProvider implements vscode.CompletionItemProvi
 
 	private lastCompletionType: string | undefined;
 
-	public provideCompletionItems(document: vscode.TextDocument, position: vscode.Position, token: vscode.CancellationToken, context: vscode.CompletionContext): Thenable<vscode.CompletionList | undefined> | undefined {
-		const completionResult = this.provideCompletionItemsInternal(document, position, token, context);
+	public provideCompletionItems(document: vscode.TextDocument, position: vscode.Position, _: vscode.CancellationToken, context: vscode.CompletionContext): Thenable<vscode.CompletionList | undefined> | undefined {
+		const completionResult = this.provideCompletionItemsInternal(document, position, context);
 		if (!completionResult) {
 			this.lastCompletionType = undefined;
 			return;
@@ -38,7 +38,7 @@ export class DefaultCompletionItemProvider implements vscode.CompletionItemProvi
 		});
 	}
 
-	private provideCompletionItemsInternal(document: vscode.TextDocument, position: vscode.Position, token: vscode.CancellationToken, context: vscode.CompletionContext): Thenable<vscode.CompletionList | undefined> | undefined {
+	private provideCompletionItemsInternal(document: vscode.TextDocument, position: vscode.Position, context: vscode.CompletionContext): Thenable<vscode.CompletionList | undefined> | undefined {
 		const emmetConfig = vscode.workspace.getConfiguration('emmet');
 		const excludedLanguages = emmetConfig['excludeLanguages'] ? emmetConfig['excludeLanguages'] : [];
 		if (excludedLanguages.indexOf(document.languageId) > -1) {

extensions/emmet/src/editPoint.ts

@@ -69,4 +69,5 @@ function findEditPoint(lineNum: number, editor: vscode.TextEditor, position: vsc
 	if (winner > -1) {
 		return new vscode.Selection(lineNum, winner + 1, lineNum, winner + 1);
 	}
+	return;
 }

extensions/emmet/src/incrementDecrement.ts

@@ -45,7 +45,7 @@ export function update(numString: string, delta: number): string {
 
 	if (m = numString.match(/^\-?(0\d+)/)) {
 		// padded number: preserve padding
-		output = output.replace(/^(\-?)(\d+)/, (str, minus, prefix) =>
+		output = output.replace(/^(\-?)(\d+)/, (_, minus, prefix) =>
 			minus + '0'.repeat(Math.max(0, (m ? m[1].length : 0) - prefix.length)) + prefix);
 	}
 
@@ -102,6 +102,8 @@ export function locate(document: vscode.TextDocument, pos: vscode.Position): vsc
 	if (start !== end && isValidNumber(line.slice(start, end))) {
 		return new vscode.Range(pos.line, start, pos.line, end);
 	}
+
+	return;
 }
 
 /**

extensions/emmet/src/locateFile.ts

@@ -51,7 +51,7 @@ function resolveAbsolute(basePath: string, filePath: string): Promise<string> {
 
 		const next = (ctx: string) => {
 			tryFile(path.resolve(ctx, filePath))
-				.then(resolve, err => {
+				.then(resolve, () => {
 					const dir = path.dirname(ctx);
 					if (!dir || dir === ctx) {
 						return reject(`Unable to locate absolute file ${filePath}`);

extensions/emmet/src/selectItem.ts

@@ -7,24 +7,13 @@ import * as vscode from 'vscode';
 import { validate, parseDocument, isStyleSheet } from './util';
 import { nextItemHTML, prevItemHTML } from './selectItemHTML';
 import { nextItemStylesheet, prevItemStylesheet } from './selectItemStylesheet';
+import { HtmlNode, CssNode } from 'EmmetNode';
 
 export function fetchSelectItem(direction: string): void {
 	if (!validate() || !vscode.window.activeTextEditor) {
 		return;
 	}
 	const editor = vscode.window.activeTextEditor;
-
-	let nextItem: any;
-	let prevItem: any;
-
-	if (isStyleSheet(editor.document.languageId)) {
-		nextItem = nextItemStylesheet;
-		prevItem = prevItemStylesheet;
-	} else {
-		nextItem = nextItemHTML;
-		prevItem = prevItemHTML;
-	}
-
 	let rootNode = parseDocument(editor.document);
 	if (!rootNode) {
 		return;
@@ -35,7 +24,12 @@ export function fetchSelectItem(direction: string): void {
 		const selectionStart = selection.isReversed ? selection.active : selection.anchor;
 		const selectionEnd = selection.isReversed ? selection.anchor : selection.active;
 
-		let updatedSelection = direction === 'next' ? nextItem(selectionStart, selectionEnd, editor, rootNode) : prevItem(selectionStart, selectionEnd, editor, rootNode);
+		let updatedSelection;
+		if (isStyleSheet(editor.document.languageId)) {
+			updatedSelection = direction === 'next' ? nextItemStylesheet(selectionStart, selectionEnd, <CssNode>rootNode!) : prevItemStylesheet(selectionStart, selectionEnd, <CssNode>rootNode!);
+		} else {
+			updatedSelection = direction === 'next' ? nextItemHTML(selectionStart, selectionEnd, editor, <HtmlNode>rootNode!) : prevItemHTML(selectionStart, selectionEnd, editor, <HtmlNode>rootNode!);
+		}
 		newSelections.push(updatedSelection ? updatedSelection : selection);
 	});
 	editor.selections = newSelections;

extensions/emmet/src/selectItemHTML.ts

@@ -6,6 +6,7 @@
 import * as vscode from 'vscode';
 import { getDeepestNode, findNextWord, findPrevWord, getHtmlNode } from './util';
 import { HtmlNode } from 'EmmetNode';
+import { isNumber } from 'util';
 
 export function nextItemHTML(selectionStart: vscode.Position, selectionEnd: vscode.Position, editor: vscode.TextEditor, rootNode: HtmlNode): vscode.Selection | undefined {
 	let currentNode = getHtmlNode(editor.document, rootNode, selectionEnd, false);
@@ -18,12 +19,12 @@ export function nextItemHTML(selectionStart: vscode.Position, selectionEnd: vsco
 	if (currentNode.type !== 'comment') {
 		// If cursor is in the tag name, select tag
 		if (selectionEnd.isBefore(currentNode.open.start.translate(0, currentNode.name.length))) {
-			return getSelectionFromNode(currentNode, editor.document);
+			return getSelectionFromNode(currentNode);
 		}
 
 		// If cursor is in the open tag, look for attributes
 		if (selectionEnd.isBefore(currentNode.open.end)) {
-			let attrSelection = getNextAttribute(selectionStart, selectionEnd, editor.document, currentNode);
+			let attrSelection = getNextAttribute(selectionStart, selectionEnd, currentNode);
 			if (attrSelection) {
 				return attrSelection;
 			}
@@ -50,7 +51,7 @@ export function nextItemHTML(selectionStart: vscode.Position, selectionEnd: vsco
 		}
 	}
 
-	return nextNode && getSelectionFromNode(nextNode, editor.document);
+	return nextNode && getSelectionFromNode(nextNode);
 }
 
 export function prevItemHTML(selectionStart: vscode.Position, selectionEnd: vscode.Position, editor: vscode.TextEditor, rootNode: HtmlNode): vscode.Selection | undefined {
@@ -98,11 +99,11 @@ export function prevItemHTML(selectionStart: vscode.Position, selectionEnd: vsco
 		return undefined;
 	}
 
-	let attrSelection = getPrevAttribute(selectionStart, selectionEnd, editor.document, prevNode);
-	return attrSelection ? attrSelection : getSelectionFromNode(prevNode, editor.document);
+	let attrSelection = getPrevAttribute(selectionStart, selectionEnd, prevNode);
+	return attrSelection ? attrSelection : getSelectionFromNode(prevNode);
 }
 
-function getSelectionFromNode(node: HtmlNode, document: vscode.TextDocument): vscode.Selection | undefined {
+function getSelectionFromNode(node: HtmlNode): vscode.Selection | undefined {
 	if (node && node.open) {
 		let selectionStart = (<vscode.Position>node.open.start).translate(0, 1);
 		let selectionEnd = selectionStart.translate(0, node.name.length);
@@ -112,7 +113,7 @@ function getSelectionFromNode(node: HtmlNode, document: vscode.TextDocument): vs
 	return undefined;
 }
 
-function getNextAttribute(selectionStart: vscode.Position, selectionEnd: vscode.Position, document: vscode.TextDocument, node: HtmlNode): vscode.Selection | undefined {
+function getNextAttribute(selectionStart: vscode.Position, selectionEnd: vscode.Position, node: HtmlNode): vscode.Selection | undefined {
 
 	if (!node.attributes || node.attributes.length === 0 || node.type === 'comment') {
 		return;
@@ -153,6 +154,9 @@ function getNextAttribute(selectionStart: vscode.Position, selectionEnd: vscode.
 
 		if (pos !== undefined) {
 			let [newSelectionStartOffset, newSelectionEndOffset] = findNextWord(attr.value.toString(), pos);
+			if (!isNumber(newSelectionStartOffset) || !isNumber(newSelectionEndOffset)) {
+				return;
+			}
 			if (newSelectionStartOffset >= 0 && newSelectionEndOffset >= 0) {
 				const newSelectionStart = (<vscode.Position>attr.value.start).translate(0, newSelectionStartOffset);
 				const newSelectionEnd = (<vscode.Position>attr.value.start).translate(0, newSelectionEndOffset);
@@ -161,9 +165,11 @@ function getNextAttribute(selectionStart: vscode.Position, selectionEnd: vscode.
 		}
 
 	}
+
+	return;
 }
 
-function getPrevAttribute(selectionStart: vscode.Position, selectionEnd: vscode.Position, document: vscode.TextDocument, node: HtmlNode): vscode.Selection | undefined {
+function getPrevAttribute(selectionStart: vscode.Position, selectionEnd: vscode.Position, node: HtmlNode): vscode.Selection | undefined {
 
 	if (!node.attributes || node.attributes.length === 0 || node.type === 'comment') {
 		return;
@@ -194,12 +200,15 @@ function getPrevAttribute(selectionStart: vscode.Position, selectionEnd: vscode.
 
 		let pos = selectionStart.isAfter(attr.value.end) ? attr.value.toString().length : selectionStart.character - attr.value.start.character;
 		let [newSelectionStartOffset, newSelectionEndOffset] = findPrevWord(attr.value.toString(), pos);
+		if (!isNumber(newSelectionStartOffset) || !isNumber(newSelectionEndOffset)) {
+			return;
+		}
 		if (newSelectionStartOffset >= 0 && newSelectionEndOffset >= 0) {
 			const newSelectionStart = (<vscode.Position>attr.value.start).translate(0, newSelectionStartOffset);
 			const newSelectionEnd = (<vscode.Position>attr.value.start).translate(0, newSelectionEndOffset);
 			return new vscode.Selection(newSelectionStart, newSelectionEnd);
 		}
-
-
 	}
+
+	return;
 }
\ No newline at end of file

extensions/emmet/src/selectItemStylesheet.ts

@@ -7,7 +7,7 @@ import * as vscode from 'vscode';
 import { getDeepestNode, findNextWord, findPrevWord, getNode } from './util';
 import { Node, CssNode, Rule, Property } from 'EmmetNode';
 
-export function nextItemStylesheet(startOffset: vscode.Position, endOffset: vscode.Position, editor: vscode.TextEditor, rootNode: Node): vscode.Selection | undefined {
+export function nextItemStylesheet(startOffset: vscode.Position, endOffset: vscode.Position, rootNode: Node): vscode.Selection | undefined {
 	let currentNode = <CssNode>getNode(rootNode, endOffset, true);
 	if (!currentNode) {
 		currentNode = <CssNode>rootNode;
@@ -17,12 +17,12 @@ export function nextItemStylesheet(startOffset: vscode.Position, endOffset: vsco
 	}
 	// Full property is selected, so select full property value next
 	if (currentNode.type === 'property' && startOffset.isEqual(currentNode.start) && endOffset.isEqual(currentNode.end)) {
-		return getSelectionFromProperty(currentNode, editor.document, startOffset, endOffset, true, 'next');
+		return getSelectionFromProperty(currentNode, startOffset, endOffset, true, 'next');
 	}
 
 	// Part or whole of propertyValue is selected, so select the next word in the propertyValue
 	if (currentNode.type === 'property' && startOffset.isAfterOrEqual((<Property>currentNode).valueToken.start) && endOffset.isBeforeOrEqual((<Property>currentNode).valueToken.end)) {
-		let singlePropertyValue = getSelectionFromProperty(currentNode, editor.document, startOffset, endOffset, false, 'next');
+		let singlePropertyValue = getSelectionFromProperty(currentNode, startOffset, endOffset, false, 'next');
 		if (singlePropertyValue) {
 			return singlePropertyValue;
 		}
@@ -31,7 +31,7 @@ export function nextItemStylesheet(startOffset: vscode.Position, endOffset: vsco
 	// Cursor is in the selector or in a property
 	if ((currentNode.type === 'rule' && endOffset.isBefore((<Rule>currentNode).selectorToken.end))
 		|| (currentNode.type === 'property' && endOffset.isBefore((<Property>currentNode).valueToken.end))) {
-		return getSelectionFromNode(currentNode, editor.document);
+		return getSelectionFromNode(currentNode);
 	}
 
 	// Get the first child of current node which is right after the cursor
@@ -46,11 +46,11 @@ export function nextItemStylesheet(startOffset: vscode.Position, endOffset: vsco
 		currentNode = currentNode.parent;
 	}
 
-	return getSelectionFromNode(nextNode, editor.document);
+	return getSelectionFromNode(nextNode);
 
 }
 
-export function prevItemStylesheet(startOffset: vscode.Position, endOffset: vscode.Position, editor: vscode.TextEditor, rootNode: CssNode): vscode.Selection | undefined {
+export function prevItemStylesheet(startOffset: vscode.Position, endOffset: vscode.Position, rootNode: CssNode): vscode.Selection | undefined {
 	let currentNode = <CssNode>getNode(rootNode, startOffset, false);
 	if (!currentNode) {
 		currentNode = rootNode;
@@ -61,19 +61,19 @@ export function prevItemStylesheet(startOffset: vscode.Position, endOffset: vsco
 
 	// Full property value is selected, so select the whole property next
 	if (currentNode.type === 'property' && startOffset.isEqual((<Property>currentNode).valueToken.start) && endOffset.isEqual((<Property>currentNode).valueToken.end)) {
-		return getSelectionFromNode(currentNode, editor.document);
+		return getSelectionFromNode(currentNode);
 	}
 
 	// Part of propertyValue is selected, so select the prev word in the propertyValue
 	if (currentNode.type === 'property' && startOffset.isAfterOrEqual((<Property>currentNode).valueToken.start) && endOffset.isBeforeOrEqual((<Property>currentNode).valueToken.end)) {
-		let singlePropertyValue = getSelectionFromProperty(currentNode, editor.document, startOffset, endOffset, false, 'prev');
+		let singlePropertyValue = getSelectionFromProperty(currentNode, startOffset, endOffset, false, 'prev');
 		if (singlePropertyValue) {
 			return singlePropertyValue;
 		}
 	}
 
 	if (currentNode.type === 'property' || !currentNode.firstChild || (currentNode.type === 'rule' && startOffset.isBeforeOrEqual(currentNode.firstChild.start))) {
-		return getSelectionFromNode(currentNode, editor.document);
+		return getSelectionFromNode(currentNode);
 	}
 
 	// Select the child that appears just before the cursor
@@ -83,12 +83,12 @@ export function prevItemStylesheet(startOffset: vscode.Position, endOffset: vsco
 	}
 	prevNode = <CssNode>getDeepestNode(prevNode);
 
-	return getSelectionFromProperty(prevNode, editor.document, startOffset, endOffset, false, 'prev');
+	return getSelectionFromProperty(prevNode, startOffset, endOffset, false, 'prev');
 
 }
 
 
-function getSelectionFromNode(node: Node, document: vscode.TextDocument): vscode.Selection | undefined {
+function getSelectionFromNode(node: Node): vscode.Selection | undefined {
 	if (!node) {
 		return;
 	}
@@ -98,7 +98,7 @@ function getSelectionFromNode(node: Node, document: vscode.TextDocument): vscode
 }
 
 
-function getSelectionFromProperty(node: Node, document: vscode.TextDocument, selectionStart: vscode.Position, selectionEnd: vscode.Position, selectFullValue: boolean, direction: string): vscode.Selection | undefined {
+function getSelectionFromProperty(node: Node, selectionStart: vscode.Position, selectionEnd: vscode.Position, selectFullValue: boolean, direction: string): vscode.Selection | undefined {
 	if (!node || node.type !== 'property') {
 		return;
 	}

extensions/emmet/src/test/cssAbbreviationAction.test.ts

@@ -56,7 +56,7 @@ suite('Tests for Expand Abbreviations (CSS)', () => {
 	teardown(closeAllEditors);
 
 	test('Expand abbreviation (CSS)', () => {
-		return withRandomFileEditor(cssContents, 'css', (editor, doc) => {
+		return withRandomFileEditor(cssContents, 'css', (editor, _) => {
 			editor.selections = [new Selection(3, 1, 3, 6), new Selection(5, 1, 5, 6)];
 			return expandEmmetAbbreviation(null).then(() => {
 				assert.equal(editor.document.getText(), cssContents.replace(/pos:f/g, 'position: fixed;'));
@@ -75,7 +75,7 @@ suite('Tests for Expand Abbreviations (CSS)', () => {
 }
 `;
 
-		return withRandomFileEditor(testContent, 'css', (editor, doc) => {
+		return withRandomFileEditor(testContent, 'css', (editor, _) => {
 			editor.selection = new Selection(3, 4, 3, 4);
 			return expandEmmetAbbreviation(null).then(() => {
 				assert.equal(editor.document.getText(), testContent);
@@ -98,7 +98,7 @@ suite('Tests for Expand Abbreviations (CSS)', () => {
 nav#
 		`;
 
-		return withRandomFileEditor(testContent, 'css', (editor, doc) => {
+		return withRandomFileEditor(testContent, 'css', (editor, _) => {
 			editor.selection = new Selection(5, 4, 5, 4);
 			return expandEmmetAbbreviation(null).then(() => {
 				assert.equal(editor.document.getText(), testContent);
@@ -120,7 +120,7 @@ nav#
 }
 		`;
 
-		return withRandomFileEditor(testContent, 'css', (editor, doc) => {
+		return withRandomFileEditor(testContent, 'css', (editor, _) => {
 			editor.selection = new Selection(2, 10, 2, 10);
 			return expandEmmetAbbreviation(null).then(() => {
 				assert.equal(editor.document.getText(), testContent);
@@ -137,7 +137,7 @@ nav#
 	test('Skip when typing the last property value in single line rules (CSS)', () => {
 		const testContent = `.foo {padding: 10px; margin: a}`;
 
-		return withRandomFileEditor(testContent, 'css', (editor, doc) => {
+		return withRandomFileEditor(testContent, 'css', (editor, _) => {
 			editor.selection = new Selection(0, 30, 0, 30);
 			return expandEmmetAbbreviation(null).then(() => {
 				assert.equal(editor.document.getText(), testContent);
@@ -159,7 +159,7 @@ nav#
 }
 		`;
 
-		return withRandomFileEditor(testContent, 'css', (editor, doc) => {
+		return withRandomFileEditor(testContent, 'css', (editor, _) => {
 			const cancelSrc = new CancellationTokenSource();
 			const completionPromise1 = completionProvider.provideCompletionItems(editor.document, new Position(2, 12), cancelSrc.token, { triggerKind: CompletionTriggerKind.Invoke });
 			const completionPromise2 = completionProvider.provideCompletionItems(editor.document, new Position(2, 14), cancelSrc.token, { triggerKind: CompletionTriggerKind.Invoke });
@@ -198,7 +198,7 @@ nav#
 }
 		`;
 
-		return withRandomFileEditor(testContent, 'css', (editor, doc) => {
+		return withRandomFileEditor(testContent, 'css', (editor, _) => {
 			editor.selection = new Selection(3, 10, 3, 10);
 			return expandEmmetAbbreviation(null).then(() => {
 				assert.equal(editor.document.getText(), testContent);
@@ -220,7 +220,7 @@ nav#
 }
 		`;
 
-		return withRandomFileEditor(testContent, 'css', (editor, doc) => {
+		return withRandomFileEditor(testContent, 'css', (editor, _) => {
 			const cancelSrc = new CancellationTokenSource();
 			const completionPromise1 = completionProvider.provideCompletionItems(editor.document, new Position(3, 12), cancelSrc.token, { triggerKind: CompletionTriggerKind.Invoke });
 			const completionPromise2 = completionProvider.provideCompletionItems(editor.document, new Position(3, 14), cancelSrc.token, { triggerKind: CompletionTriggerKind.Invoke });
@@ -258,7 +258,7 @@ nav#
 }
 		`;
 
-		return withRandomFileEditor(testContent, 'css', (editor, doc) => {
+		return withRandomFileEditor(testContent, 'css', (editor, _) => {
 			editor.selection = new Selection(2, 10, 2, 10);
 			return expandEmmetAbbreviation(null).then(() => {
 				assert.equal(editor.document.getText(), testContent);
@@ -279,7 +279,7 @@ nav#
 }
 		`;
 
-		return withRandomFileEditor(testContent, 'css', (editor, doc) => {
+		return withRandomFileEditor(testContent, 'css', (editor, _) => {
 			const cancelSrc = new CancellationTokenSource();
 			const completionPromise1 = completionProvider.provideCompletionItems(editor.document, new Position(2, 12), cancelSrc.token, { triggerKind: CompletionTriggerKind.Invoke });
 			const completionPromise2 = completionProvider.provideCompletionItems(editor.document, new Position(2, 14), cancelSrc.token, { triggerKind: CompletionTriggerKind.Invoke });
@@ -317,7 +317,7 @@ nav#
 }
 		`;
 
-		return withRandomFileEditor(testContent, 'css', (editor, doc) => {
+		return withRandomFileEditor(testContent, 'css', (editor, _) => {
 			editor.selection = new Selection(2, 2, 2, 2);
 			return expandEmmetAbbreviation(null).then(() => {
 				assert.equal(editor.document.getText(), testContent);
@@ -336,7 +336,7 @@ nav#
 		const abbreviation = 'pos:f';
 		const expandedText = 'position: fixed;';
 
-		return withRandomFileEditor(cssContents, 'css', (editor, doc) => {
+		return withRandomFileEditor(cssContents, 'css', (editor, _) => {
 			editor.selection = new Selection(3, 1, 3, 6);
 			const cancelSrc = new CancellationTokenSource();
 			const completionPromise1 = completionProvider.provideCompletionItems(editor.document, new Position(3, 6), cancelSrc.token, { triggerKind: CompletionTriggerKind.Invoke });
@@ -366,7 +366,7 @@ nav#
 	});
 
 	test('Expand abbreviation (SCSS)', () => {
-		return withRandomFileEditor(scssContents, 'scss', (editor, doc) => {
+		return withRandomFileEditor(scssContents, 'scss', (editor, _) => {
 			editor.selections = [
 				new Selection(3, 4, 3, 4),
 				new Selection(5, 5, 5, 5),
@@ -382,7 +382,7 @@ nav#
 
 	test('Expand abbreviation in completion list (SCSS)', () => {
 
-		return withRandomFileEditor(scssContents, 'scss', (editor, doc) => {
+		return withRandomFileEditor(scssContents, 'scss', (editor, _) => {
 			editor.selection = new Selection(3, 4, 3, 4);
 			const cancelSrc = new CancellationTokenSource();
 			const completionPromise1 = completionProvider.provideCompletionItems(editor.document, new Position(3, 4), cancelSrc.token, { triggerKind: CompletionTriggerKind.Invoke });
@@ -439,7 +439,7 @@ m10
 		}
 		`;
 
-		return withRandomFileEditor(scssContentsNoExpand, 'scss', (editor, doc) => {
+		return withRandomFileEditor(scssContentsNoExpand, 'scss', (editor, _) => {
 			editor.selections = [
 				new Selection(1, 3, 1, 3), // outside rule
 				new Selection(5, 15, 5, 15) // in the value part of property value
@@ -462,7 +462,7 @@ m10
 		}
 		`;
 
-		return withRandomFileEditor(scssContentsNoExpand, 'scss', (editor, doc) => {
+		return withRandomFileEditor(scssContentsNoExpand, 'scss', (editor, _) => {
 			editor.selection = new Selection(1, 3, 1, 3); // outside rule
 			const cancelSrc = new CancellationTokenSource();
 			let completionPromise = completionProvider.provideCompletionItems(editor.document, editor.selection.active, cancelSrc.token, { triggerKind: CompletionTriggerKind.Invoke });
@@ -487,7 +487,7 @@ m10
 });
 
 test('Skip when typing property values when there is a nested rule in the next line (SCSS)', () => {
-	return withRandomFileEditor(scssContents, 'scss', (editor, doc) => {
+	return withRandomFileEditor(scssContents, 'scss', (editor, _) => {
 		editor.selection = new Selection(19, 10, 19, 10);
 		return expandEmmetAbbreviation(null).then(() => {
 			assert.equal(editor.document.getText(), scssContents);

extensions/emmet/src/test/editPointSelectItemBalance.test.ts

@@ -59,7 +59,7 @@ suite('Tests for Next/Previous Select/Edit point and Balance actions', () => {
 `;
 
 	test('Emmet Next/Prev Edit point in html file', function (): any {
-		return withRandomFileEditor(htmlContents, '.html', (editor, doc) => {
+		return withRandomFileEditor(htmlContents, '.html', (editor, _) => {
 			editor.selections = [new Selection(1, 5, 1, 5)];
 
 			let expectedNextEditPoints: [number, number][] = [[4, 16], [6, 8], [10, 2], [20, 0]];
@@ -79,7 +79,7 @@ suite('Tests for Next/Previous Select/Edit point and Balance actions', () => {
 	});
 
 	test('Emmet Select Next/Prev Item in html file', function (): any {
-		return withRandomFileEditor(htmlContents, '.html', (editor, doc) => {
+		return withRandomFileEditor(htmlContents, '.html', (editor, _) => {
 			editor.selections = [new Selection(2, 2, 2, 2)];
 
 			let expectedNextItemPoints: [number, number, number][] = [
@@ -114,7 +114,7 @@ suite('Tests for Next/Previous Select/Edit point and Balance actions', () => {
 	});
 
 	test('Emmet Select Next/Prev item at boundary', function(): any {
-		return withRandomFileEditor(htmlContents, '.html', (editor, doc) => {
+		return withRandomFileEditor(htmlContents, '.html', (editor, _) => {
 			editor.selections = [new Selection(4, 1, 4, 1)];
 
 			fetchSelectItem('next');
@@ -138,7 +138,7 @@ suite('Tests for Next/Previous Select/Edit point and Balance actions', () => {
 	</div>
 </script>
 `;
-		return withRandomFileEditor(templateContents, '.html', (editor, doc) => {
+		return withRandomFileEditor(templateContents, '.html', (editor, _) => {
 			editor.selections = [new Selection(2, 2, 2, 2)];
 
 			let expectedNextItemPoints: [number, number, number][] = [
@@ -167,7 +167,7 @@ suite('Tests for Next/Previous Select/Edit point and Balance actions', () => {
 	});
 
 	test('Emmet Select Next/Prev Item in css file', function (): any {
-		return withRandomFileEditor(cssContents, '.css', (editor, doc) => {
+		return withRandomFileEditor(cssContents, '.css', (editor, _) => {
 			editor.selections = [new Selection(0, 0, 0, 0)];
 
 			let expectedNextItemPoints: [number, number, number][] = [
@@ -198,7 +198,7 @@ suite('Tests for Next/Previous Select/Edit point and Balance actions', () => {
 	});
 
 	test('Emmet Select Next/Prev Item in scss file with nested rules', function (): any {
-		return withRandomFileEditor(scssContents, '.scss', (editor, doc) => {
+		return withRandomFileEditor(scssContents, '.scss', (editor, _) => {
 			editor.selections = [new Selection(0, 0, 0, 0)];
 
 			let expectedNextItemPoints: [number, number, number][] = [
@@ -229,7 +229,7 @@ suite('Tests for Next/Previous Select/Edit point and Balance actions', () => {
 	});
 
 	test('Emmet Balance Out in html file', function (): any {
-		return withRandomFileEditor(htmlContents, 'html', (editor, doc) => {
+		return withRandomFileEditor(htmlContents, 'html', (editor, _) => {
 
 			editor.selections = [new Selection(14, 6, 14, 10)];
 			let expectedBalanceOutRanges: [number, number, number, number][] = [
@@ -266,7 +266,7 @@ suite('Tests for Next/Previous Select/Edit point and Balance actions', () => {
 	});
 
 	test('Emmet Balance In using the same stack as Balance out in html file', function (): any {
-		return withRandomFileEditor(htmlContents, 'html', (editor, doc) => {
+		return withRandomFileEditor(htmlContents, 'html', (editor, _) => {
 
 			editor.selections = [new Selection(15, 6, 15, 10)];
 			let expectedBalanceOutRanges: [number, number, number, number][] = [
@@ -295,7 +295,7 @@ suite('Tests for Next/Previous Select/Edit point and Balance actions', () => {
 	});
 
 	test('Emmet Balance In when selection doesnt span entire node or its inner contents', function (): any {
-		return withRandomFileEditor(htmlContents, 'html', (editor, doc) => {
+		return withRandomFileEditor(htmlContents, 'html', (editor, _) => {
 
 			editor.selection = new Selection(13, 7, 13, 10); // Inside the open tag of <ul class="nav main">
 			balanceIn();
@@ -324,7 +324,7 @@ suite('Tests for Next/Previous Select/Edit point and Balance actions', () => {
 </div>
 </script>`;
 
-		return withRandomFileEditor(htmlTemplate, 'html', (editor, doc) => {
+		return withRandomFileEditor(htmlTemplate, 'html', (editor, _) => {
 
 			editor.selections = [new Selection(5, 24, 5, 24)];
 			let expectedBalanceOutRanges: [number, number, number, number][] = [

extensions/emmet/src/test/incrementDecrement.test.ts

@@ -9,7 +9,7 @@ import { Selection } from 'vscode';
 import { withRandomFileEditor, closeAllEditors } from './testUtils';
 import { incrementDecrement as incrementDecrementImpl } from '../incrementDecrement';
 
-function incrementDecrement(delta): Thenable<boolean> {
+function incrementDecrement(delta: number): Thenable<boolean> {
 	const result = incrementDecrementImpl(delta);
 	assert.ok(result);
 	return result!;

extensions/emmet/src/test/partialParsingStylesheet.test.ts

@@ -15,7 +15,7 @@ suite('Tests for partial parse of Stylesheets', () => {
 	function isValid(doc: vscode.TextDocument, range: vscode.Range, syntax: string): boolean {
 		const rootNode = parsePartialStylesheet(doc, range.end);
 		const currentNode = getNode(rootNode, range.end, true);
-		return isValidLocationForEmmetAbbreviation(doc, rootNode, currentNode, 'css', range.end, range);
+		return isValidLocationForEmmetAbbreviation(doc, rootNode, currentNode, syntax, range.end, range);
 	}
 
 	test('Ignore block comment inside rule', function (): any {
@@ -27,7 +27,7 @@ p {
 	p.
 } p
 `;
-		return withRandomFileEditor(cssContents, '.css', (editor, doc) => {
+		return withRandomFileEditor(cssContents, '.css', (_, doc) => {
 			let rangesForEmmet = [
 				new vscode.Range(3, 18, 3, 19),		// Same line after block comment
 				new vscode.Range(4, 1, 4, 2),		// p after block comment
@@ -62,7 +62,7 @@ dn	{
 	@
 } bg
 `;
-		return withRandomFileEditor(sassContents, '.scss', (editor, doc) => {
+		return withRandomFileEditor(sassContents, '.scss', (_, doc) => {
 			let rangesNotEmmet = [
 				new vscode.Range(1, 0, 1, 4),		// Selector
 				new vscode.Range(2, 3, 2, 7),		// Line commented selector
@@ -91,7 +91,7 @@ comment */
 	p.
 } p
 `;
-		return withRandomFileEditor(cssContents, '.css', (editor, doc) => {
+		return withRandomFileEditor(cssContents, '.css', (_, doc) => {
 			let rangesForEmmet = [
 				new vscode.Range(7, 18, 7, 19),		// Same line after block comment
 				new vscode.Range(8, 1, 8, 2),		// p after block comment
@@ -130,7 +130,7 @@ comment */
 	}
 }}}
 `;
-		return withRandomFileEditor(sassContents, '.scss', (editor, doc) => {
+		return withRandomFileEditor(sassContents, '.scss', (_, doc) => {
 			let rangesForEmmet = [
 				new vscode.Range(2, 1, 2, 2),		// Inside a ruleset before errors
 				new vscode.Range(3, 1, 3, 2),		// Inside a ruleset after no serious error
@@ -155,7 +155,7 @@ comment */
 		const sassContents = `
 .foo{dn}.bar{.boo{dn}dn}.comd{/*{dn*/p{div{dn}} }.foo{.other{dn}} dn
 `;
-		return withRandomFileEditor(sassContents, '.scss', (editor, doc) => {
+		return withRandomFileEditor(sassContents, '.scss', (_, doc) => {
 			let rangesForEmmet = [
 				new vscode.Range(1, 5, 1, 7),		// Inside a ruleset
 				new vscode.Range(1, 18, 1, 20),		// Inside a nested ruleset
@@ -194,7 +194,7 @@ p.#{dn} {
 	dn
 }
 `;
-		return withRandomFileEditor(sassContents, '.scss', (editor, doc) => {
+		return withRandomFileEditor(sassContents, '.scss', (_, doc) => {
 			let rangesForEmmet = [
 				new vscode.Range(2, 1, 2, 4),		// p.3 inside a ruleset whose selector uses interpolation
 				new vscode.Range(4, 1, 4, 3)		// dn inside ruleset after property with variable
@@ -234,7 +234,7 @@ ment */{
 	op.3
 }
 `;
-		return withRandomFileEditor(sassContents, '.scss', (editor, doc) => {
+		return withRandomFileEditor(sassContents, '.scss', (_, doc) => {
 			let rangesForEmmet = [
 				new vscode.Range(2, 14, 2, 21),		// brs6-2p with a block commented line comment ('/* */' overrides '//')
 				new vscode.Range(3, 1, 3, 3),		// dn after a line with combined comments inside a ruleset

extensions/emmet/src/test/tagActions.test.ts

@@ -295,7 +295,7 @@ suite('Tests for Emmet actions on html tags', () => {
 
 	// #region match tag
 	test('match tag with mutliple cursors', () => {
-		return withRandomFileEditor(contents, 'html', (editor, doc) => {
+		return withRandomFileEditor(contents, 'html', (editor, _) => {
 			editor.selections = [
 				new Selection(1, 0, 1, 0), // just before tag starts, i.e before <
 				new Selection(1, 1, 1, 1), // just before tag name starts
@@ -326,7 +326,7 @@ suite('Tests for Emmet actions on html tags', () => {
 		</div>
 	</script>`;
 
-		return withRandomFileEditor(templateScript, 'html', (editor, doc) => {
+		return withRandomFileEditor(templateScript, 'html', (editor, _) => {
 			editor.selections = [
 				new Selection(2, 2, 2, 2), // just before div tag starts, i.e before <
 			];

extensions/emmet/src/test/testUtils.ts

@@ -57,7 +57,7 @@ export function withRandomFileEditor(initialContents: string, fileExtension: str
 			return vscode.window.showTextDocument(doc).then((editor) => {
 				return run(editor, doc).then(_ => {
 					if (doc.isDirty) {
-						return doc.save().then(saved => {
+						return doc.save().then(() => {
 							return deleteFile(file);
 						});
 					} else {

extensions/emmet/src/test/wrapWithAbbreviation.test.ts

@@ -127,7 +127,7 @@ suite('Tests for Wrap with Abbreviations', () => {
 	</ul>
 	`;
 
-		return withRandomFileEditor(contents, 'html', (editor, doc) => {
+		return withRandomFileEditor(contents, 'html', (editor, _) => {
 			editor.selections = [new Selection(2, 0, 2, 0)];
 			const promise = wrapWithAbbreviation({ abbreviation: 'li.hello|c' });
 			if (!promise) {
@@ -155,7 +155,7 @@ suite('Tests for Wrap with Abbreviations', () => {
 	</div>
 	`;
 
-		return withRandomFileEditor(contents, 'html', (editor, doc) => {
+		return withRandomFileEditor(contents, 'html', (editor, _) => {
 			editor.selections = [new Selection(1, 1, 1, 1)];
 			const promise = wrapWithAbbreviation({ abbreviation: 'div' });
 			if (!promise) {
@@ -183,7 +183,7 @@ suite('Tests for Wrap with Abbreviations', () => {
 	</div>
 	`;
 
-		return withRandomFileEditor(contents, 'html', (editor, doc) => {
+		return withRandomFileEditor(contents, 'html', (editor, _) => {
 			editor.selections = [new Selection(3, 1, 3, 1)];
 			const promise = wrapWithAbbreviation({ abbreviation: 'div' });
 			if (!promise) {
@@ -208,7 +208,7 @@ suite('Tests for Wrap with Abbreviations', () => {
 	</ul>
 	`;
 
-		return withRandomFileEditor(contents, 'html', (editor, doc) => {
+		return withRandomFileEditor(contents, 'html', (editor, _) => {
 			editor.selections = [new Selection(1, 2, 1, 2)];
 			const promise = wrapWithAbbreviation({ abbreviation: 'ul>li>a' });
 			if (!promise) {
@@ -237,7 +237,7 @@ suite('Tests for Wrap with Abbreviations', () => {
 		</ul>
 	</ul>
 `;
-		return withRandomFileEditor(contents, 'html', (editor, doc) => {
+		return withRandomFileEditor(contents, 'html', (editor, _) => {
 			editor.selections = [new Selection(2, 2, 3, 33)];
 			const promise = wrapIndividualLinesWithAbbreviation({ abbreviation: 'ul>li.hello$*' });
 			if (!promise) {
@@ -266,7 +266,7 @@ suite('Tests for Wrap with Abbreviations', () => {
 		</ul>
 	</ul>
 `;
-		return withRandomFileEditor(contents, 'html', (editor, doc) => {
+		return withRandomFileEditor(contents, 'html', (editor, _) => {
 			editor.selections = [new Selection(2, 1, 4, 0)];
 			const promise = wrapIndividualLinesWithAbbreviation({ abbreviation: 'ul>li.hello$*' });
 			if (!promise) {
@@ -297,7 +297,7 @@ suite('Tests for Wrap with Abbreviations', () => {
 		</ul>
 	</ul>
 `;
-		return withRandomFileEditor(contents, 'html', (editor, doc) => {
+		return withRandomFileEditor(contents, 'html', (editor, _) => {
 			editor.selections = [new Selection(2, 2, 3, 33)];
 			const promise = wrapIndividualLinesWithAbbreviation({ abbreviation: 'ul>li.hello*|c' });
 			if (!promise) {
@@ -326,7 +326,7 @@ suite('Tests for Wrap with Abbreviations', () => {
 			</ul>
 		</ul>
 	`;
-		return withRandomFileEditor(contents, 'html', (editor, doc) => {
+		return withRandomFileEditor(contents, 'html', (editor, _) => {
 			editor.selections = [new Selection(2, 3, 3, 16)];
 			const promise = wrapIndividualLinesWithAbbreviation({ abbreviation: 'ul>li.hello$*|t' });
 			if (!promise) {
@@ -344,7 +344,7 @@ suite('Tests for Wrap with Abbreviations', () => {
 
 
 function testWrapWithAbbreviation(selections: Selection[], abbreviation: string, expectedContents: string): Thenable<any> {
-	return withRandomFileEditor(htmlContentsForWrapTests, 'html', (editor, doc) => {
+	return withRandomFileEditor(htmlContentsForWrapTests, 'html', (editor, _) => {
 		editor.selections = selections;
 		const promise = wrapWithAbbreviation({ abbreviation });
 		if (!promise) {

extensions/emmet/src/toggleComment.ts

@@ -19,14 +19,6 @@ export function toggleComment(): Thenable<boolean> | undefined {
 		return;
 	}
 	const editor = vscode.window.activeTextEditor;
-	let toggleCommentInternal: (document: vscode.TextDocument, selection: vscode.Selection, rootNode: Node) => vscode.TextEdit[];
-
-	if (isStyleSheet(editor.document.languageId)) {
-		toggleCommentInternal = toggleCommentStylesheet;
-	} else {
-		toggleCommentInternal = toggleCommentHTML;
-	}
-
 	let rootNode = parseDocument(editor.document);
 	if (!rootNode) {
 		return;
@@ -35,7 +27,7 @@ export function toggleComment(): Thenable<boolean> | undefined {
 	return editor.edit(editBuilder => {
 		let allEdits: vscode.TextEdit[][] = [];
 		editor.selections.reverse().forEach(selection => {
-			let edits = toggleCommentInternal(editor.document, selection, rootNode!);
+			let edits = isStyleSheet(editor.document.languageId) ? toggleCommentStylesheet(selection, <Stylesheet>rootNode) : toggleCommentHTML(editor.document, selection, rootNode!);
 			if (edits.length > 0) {
 				allEdits.push(edits);
 			}
@@ -76,7 +68,7 @@ function toggleCommentHTML(document: vscode.TextDocument, selection: vscode.Sele
 		let buffer = new DocumentStreamReader(document, startNode.open.end, new vscode.Range(startNode.open.end, startNode.close.start));
 		let cssRootNode = parseStylesheet(buffer);
 
-		return toggleCommentStylesheet(document, selection, cssRootNode);
+		return toggleCommentStylesheet(selection, cssRootNode);
 	}
 
 	let allNodes: Node[] = getNodesInBetween(startNode, endNode);
@@ -117,7 +109,7 @@ function getRangesToUnCommentHTML(node: Node, document: vscode.TextDocument): vs
 	return unCommentTextEdits;
 }
 
-function toggleCommentStylesheet(document: vscode.TextDocument, selection: vscode.Selection, rootNode: Stylesheet): vscode.TextEdit[] {
+function toggleCommentStylesheet(selection: vscode.Selection, rootNode: Stylesheet): vscode.TextEdit[] {
 	let selectionStart = selection.isReversed ? selection.active : selection.anchor;
 	let selectionEnd = selection.isReversed ? selection.anchor : selection.active;
 

extensions/emmet/src/updateImageSize.ts

@@ -35,7 +35,7 @@ export function updateImageSize() {
 	return Promise.all(allUpdatesPromise).then((updates) => {
 		return editor.edit(builder => {
 			updates.forEach(update => {
-				update!.forEach((textEdit: TextEdit) => {
+				update.forEach((textEdit: TextEdit) => {
 					builder.replace(textEdit.range, textEdit.newText);
 				});
 			});
@@ -46,7 +46,7 @@ export function updateImageSize() {
 /**
  * Updates image size of context tag of HTML model
  */
-function updateImageSizeHTML(editor: TextEditor, position: Position): Promise<TextEdit[] | undefined> {
+function updateImageSizeHTML(editor: TextEditor, position: Position): Promise<TextEdit[]> {
 	const imageNode = getImageHTMLNode(editor, position);
 
 	const src = imageNode && getImageSrcHTML(imageNode);
@@ -64,11 +64,12 @@ function updateImageSizeHTML(editor: TextEditor, position: Position): Promise<Te
 			if (img && getImageSrcHTML(img) === src) {
 				return updateHTMLTag(editor, img, size.width, size.height);
 			}
+			return [];
 		})
 		.catch(err => { console.warn('Error while updating image size:', err); return []; });
 }
 
-function updateImageSizeStyleTag(editor: TextEditor, position: Position): Promise<TextEdit[] | undefined> {
+function updateImageSizeStyleTag(editor: TextEditor, position: Position): Promise<TextEdit[]> {
 	const getPropertyInsiderStyleTag = (editor: TextEditor): Property | null => {
 		const rootNode = parseDocument(editor.document);
 		const currentNode = <HtmlNode>getNode(rootNode, position, true);
@@ -86,14 +87,14 @@ function updateImageSizeStyleTag(editor: TextEditor, position: Position): Promis
 	return updateImageSizeCSS(editor, position, getPropertyInsiderStyleTag);
 }
 
-function updateImageSizeCSSFile(editor: TextEditor, position: Position): Promise<TextEdit[] | undefined> {
+function updateImageSizeCSSFile(editor: TextEditor, position: Position): Promise<TextEdit[]> {
 	return updateImageSizeCSS(editor, position, getImageCSSNode);
 }
 
 /**
  * Updates image size of context rule of stylesheet model
  */
-function updateImageSizeCSS(editor: TextEditor, position: Position, fetchNode: (editor: TextEditor, position: Position) => Property | null): Promise<TextEdit[] | undefined> {
+function updateImageSizeCSS(editor: TextEditor, position: Position, fetchNode: (editor: TextEditor, position: Position) => Property | null): Promise<TextEdit[]> {
 	const node = fetchNode(editor, position);
 	const src = node && getImageSrcCSS(node, position);
 
@@ -103,13 +104,14 @@ function updateImageSizeCSS(editor: TextEditor, position: Position, fetchNode: (
 
 	return locateFile(path.dirname(editor.document.fileName), src)
 		.then(getImageSize)
-		.then((size: any): TextEdit[] | undefined => {
+		.then((size: any): TextEdit[] => {
 			// since this action is asynchronous, we have to ensure that editor wasn’t
 			// changed and user didn’t moved caret outside <img> node
 			const prop = fetchNode(editor, position);
 			if (prop && getImageSrcCSS(prop, position) === src) {
 				return updateCSSNode(editor, prop, size.width, size.height);
 			}
+			return [];
 		})
 		.catch(err => { console.warn('Error while updating image size:', err); return []; });
 }
@@ -261,12 +263,14 @@ function findUrlToken(node: Property, pos: Position): CssToken | undefined {
 				url = token;
 				return false;
 			}
+			return true;
 		});
 
 		if (url) {
 			return url;
 		}
 	}
+	return;
 }
 
 /**

extensions/emmet/src/util.ts

@@ -114,6 +114,7 @@ export function getEmmetMode(language: string, excludedLanguages: string[]): str
 	if (emmetModes.indexOf(language) > -1) {
 		return language;
 	}
+	return;
 }
 
 /**
@@ -259,7 +260,7 @@ export function parsePartialStylesheet(document: vscode.TextDocument, position:
 	try {
 		return parseStylesheet(new DocumentStreamReader(document, startPosition, new vscode.Range(startPosition, endPosition)));
 	} catch (e) {
-
+		return;
 	}
 }
 
@@ -351,7 +352,7 @@ export function getDeepestNode(node: Node | undefined): Node | undefined {
 	return undefined;
 }
 
-export function findNextWord(propertyValue: string, pos: number): [number, number] {
+export function findNextWord(propertyValue: string, pos: number): [number | undefined, number | undefined] {
 
 	let foundSpace = pos === -1;
 	let foundStart = false;
@@ -389,7 +390,7 @@ export function findNextWord(propertyValue: string, pos: number): [number, numbe
 	return [newSelectionStart, newSelectionEnd];
 }
 
-export function findPrevWord(propertyValue: string, pos: number): [number, number] {
+export function findPrevWord(propertyValue: string, pos: number): [number | undefined, number | undefined] {
 
 	let foundSpace = pos === propertyValue.length;
 	let foundStart = false;
@@ -511,12 +512,13 @@ export function getEmmetConfiguration(syntax: string) {
  * Itereates by each child, as well as nested child's children, in their order
  * and invokes `fn` for each. If `fn` function returns `false`, iteration stops
  */
-export function iterateCSSToken(token: CssToken, fn: (x: any) => any) {
+export function iterateCSSToken(token: CssToken, fn: (x: any) => any): boolean {
 	for (let i = 0, il = token.size; i < il; i++) {
 		if (fn(token.item(i)) === false || iterateCSSToken(token.item(i), fn) === false) {
 			return false;
 		}
 	}
+	return true;
 }
 
 /**
@@ -530,7 +532,7 @@ export function getCssPropertyFromRule(rule: Rule, name: string): Property | und
  * Returns css property under caret in given editor or `null` if such node cannot
  * be found
  */
-export function getCssPropertyFromDocument(editor: vscode.TextEditor, position: vscode.Position): Property | null | undefined {
+export function getCssPropertyFromDocument(editor: vscode.TextEditor, position: vscode.Position): Property | null {
 	const rootNode = parseDocument(editor.document);
 	const node = getNode(rootNode, position, true);
 
@@ -548,6 +550,8 @@ export function getCssPropertyFromDocument(editor: vscode.TextEditor, position:
 		const node = getNode(rootNode, position, true);
 		return (node && node.type === 'property') ? <Property>node : null;
 	}
+
+	return null;
 }
 
 
@@ -569,6 +573,7 @@ export function getEmbeddedCssNodeIfAny(document: vscode.TextDocument, currentNo
 			}
 		}
 	}
+	return;
 }
 
 export function isStyleAttribute(currentNode: Node | null, position: vscode.Position): boolean {

extensions/emmet/tsconfig.json

 {
 	"compilerOptions": {
-		"target": "es6",
+		"target": "es2017",
+		"module": "commonjs",
 		"lib": [
-			"es2016"
+			"es6",
+			"es2015.promise"
 		],
-		"module": "commonjs",
 		"outDir": "./out",
+		"noImplicitReturns": true,
 		"noUnusedLocals": true,
+		"noUnusedParameters": true,
 		"strictNullChecks": true
 	},
 	"exclude": [