vscode/extensions/markdown-language-features/src/util/file.ts

/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/

import * as vscode from 'vscode';

export function isMarkdownFile(document: vscode.TextDocument) {
	return document.languageId === 'markdown';
}