jodit/esm/core/helpers/checker/is-html-from-word.js

Jodit is an awesome and useful wysiwyg editor with filebrowser

/*!
 * Jodit Editor (https://xdsoft.net/jodit/)
 * Released under MIT see LICENSE.txt in the project root for license information.
 * Copyright (c) 2013-2026 Valerii Chupurnov. All rights reserved. https://xdsoft.net
 */
/**
 * @module helpers/checker
 */
/**
 * Detect if string is HTML from MS Word, Excel or LibreOffice/OpenOffice
 */
export function isHtmlFromWord(data) {
    return (data.search(/<meta.*?Microsoft Excel\s[\d].*?>/) !== -1 ||
        data.search(/<meta.*?Microsoft Word\s[\d].*?>/) !== -1 ||
        // `<meta name=ProgId content=Word.Document>` — attribute values are
        // unquoted in the raw Word clipboard fragment
        data.search(/<meta[^>]*?ProgId[^>]*?(Word|Excel)\./i) !== -1 ||
        // LibreOffice/OpenOffice Writer & Calc
        data.search(/<meta[^>]*?(LibreOffice|OpenOffice)/i) !== -1 ||
        // Office namespaces on the root element of the clipboard fragment
        data.search(/urn:schemas-microsoft-com:office:(word|excel)/) !== -1 ||
        // `class=MsoNormal` and friends (unquoted/quoted)
        data.search(/<\w[^>]*\sclass=("|')?Mso/) !== -1 ||
        // the raw Word clipboard uses SINGLE quotes: style='mso-…'
        data.search(/style='[^']*mso-/) !== -1 ||
        (data.search(/style="[^"]*mso-/) !== -1 && data.search(/<font/) !== -1));
}