JSFiddle - React, Tailwind, and code Playground

HTML

<div id="results"></div>

JavaScript

$(function () {
    var markup = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"               "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> \
        <html xmlns="http://www.w3.org/1999/xhtml"> \
        <head> \
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />   \
        <title>titleValue</title> \
        <meta name="description" content="It is a good way to learn science." /> \
        <meta name="keywords" content="Symfony2,Redis,PHP" /> \
        <meta name="author" content="CSDN.NET" /> \
        <meta name="Copyright" content="CSDN.NET" /> \
        </head> \
        <body> \
        .......................... \
        </body> \
        </html>';

    var parsed = $(markup);
    
    var description = parsed.filter("meta[name='description']").attr('content');
    
    $('#results').text(description);
});