Add a class when the text Value of two html elements are the same. This particular example is comparing the text of the Title Tag and and List Items in an Unordered list

JavaScript 5

//textcompare.js

$('ul.main-nav li').each(function () {
        var title = $('title').text();
        var mainlink = $(this).text();
        if (title == mainlink) {
            $(this).addClass('active');
        }
    });