Find exact match of letters in a browser's address field and use the match in a IF condition

I need to identify exactly some country letters in a browser address field and use them in an IF condition but I'm not sure that the way I'm identifying the letters in the link is correct using .include('dk').

So far, I created a variable:

const findUrl = "http://www.example.com/dk"; //window.location.href
//const result = /\.com\/(\w{2})\//.exec(findUrl);

I use a forEach to loop through an array of objects where I have a lot of IF's which contain the letters found.

groupData.forEach(function (group) {

       if(findUrl.includes('dk') && group.data[2].id === 'DK') {
        polygonTemplate.tooltipHTML = '<b>{countryDK}</b><strong><p style="color:#a8b621;">{linkNameDK}</p></strong>';
        polygonTemplate.events.on("hit", function (ev) {
        chart.closeAllPopups();
        
        let popupContent = ev.target.dataItem.dataContext.linkDK.map((url, urlIndex) =>
          `${(url.length) ? `<a href="${encodeURI(url)}">${ev.target.dataItem.dataContext.linkNameDK[urlIndex]}</a><br>` : ''} `
        ).join('');
        });
    }

How can I write better findUrl.includes('dk') in order to find an exact match of letters in a link?