Add the URL link according to the specific domain name

I am looking for a way to attach additional URL parameters to any links that contain example.com on a webpage.

The current script I have only works if the link does not already have parameters attached to it.

<script>
    document.body.innerHTML = document.body.innerHTML.replace('example.com', 'example.com?utm_day=monday);
</script>

What I really need is a solution that can identify and append any link with example.com, regardless of the existing parameters in the link. For instance, the script should be able to detect

<a href="https://example.com?formID=1234">
and add 

<a href="https://example.com?formID=1234&utm_day=monday">

If you have any suggestions on how to achieve this, please let me know!

javascript

Answer №1

Begin by targeting all the a elements, then proceed to modify those that contain the domain example.com.

let newText = '&utm_day=monday'

document.querySelectorAll('a').forEach(
        link => {
            if (link.href.includes("example.com")) {
                link.href += newText
            }
        }
    )

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