How to redirect all download link to a single download page on wordpress

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Javascript

WordPress

I saw a feature on thewpclub. net, I also want to implement it on my Wordpress blog. when you click on any download link, it will first redirect you to thewpclub. net/download and a 15 seconds countdown will happen there before the actual download link appear.

What I have tried:

I saw a code on help.gulshankumar. net/forum, I paste the code on my blog footer, but it ain't working. Please help me correct any error in the code and guide me on how to place and implement it on my blog.

See the code below.

The first script will select any links with class download-wait and change its link from “https://example.com/file.zip” to “https://yoursite.com/download?https%example.com%file.zip

const downloadLinks = document.querySelectorAll('.download-wait');
    downloadLinks.forEach(link => {
    const linkToFile = link.getAttribute('hrefs');
    const linkToFileEdited = linkToFile
        .replace('https://', 'https/')
        .replace(new RegExp('%', 'g'), '/');

    link.setAttribute('href', `${window.location.origin}/download/?${linkToFileEdited}`);
    });

after the user is redirected to the download page the second script will keep the user wait for 15 sec then decode the link and redirect the user to the external link.

<p style="font-size:16px;">Please wait, starting download in <strong><span id="countdown">15</span> seconds</strong></p>



<pre lang="Javascript">const query = window.location.search;
const link = query.slice(1);

const newLink = link
    .replace(new RegExp('%', 'g'), '/')
    .replace('https/', 'https://');

 // Total seconds to wait
 var seconds = 15;
 
 function countdown() {
     seconds = seconds - 1;
     if (seconds < 0) {
         // Download link
         window.location = newLink;
     } else {
         // Update remaining seconds
         document.getElementById("countdown").innerHTML = seconds;
         // Countdown wait time is 1 second
         setTimeout("countdown()", 1000);
     }
 }
 
 // Run countdown function
 countdown();