I'm learning by myself and for now i'm actually stuck.
I want to change the URL of my button depending on which card is selected. The goal is to redirect the user in a config page dedicated to the desired product.
Do I identify them by Ids? Values? Another thing i missed? Do I stock each card's url in the JS file? Or is there a smarter way to do this?
Maybe I should clean my html before getting into this to get something cleaner?
console.log('connected');
const cardBody = document.querySelectorAll('.product_card');
const selectProduct = document.querySelectorAll('.card-body');
const btn = document.querySelector('button');
clickedProduct();
function clickedProduct() {
  for (var i = 0; i < selectProduct.length; i++) {
    selectProduct[i].addEventListener("click", function() {
      (document.querySelector('.active')) ? document.querySelector('.active').classList.remove('active'): '';
      this.classList.add('active');
      btn.classList.remove('disabled');
    });
  };
};body {
  height: 100vh;
  background: #E0EAFC;
  /* fallback for old browsers */
  background: -webkit-linear-gradient(to right, #CFDEF3, #E0EAFC);
  /* Chrome 10-25, Safari 5.1-6 */
  background: linear-gradient(to top, #CFDEF3 100%, #E0EAFC 0%);
  /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
}
.container-big {
  height: 100vh;
  width: auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.container {
  margin-bottom: 0.5vh;
}
.card {
  border-radius: 1.2vh;
}
.row,
.col-sm-6 {
  margin: inherit;
  padding: inherit;
}
.col-left {
  padding-left: 15px;
  padding-right: 7.5px;
}
.col-right {
  padding-right: 15px;
  padding-left: 7.5px;
}
.col-top {
  padding-top: 15px;
  padding-bottom: 7.5px;
}
.col-bot {
  padding-bottom: 15px;
  padding-top: 7.5px;
}
.product_card:hover {
  border: 1px solid #007bff;
}
.card-body:hover {
  color: #007bff;
}
.active {
  border: 1px solid #007bff;
  color: #007bff;
  border-radius: 1.2vh;
  ;
}
.btn-config {
  align-self: flex-end;
  margin-right: 15px;
  margin-bottom: 15px;
}
ul li {
  list-style: none;
}<!DOCTYPE html>
<html lang="en">
<head>
  <!-- Required meta tags -->
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
  <!--- Font Awesome CDN -->
  <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.14.0/css/all.css" integrity="sha384-HzLeBuhoNPvSl5KYnjx0BT+WB0QEEqLprO+NBkkk5gbc67FTaL7XIGa2w1L0Xbgc" crossorigin="anonymous">
  <!--- CSS GG ICONS -->
  <link href='https://css.gg/css' rel='stylesheet'>
  <!-- Bootstrap CSS -->
  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css" integrity="sha384-JcKb8q3iqJ61gNV9KGb8thSsNjpSL0n8PARn9HuZOnIxN0hoP+VmmDGMN5t9UJ0Z" crossorigin="anonymous">
  <!-- CSS -->
  <link rel="stylesheet" type="text/css" href="css/product.css">
  <!-- Titre -->
  <title>Choose a product</title>
</head>
<body>
  <div class="container-big">
    <div class="container">
      <div class="card card-box">
        <div class="card-header">Select a product</div>
        <div class="row">
          <div class="col-sm-6 col-left col-top">
            <div class="card product_card">
              <div value="p1" class="card-body">
                <h5 class="card-title">Product 1</h5>
                <p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
              </div>
            </div>
          </div>
          <div class="col-sm-6 col-right col-top">
            <div class="card product_card">
              <div value="p2" class="card-body">
                <h5 class="card-title">Product 2</h5>
                <p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
              </div>
            </div>
          </div>
        </div>
        <div class="row">
          <div class="col-sm-6 col-left col-bot">
            <div class="card product_card">
              <div value="p3" class="card-body">
                <h5 class="card-title">Product 3</h5>
                <p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
              </div>
            </div>
          </div>
          <div class="col-sm-6 col-right col-bot">
            <div class="card product_card">
              <div value="p4" class="card-body">
                <h5 class="card-title">Product 4</h5>
                <p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
              </div>
            </div>
          </div>
        </div>
        <div class="btn-config" class="d-inline-block" data-toggle="popover" data-placement="left" data-content="testgsdfzefz" data-trigger="hover">
          <button class="btn btn-outline-primary disabled" style="pointer-events: none;">
            <a href="DYNAMIC-CHANGE">Config</a>
        </button>
        </div>
      </div>
    </div>
  </div>
  <!-- Optional JavaScript -->
  <script type="text/javascript" src="js/sproduct.js"></script>
  <!-- jQuery first, then Popper.js, then Bootstrap JS -->
  <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
</body>
</html> 
    