[FIXED] How to change image when I select dropdown in Bootstrap

Issue

I have a dropdown list in Bootstrap. How to change img src (<img src="img/website_building.jpg"...) when selecting items in the dropdown list. Is this possible?

<tr>
  <td class="bold text-primary">
    <div class="dropdown show">
      <a class="btn btn-secondary dropdown-toggle" href="#" role="button" id="dropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
        Test
      </a>

      <div class="dropdown-menu" aria-labelledby="dropdownMenuLink">
        <a class="dropdown-item" href="#">1</a>
        <a class="dropdown-item" href="#">2</a>
        <a class="dropdown-item" href="#">3</a>
      </div>
    </div>
  </td>
  <td class="center-image icon">
    <img src="img/website_building.jpg" rel="popover" class="highlight zoom img-thumbnail" width="300" alt="">
  </td>
  </td>
</tr>

Solution

The simplest way is just to create event listeners for the dropdown items and change the URL based on a dictionary or some other source.

For instance, you can create event listeners for the click event as such:

$(".dropdown-item").click(function () {
  console.log('I clicked', this.innerHTML)
});

The next step is to come up with a way to map each dropdown item to the desired image URL. There are a number of ways you can do that, like using dictionaries in which ids of the items are keys and URLs are values. Below I show you an example using data attributes.

$(".dropdown-item").click(function() {
  const imageURL = $(this).data("image");
  $("img").attr("src", imageURL);
});

<link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css">
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.5.3/js/bootstrap.min.js"></script>

Select any item in the dropdown below to change the image.

<table>
  <tr>
    <td class="bold text-primary">

      <div class="dropdown show">
        <a class="btn btn-secondary dropdown-toggle" href="#" role="button" id="dropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
    Test
  </a>

        <div class="dropdown-menu" aria-labelledby="dropdownMenuLink">
          <a class="dropdown-item" href="#" data-image="http://bc.id.au/images/it_flag.gif">1</a>
          <a class="dropdown-item" href="#" data-image="http://bc.id.au/images/fr_flag.gif">2</a>
          <a class="dropdown-item" href="#" data-image="http://bc.id.au/images/es_flag.gif">3</a>
        </div>
      </div>

    </td>
    <td class="center-image icon">
      <img src="http://bc.id.au/images/de_flag.gif" rel="popover" class="highlight zoom img-thumbnail" width="300" alt="">
    </td>
    </td>
  </tr>
</table>

Answered By - acdcjunior

Answer Checked By - Mary Flores (PHPFixing Volunteer)