How to Bind Remote Data to Dropdownlist using JavaScript | CodeLSC

How to Bind Remote Data to Dropdownlist using JavaScript | CodeLSC

 

Implementing a Dropdownlist with Remote Data using jQuery AJAX

Dropdownlists are a common UI element used in web applications to allow users to select options from a list. In some cases, we may need to populate a dropdownlist with data retrieved from a remote data source. This tutorial will show you how to implement a dropdownlist with remote data using JavaScript and jQuery AJAX.

Requirements:

  • jQuery library (version 3.6.0 or above)
  • A remote data source in JSON format (for this tutorial, we will be using the JSONPlaceholder API)

 

HTML:

The HTML code for our dropdownlist is very simple. We have a select element with an id of "postsDropdown" and one default option with the value "null".

      
  
        <select id="postsDropdown">
          <option class="e-popup" value="null">Select a Value</option>
        </select>

 

JavaScript:

The JavaScript code is responsible for retrieving data from the remote data source and binding it to the dropdownlist. We start by using jQuery to select the dropdownlist element and store it in a variable called "dropdown". Then, we use jQuery AJAX to retrieve data from the JSONPlaceholder API. We specify the URL of the API endpoint and the data type as JSON. We also provide a success function that is called when the data is successfully retrieved.

In the success function, we loop through the data using jQuery's $.each() method. For each post in the data, we create a new option element using jQuery and set its value to the post's ID and its text to the post's title. We then append this option to the dropdownlist using the append() method.

  
    <script>
      const dropdown = $('#postsDropdown');
      $.ajax({
        url: 'https://jsonplaceholder.typicode.com/posts',
        type: 'GET',
        dataType: 'json',
        success: function (data) {
          $.each(data, function (key, post) {
            dropdown.append(
              $('<option class="e-popup"></option>')
                .val(post.id)
                .html(post.title)
            );
          });
        },
      });
    </script>

 

Conclusion:

In this tutorial, we have learned how to bind remote data to a dropdownlist using JavaScript and jQuery AJAX. We have also seen how to loop through the data and create option elements dynamically using jQuery. With this knowledge, you can now implement dropdownlists with remote data in your web applications.



Follow us on social media for more coding tips and updates:

© 2023 CodeLSC. All rights reserved.

Comments

Post a Comment