Update HTML Elements Dynamically with jQuery Based on User Input

by vigneshchennai74 Updated: Mar 21, 2023

Guide Kit

The code "Update HTML Elements Dynamically with jQuery Based on User Input" is a JavaScript program that uses the jQuery library to update HTML elements based on user input. Specifically, it updates a box's background color and text content in response to the user entering a number into an input field.

When the user types a number into the #textBox input field, the jQuery code listens for the input event and then updates the background color of the .box1 element based on the value entered. The background color is red if the number is less than or equal to 20. The background color is orange if the number is between 21 and 50. If the number exceeds 50, the background color is set to steelblue. Additionally, the h3 element inside the .box1 element is updated with the number entered by the user.

This code helps make the user interface more interactive by providing instant feedback based on their input. Instead of submitting a form or reloading the page to see the changes, the user can see the effect of their input immediately. This can improve the user experience and make the website more engaging.

Preview of the output that you will get on running this code from your IDE

Code

The jQuery library is the primary tool used for updating the HTML elements dynamically based on user input.

Change element dinamically with jQuery

JavaScriptLines of Code : 35License : Strong Copyleft (CC BY-SA 4.0)

$('#textBox').on("input", function(){ ... });

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
    <form name="myform">
      Your number:
      <input type="number" name="inputbox" id='textBox' value="" />
      <input type="button" name="button" class="member" value="Click me!" />
      <div class='box1' style='border:1px solid #333333;margin-top:15px;width:33.33%;height:50%;padding-left:15px;padding-right:15px;'>
        <h3>
          0
        </h3>
        <p>
          Valor
        </p>
      </div>
    </form>
    <script>
      $(function() {

        $('#textBox').on("input", function() {
        
        var answer = $("#textBox").val();
        
          if (answer <= 20) {
            $('.box1').css('background-color', 'red').find('h3').html(answer);
          } else if (answer <= 50) {
            $('.box1').css('background-color', 'orange').find('h3').html(answer);
          } else {
            $('.box1').css('background-color', 'steelblue').find('h3').html(answer);
          }
        });

      });

    </script>

Instructions

Download and install VS Code on your desktop.
Open VS Code and create a new file in the editor.
Copy the code snippet that you want to run, using the "Copy" button or by selecting the text and using the copy command (Ctrl+C on Windows/Linux or Cmd+C on Mac).
Paste the code into your file in VS Code, and save the file with a meaningful name and the appropriate file extension (.html for HTML, .js for JavaScript, etc.).
To run the code, open the file in VS Code and click the "Run" button in the top menu, or use the keyboard shortcut Ctrl+Alt+N (on Windows and Linux) or Cmd+Alt+N (on Mac). The output of your code will appear in the VS Code output console.

I hope you found this useful. I have added the version information in the following sections.

I found this code snippet by searching for Change element dinamically with jQuery in kandi. You can try any such use case!

Environment Tested

Tested this solution in the following versions. Be mindful of changes when working with other versions.

Visual Studio Code Version 1.76.0

This JavaScript program uses the jQuery library to update HTML elements based on user input. This process also facilities an easy-to-use, hassle-free method to create a hands-on working version of code which would help us to do updates in JQuery..

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Update HTML Elements Dynamically with jQuery Based on User Input

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