jQuery Check Is Selected - Javascript

Sometimes in web development, we need to check if a user has selected a particular option from a dropdown list. In this tutorial, we'll be using jQuery to achieve this.

HTML Code

Here's a simple HTML code for a dropdown list with some options:

<select id="mySelect">
  <option value="">Please select an option</option>
  <option value="option1">Option 1</option>
  <option value="option2">Option 2</option>
</select>

jQuery Code

To check if an option has been selected from this dropdown list, we can use the following jQuery code:

$(document).ready(function(){
  $("#mySelect").change(function(){
    var selectedOption = $(this).children("option:selected").val();
    if(selectedOption != ''){
      // Do something when an option is selected
      console.log(selectedOption + ' is selected');
    }
  });
});

• We start with $(document).ready() to make sure the DOM is fully loaded before executing the code inside it.
• We identify the dropdown list by its id mySelect using jQuery's selector.
• We attach an event listener to the dropdown list using change() method. This listener will trigger a function whenever the user selects a different option.
• Inside the event listener, we get the value of the selected option using children("option:selected").val().
• We check if the selected option is not an empty string. If it's not empty, we execute some code (in this case, we log a message to the console).

Conclusion

And that's it! This is a simple way to check if an option has been selected from a dropdown list using jQuery. You can modify the code inside the if statement to do whatever you want when an option is selected.