Change the selected value of a drop-down list with jQuery

Change the selected value of a drop-down list with jQuery: If you want to change the selected value of a dropdown list using jQuery, there are several simple ways to do it. You can select the item by its text, value, or index, depending on what your requirement is. Below, we will look at different jQuery methods so you can choose the one that fits your situation the best.

Dynamic Select Option Dropdown In Jquery With Examples

We were able to fix the dynamic select option dropdown In the Jquery problem by looking at several different examples.

var temp = "myValue";
// Create New Option
var newOption = $('<option>');
newOption.attr('value', temp).text(temp);
// Append that to the DropDownList
$('#dptcentres_edit').append(newOption);
// Select the Option
$("#dptcentres_edit > [value=" + temp + "]").attr("selected", "true");

These solutions seem to assume that each item in your drop-down lists has a val() value relating to its position in the drop-down list. Things are a little more complicated if this isn’t the case. To read the selected index of a drop-down list, you would use this:

$("#dropDownList").prop("selectedIndex");

To set the selected index of a drop-down list, you would use this:

$("#dropDownList").prop("selectedIndex", 1);

Add items in the dropdown list dynamically using jQuery

To add a dropdown list dynamically, you would need to create the HTML <select> element, its label, and optionally a <br> tag. In pure JavaScript, you can use the document. createElement() method to programmatically create a dropdown list. Then you can call the Node’s appendChild() method or jQuery’s.

How to create a dynamic select option in jQuery?

<select class="form-control"><br>
 <option selected="selected">orange</option><br> 
<option>white</option><br> <option>purple</option> <br>
</select> $(". js-example-tags"). select2({ tags: true });

The prop() Method:

The .prop() method is used to retrieve the property value for the first element only in the matched set. 

The attr() Method:

The .attr() method is used to get the attribute value for the first element only in the matched set. Use the .each() or .map() looping methods for getting the value for each element individually. 

The val() Method:

The .val() method is mainly used to get the values of form elements such as input, select, and textarea. It will return undefined if it is called on an empty set.

Dropdown list with <select> and <option> tag:

The select and option tags are used to create drop-down menus. They allow the user to select single or multiple choices from a list of options. All the choices are not shown on the screen, but they are visible when they pull the drop-down list.

They are used to save space as only one item of the list is displayed.
For creating Pull down lists, the tag is used instead of the tag. The paired tag starts with the opening tag and ends with the closing tag . This tag has to be used with the tag.

Syntax:

<strong><select</strong> name = "select_list_name" size ="n" multiple<strong>></strong>  <br><strong><option</strong> value ="choice-name 1" selected<strong>></strong> Text Label-1 <strong></option></strong>  <br><strong><option</strong> value ="choice-name 2" selected<strong>></strong> Text Label-2 <strong></option></strong>  <br>.......<br>.......<br><strong></select></strong>