You have a select element, and you need to “select” one of its options based on one of its values. Without jQuery if possible. site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. This is the simple yet efficient script to get the value of the selected option and use in your coding. Here in this example, when a user selects country in first select field, jQuery on change event is called upon to list out it’s relevant cities in second select field simultaneously. When the user-selected value is 2 (2 is the value of sad we can see in the HTML) then sad will select and a text box will come. Now an alert is displayed whenever an option is selected from the drop-down. I’ve researched a lot and get to the following working code: The above code works for a column with no dropdown box. Topic: JavaScript / jQuery Prev|Next. But the script finds the change event of the multiple select boxes and gives the value in an array format. How can I know if 3D aperiodic systems are not interacting with each other using Quantum ESPRESSO? This example will demostrate you how get data attribute values like data-id, data-text or any other data attribute using jquery data() attribute method from selected html elements. The below-given script is the same script as we have using to get the single select box option value. 1. jQuery The idea is to bind the change event handler to the select box using.change (handler) method. var selectedVal = $("#myselect option:selected").val(); You can bind the input event to an input text box using on() method to detect any change in it. Quick note: you'll need to make sure to include the jQuery library somewhere above this code. In the else part we write when the value is not equal to 2 then the text box should be hidden. However, multiple select checkboxes allow selecting multiple checkboxes … We will take some examples using the val method such as you can get selected box value using on jquery change. Problem is that when I got data from database and set it in select box so onchange property is not applied for given value. 8 years ago. Why is it so hard to build crewed rockets/spacecraft able to reach escape velocity? Ashish. How to Detect Change in a Text Input Box in jQuery. The jQuery Change method occurs when the value of the element changes. For the single select box, you can select the only single option and be using the script you can get that selected single option value. However, this procedure (using 'input' as selector) may not produce a desired result if we have more than one input element. $ (" #dropdownList ").val (); The second one is the text value of the select element. Since you changing the value manually. jQuery provides two methods to get the value of the selected option from the select box. In this example, we are going to help to get the value of the selected option in the select box using jQuery. In this post, we will see how to get selected value of dropdown in JavaScript and jQuery onchange event. For this, you have to use the multiple select boxes by using the attribute multiple in the HTML