Populate dropdown using javascript from database Jul 23, 2025 · Approach 1: Populate Dropdown List with Array Values using foreach Loop You can use a foreach loop to iterate over an array of elements and populate the dropdown list with its values. For instance, the user selects "blue" as their favorite color from the select box. In this application I will create and scaffold a model to work with the database and retrieve data from SQL Server database. The 2nd dropdown will be empty on the first instance. Both of the fields are part of the same form. Nov 21, 2020 · The records from the Database will be fetched from Database Table using ADO. NET. This article shows you to create a dropdown combo box dynamically using jQuery, HTML, and JSON. For that many beginners get into trouble trying to fill the DropDownList from database table. For example: I have Model call `class Books` which has name, publication_date, author, type. js Express Application with MySQL Database. Net DropDownList items (options) will be populated by fetching data from database using Entity Framework in JSON format by calling Controller from View using jQuery AJAX in ASP. It creates a dynamic dropdown with Ajax and PHP. Oct 6, 2021 · I'm new to HTML and javascript. Apr 20, 2022 · This article shows you to create a drop-down list dynamically using JavaScript, HTML, and JSON. Attach change event to it and get the selected option. When building web applications, a common requirement is to populate dropdown options dynamically based on data retrieved from a database. Jul 23, 2025 · The dropdown list is a toggleable menu that allows to user to choose one option from multiple. In this blog you will learn how to populate dropdown list from Database In Classic ASP (Vbscript). Jan 17, 2020 · In this part, we are going to learn how to bind the dropdown list in ASP. json file with some info and wht I want to do is to populate my dropdown with some of the info and when I select an option from the dropdown, I want to display more info from the . Aug 1, 2021 · I have a . Nov 7, 2017 · explained with an example, how to dynamically populate DropDownList i. Dec 27, 2015 · A pure Javascript solution: this snippet shows how to populate a dropdown select from JSON data (using id as value and name as text. map is used in place of a for loop. see below code I didn't see any error. We'll use jQuery AJAX to fetch data from the server and populate dependent dropdown lists based on user selections. The controller will be responsible for selecting a view to be displayed to the user and In this article I will explain how to populate a dropdown list from database values in ASP. Currently I am filling the dropdown using a hardcoded object. Dec 7, 2024 · Dynamic Values in Select Dropdowns: A How-To Guide Creating dynamic select dropdowns in web applications is a fundamental skill for any JavaScript developer. Jun 29, 2012 · I have a text file which I am reading and storing the data in a javascript array, it's a list of cuisines. The controller will be responsible for selecting a view to be displayed to the user and Oct 31, 2017 · The ASP. Jul 21, 2015 · First log your data like console. Aug 15, 2019 · The cascading dropdown pattern is typically used to help users to filter data. Image below shows the dropdownlist which is loaded on page load. php" runs a query against a database, and returns the result in an HTML table: Apr 11, 2023 · Overview To attain the options in the Dropdown list without disturbing the frontend of the web page can be with the help of array. Populating list box with data from student table by using jQuery → HTML 5 and Datalist Datalist is added in HTML 5 . May 19, 2022 · I'm trying to populate my select dropdown options with values that come from an API call as soon as the page loads. My Controller: public IActionResult Index(bool ShowMessage = false, string Message… Django Dropdown populate from database Asked 14 years, 6 months ago Modified 4 years, 6 months ago Viewed 54k times Apr 17, 2014 · How can I create a dynamic drop down list for my html page but use values from a database to populate the available drop down items in one box based on the value of another? Feb 7, 2025 · Conclusion The HTML Select add() method provides a powerful and flexible way to dynamically add options to a <select> dropdown using JavaScript. But I want to replace this hard coded object with d Apr 29, 2014 · I have a dropdown list and i am trying to populate my dorpdown list with the data from the database, for this i am using mvc so how do i write a method in controller and how do i write the jquery for Oct 19, 2016 · In asp. This guide will walk you through best May 2, 2009 · jQuery: Best practice to populate drop down? Asked 16 years, 6 months ago Modified 3 years, 10 months ago Viewed 408k times Nov 14, 2021 · One of the field is a dropdownlist. NET6. Jan 8, 2019 · I have an array of objects that I'd like to use to populate a Select option dropdown, but these elements do not already exist and must be created from scratch. Aug 17, 2012 · In this tutorial we fetch data from database and covert it to xml format and populate it into dropdown with the help of jQuery/Javacript. 0:07 - Tables 0:55 - Database configuration 1:35 - Create index. In this tutorial, you'll learn two simple and effective ways to populate an HTML <select> dropdown list using JSON data and JavaScript. I have sample data: javascript Jun 26, 2020 · Hi, In the database, I have 2 columns ‘id’ and ‘city_name’ in ‘city_name’ I have 50 records I what all the city_name should populate in dropdown please suggest me with some solution The dropdown values Canadacity and Canadacity2 is populating from the array in en_us. Like dropdown list users can select options from available choice and in addition to that they can add their own text. When you select Feb 5, 2015 · 2 I have a form that has a dropdown selection menu that loads invoice ids from my database. A dropdown list is a toggleable menu that allows the user to choose May 14, 2015 · My requirement is that for a selection in a 'meal' drop down list, a second drop down list 'category' should get dynamically populated with values related to the selection in first drop down list. In the Dynamic Dependent dropdown box feature, when we have select first value from first select box, then second or child select box will be filled Sep 20, 2017 · A common requirement when developing forms on the web is populating a dropdown list using data from a web service or external file. You probably need to format the response though. Sep 22, 2009 · Let me be more clear. I have another `class checkout` inheriting `Books`. I’m using Adobe Acrobat Standard on Windows 10. May 7, 2015 · Up until this point everything works - When I choose a value in my Province DropDown the javascript event fires and the Controller action does return the select list values to the Cities DropDown, the problem however is that the data (of the formatof the data) that the Action returns is incorrect. Populate form with data from different sources with JavaScript In this article, you can find examples of how to use JavaScript to prefill a form from different sources. e. In my database is a column "invoiceidcopy" which contains a value (s) that shows as a selection (s) for my drop down menu. A set of branch names and their branch ids. The first dropdown is populated with the broadest options, and subsequent dropdowns are populated with options that relate to the selected value of the preceding dropdown. abc" refers to the first value of the array. We will also be using the jQuery framework to make the AJAX call and to detect the select list change. Service class to connect to the database can be implemented using Java and Spring Boot. I am setting up a user application using ASP. But using jQuery ajax in populating a dropdown is easy and fast. Basically its a table that consist of users and their credentials. I want to use the array to fill up a drop down select box. Oct 31, 2017 · I want to display a dropdown list in Airline tab. Nov 15, 2022 · As a web developer (and as a software developer in general), it is of utmost importance that you learn how to work with Application Programming Interfaces (APIs). For that I am using Viewbag in controller to load the data in dropdown list. NET MVC application. I’ll show you how to create a cascading SELECT dropdown list using JSON data and jQuery. Oct 18, 2023 · This tutorial will walk through an example of creating a dependent dropdown list using AJAX PHP MySQL. PHP code to get data: if ($dat=="driver") { Jun 10, 2022 · Populate drop-down from database in Javascript [duplicate] Asked 2 years, 8 months ago Modified 2 years, 8 months ago Viewed 570 times The page on the server called by the JavaScript above is a PHP file called "getcustomer. Dec 13, 2024 · In this tutorial, you’ll learn how to create dynamic, database-driven multi-select drop down menus using PHP, JavaScript, and MySQL. Feb 16, 2021 · The records from the Database will be populated into Model class objects and then the Model will be used to populate the DropDownList using the new ASP. Net Tag Helpers in ASP. const This article will demonstrate how to bind the values to Razor DropDownList in various ways using ASP. Enhance user experience by populating select elements with dynamic data. So far I've been able to populate the dropdown OR automatically select a value. The code creates a new Option object for each item in the JSON data and appends it to the select element with appendChild(). Aug 19, 2024 · Discover how to dynamically populate dropdowns from a database with JavaScript! Uncover secrets that will elevate your web application to new heights. i cannot call the asp-items inside my javascript code. 0. The dropdowns are populated asynchronously so the dependent dropdowns are emptied before AJAX request. How can i populate the dropdownlist value in this dynamically generated field. Here we will see multiple examples to dynamically populate select options in JavaScript. const This is Node. An MVC application consists of model, view and controller. NET MVC. We’ll start with a simple setup, then populate the dropdown with data, and finally, handle changes using React’s hooks. js tutorial on dynamic dependent select box from MySQL database and under this tutorial, you will step by step learn How to create dynamic dependent country state city select box in Node. Can someone help me on how to fetch the data from the URL to populate the options list? PS: I am familiar with Fetch API for fetching the data Jan 30, 2021 · The following is a module with functions which demonstrates how to add and populate a dropdown select list with an array of items using vanilla JavaScript. So we’ll use a file “getter. This video demonstrates how to populate dropdown using jQuery from the database. Source code zip file is provided and is free to download. May 5, 2015 · Upon selection, a dropdown will be populated from database, and a default value of that dropdown will be automatically selected. net mvc by using @Html. How to setup FORM, VIEW and HTML, so that from the dropdown select `name` would like to populate all the fields and also then add other Oct 5, 2018 · The records from the database will be fetched using Stored Procedure and populated into a Generic List collection of Model class objects and then will be saved into a ViewBag object. So in this article I will show you how to populate a dropdown from database using jQuery ajax. . NET MVC dropdownlist With Dynamic Values that comes from controller's action. I'm trying to create a dynamic Dropdown system where i have The Country DropDown and the cities DropDown, and i want to fetch my data from a const that has multiple arrays in it, here's an example of the const i have: Nov 6, 2017 · explained with an example, how to dynamically populate DropDownList i. In this tutorial, we will explore how to dynamically bind dropdown lists in JavaScript, enabling you to populate the dropdown with data from various sources. HTML Dropdown form design The HTML form uses the radio input option to get the value selected. Dec 27, 2023 · Learn how to create a dropdown menu using the onchange event in JavaScript for dynamic and interactive web applications. I am trying to populate dropdown list with my data file and do a pie chart. Instantly, the text field below is populated with the sentence "You Adding options to listbox by collecting records from database table using jQuery and JSON string Sep 18, 2023 · Hi. Jan 28, 2022 · Using the above CSS and JavaScript in an HTML dropdown form, a search bar with search functionality can be implemented easily. So far, CSS Tricks (Dynamic-Dropdowns) this is the best and most Aug 13, 2015 · I'm working on a MySQL update form and struggle to make a drop down selectbox that will autofill the rest of the form with data from mysql. DropDownListFor Html Helper method. deptno }} in HTML form field. so by considering above requirement i have written this article for beginners, students and anyone who wants to learn how to fill a DropDownList from a database table. NET 4. Sep 28, 2013 · These lines will initialize Hiddenfield value with the sorted list (Assume that list contains the key value pairs in sorted order) which is then serialized using JSON serializer Aug 3, 2021 · Also when I type any character in the search box it should filter the options. HTML Select element on Button click from JSON Array using JavaScript. Free example code download included. Currently, the options are only generated once you touch and deselect the select field. Aug 24, 2013 · I have this JavaScript+HTML to populate a dropdown menu but it is not working, am i doing anything wrong? Note I want the drop down menu to be filled on page Load &lt;!DOCTYPE html&gt; &lt; Mar 20, 2021 · When it's changed, pass that value to some PHP endpoint using Ajax and query the database. I'm trying to prefill my form based on the value of the invoice selected from the drop down menu. We'll cover how to populate a drop down menu with countries Here in this post I am sharing an example on how to extract JSON data from an external file and bind or populate the data to a SELECT element using jQuery. DropdownlistFor properties we can easily implement dropdownlist based on the values from database. I have working code using the Aug 30, 2023 · Learn how to dynamically add HTML Select Drop Down List Using Vanilla JavaScript. Apr 4, 2012 · 15 I have a web site that contains an HTML form, in this form I have a dropdownlist with list of agents that works in the company, I want to fetch data from MySQL database to this dropdownlist so when you add a new agent his name will appear as an option in the drop down list. Hello, How do I pull saved data from the DB, by selecting a primary-key to populate fields to display in HTML. I am having trouble displaying values from a database table in a dropdown list on my cshtml razor page. Oct 16, 2017 · So that dropdown for state will be filled with the given states. When I convert the DB query from an object to an array using the FormatDataAs&hellip; Dec 20, 2023 · In this simple tutorial, I’ll help you work with HTML Dropdown Lists and JavaScript. Here's a live demo. Feb 21, 2023 · A simple and easy-to-understand tutorial with snippets of populating the HTML's Select box options from MySQL Database using PHP, JS, and jQuery. Fill dropdowns using JavaScript Now, in JavaScript file we make four functions addElements, removeElements to add and remove options from select tag and fillState, fillCity to fill the data in dropdowns by their id (s), which we get by calling document. Jun 7, 2020 · 4 Excuse my lack of knowledge as i am fairly new to ReactJS. In case of more than one values for that particular field name, I plan to have a for loop which will loop through the entire array and append each value and add it to the drop down. Jun 13, 2023 · This tutorial will walk through how to populate an HTML dropdown list with AJAX JSON. // GET: /DailyPax/Create public ActionResult Create() { ViewBag. Mar 14, 2025 · Hi! Thank you so much to everyone for being here with answers to my many questions! I have a new one. Mar 12, 2015 · I have some Javascript that I am using to allow for dynamically added rows on a page. This DDL2 selected value is triggered by previous DDL1 selection (I have that part working). 4:19 - Run the Populate drop-down using Json data that is from database (using Python FLASK) Asked 6 years, 11 months ago Modified 6 years, 11 months ago Viewed 980 times Apr 9, 2014 · I have a WebMethod which gets data that I want to fill DropDown with in a DataSet. The GFG_Fun() the function iterates through the array, creating and appending option elements to the dropdown. php". If you want to show data from the API response in the dropdown then you should make the api call in the mounted lifecycle hook and assign the response. Here "data [0]. parse (). The source code in "getcustomer. Jul 12, 2025 · Utilizes pure JavaScript to dynamically populate a dropdown list with array values. Learn to create a dropdown menu using CSS and JavaScript with this tutorial from W3Schools. Mar 1, 2021 · Populating the Dropdown Now that we have the basic layout of our app and the very beginning of our dropdown — we'll need to go through each object in the fruits array and create an option element for it, with the corresponding value / label. Populate form fields with a query string Populate fields from browser’s local storage Populate fields from external API Populate form from external data sources Populate form fields with a query string If you want to populate I want to populate the 'industry' dropdown with JSON data and send the selected option to a database. Nov 22, 2007 · There are several ways to populate DropDownList control. Nov 23, 2023 · 1 I want to populate a SELECT dropdown list with JSON data using JavaScript. Creating Dropdown List using JavaScript Apr 19, 2022 · In real-time web applications, sometimes we are required to create a dropdown combo box (select-option-html) dynamically which means the options will be loaded at run time for that dropdown list. HTML, CSS, JavaScript, jQuery, and AJAX can be used to implement the dropdown lists. Learn how to populate a dropdown list with an array using JavaScript on Stack Overflow. Jan 20, 2021 · I have a table in my database called DIVISIONS, and a column called CATEGORIES, where I store the users categories for their products. As in the array we can store as many numbers of the option or values. NET MVC5. Here we will see multiple examples to dynamically populate select options in jquery. In this article I will explain how to populate a dropdown list from database values in ASP. Introduction: In this article, we will explore how to implement dynamic dropdown lists in an ASP. Free code download incluedd. If it's string you need to convert it into object using JSON. Net in C# and VB. How can I pass this query and dropdown to the dynamically created table cell? Javascript for dynamically adding Apr 30, 2015 · Here I will explain how to populate or fill or load data in dropdownlist from database in asp. I have two SELECT dropdown lists. getElementById () method. While there are JavaScript plugins you can use, with Blazor we can create native cascading dropdowns bound to data from a database using Entity Framework Core. In this article I have tried to cover some of them including populating DropDownList manually, programmatically, through xml, database, arraylist, hashtable. But when i tried, i am getting empty response. By using these two we can populate a drop down list box. Mar 17, 2025 · Dropdown lists are a common feature in web forms, allowing users to select options from a list. For example, choosing a make, model and year of car, or picking a country, state and city. In this case, we will be using PostgreSQL. as part of a HTML form I am creating I would like to have a dropdown list which will list all the usernames in my database. I want to populate this drop-down list with JSON data from an Ajax response. Nov 11, 2024 · Learn how to bind a dropdown dynamically in React using useState and useEffect. data to a predefined item in data and loop through it in the template. Net Core Razor Pages. I have added servlet code and database code below. Do I even have to use the loop or can I just assign the langArray to some property of select element and every thing will be up and running? Mar 9, 2014 · The AJAX call will send the selected drop down value to a PHP script which will return all matching values from a table in a MySQL database, which will then be used to populate our second drop down. Net Core MVC. I thought the following code would do the trick but the dropdown list is Oct 11, 2021 · Hi Retool Community, I am trying to use data in a database to populate dropdown lists on a form I am creating and I have a couple of issues. If you use this in a separate javascript file you will have to define some global variable pointing to the id of the dropdown list or simply use deterministic ids if you are using ASP. Apr 20, 2024 · Cascading dropdown lists are a common UI pattern for allowing users to drill down and select related options from a hierarchy. It will appear just below the input fields, with a simple border and background color to make it easy to see. Nov 18, 2016 · In my application I have a drop-down list. In this tutorial, you will learn how to create a dynamic dependent dropdown list using JavaScript, PHP, and MySQL. Then return the results as json and populate the other select box with the response you get from the Ajax request. This guide walks you through creating a dynamic select element based on state, using functional components. Below is the code what I have: The JSON data which the server sends: { &quot; Apr 14, 2015 · I am populating a DropDownList from a SQL Server database as shown below. Can someone shed some light on this method, and give some improvements? p May 2, 2012 · I do have a working copy of the Javascript in LifeCycle, but how do I move that over into Javascript within the Acrobat form? There doesn't appear to be a way to "dynamically populate" the drop down selection list from XML data. lang. Jul 12, 2023 · How to Create Dependent Dropdown in Asp. Today, I am providing an article showing you how to bind a DropDownList with a database and display the bound data in a GridView in ASP. This form of input is used many times in real life and the following examples may help to understand the same. Populate select (drop down) with data from API after . Dec 10, 2011 · This will only work if the javascript is inline. This feature enhances user experience by updating one dropdown list based on the selection made in another. Sep 22, 2016 · The DropDownList will be populated from database using Model class and the Html. Jun 7, 2021 · Tutorial describing how to populate ASP. Net into Model class object and then the Model is used to populate the DropDownList using the new ASP. After fetching the API the data should get displayed as the option of the select dropdown and this for loop is not getting executed. Mar 17, 2025 · Before starts creating a dropdown list, it is important to know what is a dropdown list. Jul 2, 2021 · In this code I am not able to create the select option. NET MVC . Instead of all that data being stored locally, it’s stored on another server somewhere & you can access all or part Apr 26, 2019 · Learn a couple common ways to populate dropdown lists in ASP. Jul 1, 2013 · Empties the state and city dropdown Populates the state dropdown (asynchronously) Changing state: Empties the city dropdown Populate the city drop down (asynchronously) Below is a draft outline which shows how to chain the event handlers. May 19, 2015 · I have been trying to figure out a way to populate second dropdown from database, based on user's selection in the first dropdown. Whether you’re creating dynamic forms, populating options from external data sources, or building interactive user interfaces, mastering the add() method is essential for modern web development. A list of categories to which a particular Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more. Now, see the image below. The below image shows the dropdownlist that is generated dynamically. Aug 4, 2022 · The DropDownList items (options) will be populated by fetching data from database using jQuery AJAX and Entity Framework in ASP. php”, and that will be the file that returns us what we need. Aug 6, 2023 · Discover how to dynamically add options to a select element in JavaScript. The dropdown list is basically a button, when the user clicks on that, it expands downward and shows its sub-elements, from which users can select any one of them according to their preferences. NET Core from Database using Model in a step by step way. Dec 2, 2014 · @Richard I want to load the dropdown box with the database contents. NET MVC Razor views with a focus on producing functional HTML forms with a minimum amount of code. It works fine, but I'm not sure it's a good way. How to Create Dependent Dropdown in PHP with AJAX. net and VB. Dropdownlist or @Html. You will learn how to populate lists using JavaScript and how to control Jul 23, 2025 · Any database can be used to load the details of the districts, taluks, and villages that are to be populated in the dropdown. I have a PDF with the following fields: Dropdown5 (dropdown list) FIELD06 (number, no decimals) FIELD07 (number, no decimals) FIELD08 (number There are other ways to populate dropdown in ASP. Thge reason to convert data to xml is that it can be easily populated to next dropdown with help of jQuery/Javascript in fraction of seconds. abc is the field name of the value being returned. Jul 10, 2023 · Dropdown functionality is designed in dynamic way using Javascript. php file. how can i populate the dropdownlist? This article will demonstrate how to bind the values to Razor DropDownList in various ways using ASP. When we select a DeptNo value from dropdown it dynamically populates the { { form. Has anyone else tried to do this or know what I am doing wrong? Here is a sample of what I have down so far Jan 31, 2011 · explained with an example, how to populate DropDownList using JavaScript and AJAX using ASP. Nov 12, 2022 · In this tutorial, I show how you can auto populate dropdown with MySQL database data using JavaScript and PHP. Aug 6, 2024 · In many scenarios, we may need to create a dropdown input that can display all the options consistent with the current state of the database. These examples are beginner friendly and ideal for modern web development. In database, other feilds are getting stored in database but not industry feild. My js data looks like below: I'm trying to get options populated by this way but its not coming all right as I don't know how to populate the options from an array in JS. b ut when i returm the value from the "module" , iam getting full HTML content & not the required database output. NET Core MVC applications. I want to basically take the results of the categories, and then put them into a select dropdown menu, where I can select which category I want Oct 30, 2013 · Using javascript I want to populate a dropdownlist (DDL2) with certain data from a REST JSON endpoint based on the selected value of the DDL2. Before the form is submitted, if the user selects an item from the select box, it will populate the text field for them, using text that is associated with the selected item. Whether you're populating a dropdown with user-generated content or fetching data from an API, understanding how to implement dynamic values in select elements can greatly enhance the user experience. I want to populate the dropdown list from database using jQuery. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. Oct 26, 2024 · The . Since radio input type is used, multiple item selection is not possible. I'm trying to create a dynamic Dropdown system where i have The Country DropDown and the cities DropDown, and i want to fetch my data from a const that has multiple arrays in it, here's an example of the const i have: Jun 7, 2020 · 4 Excuse my lack of knowledge as i am fairly new to ReactJS. json fi Feb 16, 2021 · The records from the Database will be populated into Model class objects and then the Model will be used to populate the DropDownList using the new ASP. In this article, I will demonstrate the simple ways to populate a DropDownList using ViewBag, ViewData, TempData, jQuery, Model, Database, jQuery AJAX, and hardcoding in View. log (data) and check in browser firebug console whether it outputs json string or object. Aug 30, 2021 · Using Vanilla Javascript to Filter Data Returned in a Fetch Request using Dropdown Lists in an HTML form. Sometimes their is a need to fill a Drop Down List from a database table. It can be either through ViewBag or from Model. Oct 29, 2010 · But to pull from a database, we’ll need an intermediary partner that can do that database talking for us (JavaScript can’t do that by itself). php but I need the values should come from the database help me with these Thank you. suggestion-box is hidden at first (using display: none) but will show up when we need to offer an autofill suggestion. Feb 2, 2023 · Learn to create a dynamic drop-down menu using HTML, CSS, and JavaScript. Net Core Application While developing any application using any language, sometimes we must define dropdown control that populates data from the backend May 19, 2015 · Learn how to populate a dropdown list based on the selection in another dropdown using JavaScript. Net. Step 4: Implement JavaScript to Save and Autofill Data Now, let’s add the JavaScript logic to save form data and display suggestions. Net MVC Razor. also how can I clear all dropdownlist items? This video shows how you can auto populate dropdown with MySQL database data using JavaScript and PHP. A set of students who have unique registration numbers. The XML will be read and parsed and then one by one the Node data from the XML data will be added as Items (Options) to DropDownList using plain JavaScript. To explain briefly, an API is a collection of data that you can access by using the fetch() method in JavaScript. Suppose we have a form that asks the user for their country Oct 8, 2021 · It depends a bit how you want to use it. HTML Select element on Button click from XML using JavaScript. In this step-by A cascading dropdown list or a dependent dropdown list gets data from a data source based on a value selected from another dropdown list. Learn different methods to create and append option elements to a select dropdown, including using plain JavaScript and popular libraries like jQuery. Populate the menu with data from an array and make it interactive for enhanced user experience on any website or application. The function demonstrated on this page allows to add items from an array into a dropdown list, as well as adding option groups and custom data attributes. net using C#. map using vanilla JS Asked 5 years, 4 months ago Modified 2 years, 3 months ago Viewed 4k times How to multiselect a dynamically populated dropdown based on another dropdown value selection? I have 2 dropdowns on the page.