Forge

By utilizing the Server Side Dropdown with Lazy Loading custom Forge component, OutSystems developers can enhance their applications' dropdown functionality, delivering an improved user experience with optimized performance.

This is a Dropdown Tag Widget, So I Have Created a sample in case you have to create a Cascading Dropdown with tags and you have to select the number of tags on the parent dropdown and you want to show the related result on the second dropdown.

Allows you to select multiple vlues from dropdown with search functionality.
On Apply event you will get selected values list.

Grad out(disable) Some option of dropdown from list and grad in(enable) some option

This forge is a simple example of Custom Dropdown. If you want image with text you can refer to this forge.
eg Name of County and Flag in a single dropdown.

Dropdown Select Time

This web block was implemented as a response to this post on the forum:
https://www.outsystems.com/forums/discussion/79843/outsystems-ui-animated-label-is-not-working-for-dropdown/

The issue was resolved: "I am using an animated label with dropdown as input. The label is not moving up when I focus on the dropdown"

DropdownSearchWithAnimatedLabel allows using Outsystems UI Animated Label with Dropdown Search. This was implemented because Animated Label doesn`t support work with Dropdown-Search and there is no straightforward way to implement it without using custom javascript.

One more issue that was addressed: the Animated Label widget's ExtendedClass property is not appending the conditional style class based on the runtime change in condition. We are appending the "active" class in custom javascript calls. 

You can list dropdown items with image associated with each record.

An optimized search bar to get results from different data points available in your project/organization.

This Asset is basically used for the dynamic years accumulation in a dropdown so that we can use it every year or on a long term basis as it changes according to current year.

As of now I have Previous year, Current year and Next year value in dropdown. User can change according to his requirements.

The Hierarchical Dropdowns (HD Control) in OutSystems is a custom UI component designed to display hierarchical data (like countries and states) within a single dropdown. Instead of using multiple cascading dropdowns, this control allows nested data to be represented in one dropdown with indentation or grouping for clarity.
Upon selection, the full hierarchical path (e.g., "USA > California > Los Angeles") is displayed as the selected value, providing clear context to the user.

This application contains a library module that contains client action to return selected element text

Advance DropDown with multiple values selection

list up previous and future year, and Select Year

Custom Input Elements all the elements designed and ready to use using animated label for all input text, Text area, Date picker, dropdown and dropdown search

A flexible and reusable multi-select dropdown component with nested group headers

This is just an Demo Application of populate Dropdowns, This Explain About how the  populate Dropdowns Works And Its Function 

The Single Select Dropdown is an alternative to the OutSystems Single Dropdown with new features. It has options to set the number of items to be displayed in the dropdown list with previous and next options. And there is an option to display the disabled items in the dropdown list.

This asset provides a customized dropdown tag selector that enhances user experience by limiting the number of visible tags to three. When more than three tags are selected, the component intelligently displays an ellipsis ("...") to indicate additional hidden tags. This approach keeps the UI clean and avoids clutter, especially in scenarios where users may select multiple tags.

OutSystems implementation of the React Select library.

a custom dropdown where you can add title and items