DropDownList - Documentation | www.HtmlElements.com

Overview

Smart.DropDownList represents an input with a dropdown list of items.

Getting Started

Getting Started with DropDownList Web Component

Smart UI for Web Components is distributed as smart-webcomponents NPM package. You can also get the full download from our website with all demos from the Download page.

Setup the DropDownList

Smart UI for Web Components is distributed as smart-webcomponents NPM package

  1. Download and install the package.

    npm install smart-webcomponents

  2. Once installed, import the DropDownList module in your application.

    <script type="module" src="node_modules/smart-webcomponents/source/modules/smart.dropdownlist.js"></script>

  3. Adding CSS reference

    The smart.default.css CSS file should be referenced using following code.

    <link rel="stylesheet" type="text/css" href="node_modules/smart-webcomponents/source/styles/smart.default.css" />

  4. Add the DropDownList tag to your Web Page

    <smart-drop-down-list id="dropdownlist"></smart-drop-down-list>

  5. Create the DropDownList Component

    	<script type="module">
		Smart('#dropdownlist', class {
			get properties() {
				return { selectionMode: "one" }
			}
		});
	</script>

    Another option is to create the DropDownList is by using the traditional Javascript way:
    	const dropdownlist = document.createElement('smart-drop-down-list');

	dropdownlist.disabled = true;
	document.body.appendChild(dropdownlist);

    Smart framework provides a way to dynamically create a web component on demand from a DIV tag which is used as a host. The following imports the web component's module and creates it on demand, when the document is ready. The #dropdownlist is the ID of a DIV tag.

    	import "../../source/modules/smart.dropdownlist.js";

	document.readyState === 'complete' ? init() : window.onload = init;

	function init() { 
		const dropdownlist = new Smart.DropDownList('#dropdownlist', { selectionMode: "one" });
	}

  6. Open the page in your web server.

Appearance

Smart.DropDownList allows to completely customize the content of the list items.

In order to change the content of an item, itemTemplate property has to be applied by assigning the id of an HTML Template element that's located inside the DOM. Here's an example:

<!DOCTYPE html>
<html lang="en">
<head>
 <link rel="stylesheet" href="../../source/styles/smart.default.css" type="text/css" />
 <script type="text/javascript" src="../../source/smart.elements.js"></script>
</head>
<body>
 <template id="template">
     <span class="glyphicon glyphicon-ok"></span>
     <span> {{label}}</span>
 </template>

 <smart-drop-down-list item-template="template">
     <smart-list-item selected value="1">Item 1</smart-list-item>
     <smart-list-item value="2">Item 2</smart-list-item>
     <smart-list-item value="3">Item 3</smart-list-item>
 </smart-drop-down-list>
</body>
</html>

The template contains a binding field surrounded by curly braces {{ label }}. The text between the breckets can be random.

Demo

Smart.DropDownList has the abbility to behave like a simple input field or an input field with a separate drop down button. The dropDownOpenMode property determines how the drop down will open. The element can have two separate buttons: an action and a dropDown button if the property is set to 'dropDownButton'.

Available modes for dropDownOpenMode:

  • none - the popup doesn't open.
  • default - opens if the user clicks on the dropDownButton
  • dropDownButton - the input and the button behave like two separate elements. The drop down button becomes focusable using keyboard interaction.
  • auto - the drop down popup opens when the mouse is over the element and closes when not.
<smart-drop-down-list drop-down-open-mode="dropDownButton">
     <smart-list-item >Item 1</smart-list-item>
     <smart-list-item selected>Item 2</smart-list-item>
     <smart-list-item>Item 3</smart-list-item>
     <smart-list-item>Item 4</smart-list-item>
     <smart-list-item>Item 5</smart-list-item>
 </smart-drop-down-list>

Demo

Data Binding

Adding data to the Combo box can be accomplished in a few ways:

  • Nesting Smart.ListItem elements inside the Combo box's body in the HTML: 
     <smart-drop-down-list>
     <smart-list-item value="value1">Item1</smart-list-item>
     <smart-list-item selected value="value2">Item2</smart-list-item>
     <smart-list-item value="value3">Item3</smart-list-item>
 </smart-drop-down-list>

    Demo

    Smart.ListItem has a label and a value property. The value property can have a separate value from the label or no value at all. The user can prefer to apply a value only to the label and it will be automatically assigned to value as well.

    The text inside the list item represents the value of the label property. It can also be set in the HTML code like shown in the example above.


  • Nesting Smart.ListItemGroup elements inside the DropDownList's body in the HTML: 
    <smart-drop-down-list>
    <smart-list-items-group label="Group 1">
        <smart-list-item>Item 1</smart-list-item>
        <smart-list-item>Item 2</smart-list-item>
        <smart-list-item>Item 3</smart-list-item>
    </smart-list-items-group>
    <smart-list-items-group label="Group 2">
        <smart-list-item>Item 4</smart-list-item>
        <smart-list-item>Item 5</smart-list-item>
        <smart-list-item>Item 6</smart-list-item>
    </smart-list-items-group>
    <smart-list-items-group label="Group 3">
        <smart-list-item>Item 7</smart-list-item>
        <smart-list-item>Item 8</smart-list-item>
        <smart-list-item>Item 9</smart-list-item>
    </smart-list-items-group>
</smart-drop-down-list>

    Smart.ListItemGroup represents a group of items.

    Grouping can also be enabled later via javascript by applying the grouped property.

    Demo

  • Nesting HTML list elements inside the Combo box's body in the HTML: 
    <smart-drop-down-list>
     <ul label="Group 1">
         <li>Item 1</li>
         <li>Item 2</li>
         <li>Item 3</li>
         <li>Item 4</li>
         <li>Item 5</li>
     </ul>
     <ul label="Group 2">
         <li>Item 6</li>
         <li>Item 7</li>
         <li>Item 8</li>
         <li>Item 9</li>
         <li>Item 10</li>
     </ul>
 </smart-drop-down-list>

    List items can be added without the ul tag. The grouping can be added at a later stage by setting the grouped property to the element.

    Demo

  • Nesting optgroup elements inside the Combo box's body in the HTML: 
    <smart-drop-down-list>
     <optgroup label="Group 1">
         <option value="1">Item 1</option>
         <option value="2">Item 2</option>
     </optgroup>
     <optgroup label="Group 2">
         <option value="3">Item 3</option>
         <option value="4">Item 4</option>
     </optgroup>
 </smart-drop-down-list>

    optgroups are the items of an HTML select element. As usual the value attribute can be applied to each list item to assign a specific value that can differ from the label.

    Demo

  • Setting the dataSource property of the element to a new value of type Array.

    The property can be changed dynamically via javascript after the element has been initialized:

    <!DOCTYPE html>
<html>
<head>
 <link rel="stylesheet" href=../../source/styles/smart.default.css" type="text/css" />
 <script type="text/javascript" src="../../source/smart.elements.js"></script>
 <script>
 window.onload = function () {
     document.querySelector('smart-drop-down-list').dataSource =
         [
             "Item 1",
             "Item 2",
             "Item 3"
         ];
     }
 </script>
</head>
<body>
 <smart-drop-down-list></smart-drop-down-list>
</body>
</html>

    Demo

    dataSource accepts Arrays of strings or Objects. An object can contain more specific data for the items. For example:

    <!DOCTYPE html>
<html>
<head>
 <link rel="stylesheet" href=../../source/styles/smart.default.css" type="text/css" />
 <script type="text/javascript" src="../../source/smart.elements.js"></script>
 <script>
 window.onload = function () {
     var dropDownList = document.querySelector('smart-drop-down-list');

     dropDownList.dataSource = [
         {
             label: 'Item 1',
             value: 1
         },
         {
             label: 'Item 2',
             value: 2
         },
         {
             label: 'Item 3',
             value: 3,
             disabled: true
         },
         {
             label: 'Item 4',
             value: 4
         },
         {
             label: 'Item 5',
             value: 5
         },
     ];
 } 
 </script>
</head>
<body>
 <smart-drop-down-list></smart-drop-down-list>
</body>
</html>

    Demo

    Like every other custom element property, dataSource can also be set from the HTML in the tag of the element, like so:

    <smart-drop-down-list data-source='["Item1", "Item2", "Item3"]'></smart-drop-down-list>

    Demo


Manipulating the content

The element offers the following methods:

  • Insert method can create and insert new list items into the element.

    The insert method can be called at any time after the element has been initialized.

    The method accepts two arguments:

    1. The index at which the item will be inserted.
    2. An array of strings or a single string representing the labels of the items to be inserted.

    <!DOCTYPE html>
<html>
<head>
 <link rel="stylesheet" href=../../source/styles/smart.default.css" type="text/css" />
 <script type="text/javascript" src="../../source/smart.elements.js"></script>
 <script>
     window.onload = function () {
         var dropDownList = document.querySelector('smart-drop-down-list');

         dropDownList.insert(0, ["Item1", "Item2", "Item3"]);
         dropDownList.insert(2, 'Item4');
     }
 </script>
</head>
<body>
 <smart-drop-down-list></smart-drop-down-list>
</body>
</html>

    Demo

  • Update method allow List items to be modified after creation.

    Update method accepts two arguments:
    1. The index of the item to be updated.
    2. Details for the item. This argument can be an object containing properties of smartListItem, e.g. label, value, disabled. It can also be a simple string that represents the new label of the item that will be updated.

    <!DOCTYPE html>
<html>
<head>
 <link rel="stylesheet" href=../../source/styles/smart.default.css" type="text/css" />
 <script type="text/javascript" src="../../source/smart.elements.js"></script>
 <script>
     window.onload = function () {
         var dropDownList = document.querySelector('smart-drop-down-list');

         //Create items
         dropDownList.insert(0, ["Item1", "Item2", "Item3"]);
         dropDownList.insert(2, 'Item4');

         //Update items
         dropDownList.update(1, 'Item12');
         dropDownList.update(2, { label: 'Item13', value: '13', disabled: true });
     }
 </script>
</head>
<body>
 <smart-drop-down-list></smart-drop-down-list>
</body>
</html>

    Demo

  • Remove deletes an item from the element. The method accepts a single argument - the index of the item to be removed.

    Here's an example:

    <!DOCTYPE html>
<html>
<head>
 <link rel="stylesheet" href=../../source/styles/smart.default.css" type="text/css" />
 <script type="text/javascript" src="../../source/smart.elements.js"></script>
 <script>
     window.onload = function () {
         var dropDownList = document.querySelector('smart-drop-down-list');

         //Create items
         dropDownList.insert(0, ["Item1", "Item2", "Item3"]);
         dropDownList.insert(2, 'Item4');

         //Update items
         dropDownList.update(1, 'Item12');
         dropDownList.update(2, { label: 'Item13', value: '13', disabled: true });

         //Remove items
         dropDownList.remove(2);
         dropDownList.remove(0);
     }
 </script>
</head>
<body>
 <smart-drop-down-list></smart-drop-down-list>
</body>
</html>

    Demo

  • clearItems removes all items from the element. Takes no arguments: 
    window.onload = function () {
    var dropDownList = document.querySelector('smart-drop-down-list');

    dropDownList.clearItems();
}

Behavior

Smart.DropDownList offers different drop down positions: bottom, top, overlay-center, overlay-bottom, overlay-top, center-top, center-bottom and auto. The position of the listBox drop down can be modified via the dropDownPosition property, like so:

<!DOCTYPE html>
<html>
<head>
 <link rel="stylesheet" href=../../source/styles/smart.default.css" type="text/css" />
 <script type="text/javascript" src="../../source/smart.elements.js"></script>
 <script>
     window.onload = function () {
         var dropDownList = document.querySelector('smart-drop-down-list');

         dropDownList.dropDownPosition = 'top';
     }
 </script>
</head>
<body>
 <smart-drop-down-list>
    <smart-list-item>Item 1</smart-list-item>
    <smart-list-item>Item 2</smart-list-item>
    <smart-list-item>Item 3</smart-list-item>
 </smart-drop-down-list>
</body>
</html>

Demo

Similar to any other property dropDownPosition can be set in the HTML with an attribute:

<smart-drop-down-list drop-down-position="bottom">
    <smart-list-item>Item 1</smart-list-item>
    <smart-list-item>Item 2</smart-list-item>
    <smart-list-item>Item 3</smart-list-item>
</smart-drop-down-list>

Demo

The default value of the property is 'auto'. This means that the element will automatically determine the position of the drop down depending on the space available. The algorithm always starts by trying to place the drop down below the element. If there's no space available it moves it above the element.

Keyboard Support

The following keys apply to the Combo box element:

Key Action
Alt + Arrow Up/Down Open/Close the drop down popup.
Enter Select/Unselect an item form the list or open/close the drop down popup if the drop down button is focused when dropDownOpenMode is set to dropDownButton.
Arrow Up Navigate to the previous item from the list if the drop down popup is opened.
Arrow Down Navigate to the next item in the list if the drop down popup is opened.
Escape Close the drop down popup.

Create, Append, Remove, Get/Set Property, Invoke Method, Bind to Event


Create a new element:
	const dropdownlist = document.createElement('smart-drop-down-list');

Append it to the DOM: 
	document.body.appendChild(dropdownlist);

Remove it from the DOM: 
	dropdownlist.parentNode.removeChild(dropdownlist);

Set a property: 
	dropdownlist.propertyName = propertyValue;

Get a property value: 
	const propertyValue = dropdownlist.propertyName;

Invoke a method: 
	dropdownlist.methodName(argument1, argument2);

Add Event Listener: 
	const eventHandler = (event) => {
	   // your code here.
	};

	dropdownlist.addEventListener(eventName, eventHandler);

Remove Event Listener: 
	dropdownlist.removeEventListener(eventName, eventHandler, true);

Using with Typescript

Smart Web Components package includes TypeScript definitions which enables strongly-typed access to the Smart UI Components and their configuration.

Inside the download package, the typescript directory contains .d.ts file for each web component and a smart.elements.d.ts typescript definitions file for all web components. Copy the typescript definitions file to your project and in your TypeScript file add a reference to smart.elements.d.ts

Read more about using Smart UI with Typescript.

Getting Started with Angular DropDownList Component

Setup Angular Environment

Angular provides the easiest way to set angular CLI projects using Angular CLI tool.

Install the CLI application globally to your machine. 

npm install -g @angular/cli

Create a new Application

ng new smart-angular-dropdownlist

Navigate to the created project folder 

cd smart-angular-dropdownlist

Setup the DropDownList

Smart UI for Angular is distributed as smart-webcomponents-angular NPM package

  1. Download and install the package.
    npm install smart-webcomponents-angular
  2. Adding CSS reference

    The following CSS file is available in ../node_modules/smart-webcomponents-angular/ package folder. This can be referenced in [src/styles.css] using following code. 

    @import 'smart-webcomponents-angular/source/styles/smart.default.css';

    Another way to achieve the same is to edit the angular.json file and in the styles add the style. 

    "styles": [
		"node_modules/smart-webcomponents-angular/source/styles/smart.default.css"
	]
    If you want to use Bootstrap, Fluent or other themes available in the package, you need to add them after 'smart.default.css'.
  3. Example with Angular Standalone Components


    app.component.html

     <smart-drop-down-list #dropdownlist [selectedIndexes]="[0]">
    <smart-list-item [value]="'1'">Affogato</smart-list-item>
    <smart-list-item [value]="'2'">Americano</smart-list-item>
    <smart-list-item [value]="'3'">Bicerin</smart-list-item>
    <smart-list-item [value]="'4'">Breve</smart-list-item>
    <smart-list-item [value]="'5'">Cappuccino</smart-list-item>
    <smart-list-item [value]="'6'">Cafe Crema</smart-list-item>
    <smart-list-item [value]="'7'">Cafe Corretto</smart-list-item>
    <smart-list-item [value]="'8'">Cafe macchiato</smart-list-item>
    <smart-list-item [value]="'9'">Cafe mocha</smart-list-item>
    <smart-list-item [value]="'10'">Cortado</smart-list-item>
    <smart-list-item [value]="'11'">Cuban espresso</smart-list-item>
    <smart-list-item [value]="'12'">Espresso</smart-list-item>
    <smart-list-item [value]="'13'">Eiskaffee</smart-list-item>
    <smart-list-item [value]="'14'">Frappuccino</smart-list-item>
    <smart-list-item [value]="'15'">Galao</smart-list-item>
    <smart-list-item [value]="'16'">Greek frappe coffee</smart-list-item>
    <smart-list-item [value]="'17'">Iced Coffee</smart-list-item>
    <smart-list-item [value]="'18'">Instant Coffee</smart-list-item>
    <smart-list-item [value]="'19'">Latte</smart-list-item>
    <smart-list-item [value]="'20'">Liqueur coffee</smart-list-item>
</smart-drop-down-list>

    app.component.ts

     import { Component, ViewEncapsulation, ViewChild, OnInit, AfterViewInit } from '@angular/core';
import { DropDownListComponent } from 'smart-webcomponents-angular/dropdownlist';


import { CommonModule } from '@angular/common';
import { RouterOutlet } from '@angular/router';
import { DropDownListModule } from 'smart-webcomponents-angular/dropdownlist';

@Component({
    selector: 'app-root',
	standalone: true,
	imports: [CommonModule, DropDownListModule, RouterOutlet],
	encapsulation: ViewEncapsulation.None,
    templateUrl: './app.component.html',
	styleUrls: ['./app.component.css']
})

export class AppComponent implements AfterViewInit, OnInit {	
	@ViewChild('dropdownlist', { read: DropDownListComponent, static: false }) dropdownlist!: DropDownListComponent;
	
 
	ngOnInit(): void {
		// onInit code.
	}

	ngAfterViewInit(): void {
		// afterViewInit code.
		this.init();
    }
		
	init(): void {
		// init code.
	    

	}	
}

  4. Example with Angular NGModule


    app.component.html

     <smart-drop-down-list #dropdownlist [selectedIndexes]="[0]">
    <smart-list-item [value]="'1'">Affogato</smart-list-item>
    <smart-list-item [value]="'2'">Americano</smart-list-item>
    <smart-list-item [value]="'3'">Bicerin</smart-list-item>
    <smart-list-item [value]="'4'">Breve</smart-list-item>
    <smart-list-item [value]="'5'">Cappuccino</smart-list-item>
    <smart-list-item [value]="'6'">Cafe Crema</smart-list-item>
    <smart-list-item [value]="'7'">Cafe Corretto</smart-list-item>
    <smart-list-item [value]="'8'">Cafe macchiato</smart-list-item>
    <smart-list-item [value]="'9'">Cafe mocha</smart-list-item>
    <smart-list-item [value]="'10'">Cortado</smart-list-item>
    <smart-list-item [value]="'11'">Cuban espresso</smart-list-item>
    <smart-list-item [value]="'12'">Espresso</smart-list-item>
    <smart-list-item [value]="'13'">Eiskaffee</smart-list-item>
    <smart-list-item [value]="'14'">Frappuccino</smart-list-item>
    <smart-list-item [value]="'15'">Galao</smart-list-item>
    <smart-list-item [value]="'16'">Greek frappe coffee</smart-list-item>
    <smart-list-item [value]="'17'">Iced Coffee</smart-list-item>
    <smart-list-item [value]="'18'">Instant Coffee</smart-list-item>
    <smart-list-item [value]="'19'">Latte</smart-list-item>
    <smart-list-item [value]="'20'">Liqueur coffee</smart-list-item>
</smart-drop-down-list>

    app.component.ts

     import { Component, ViewEncapsulation, ViewChild, OnInit, AfterViewInit } from '@angular/core';
import { DropDownListComponent } from 'smart-webcomponents-angular/dropdownlist';


@Component({
    selector: 'app-root',
	encapsulation: ViewEncapsulation.None,
    templateUrl: './app.component.html',
	styleUrls: ['./app.component.css']
})

export class AppComponent implements AfterViewInit, OnInit {	
	@ViewChild('dropdownlist', { read: DropDownListComponent, static: false }) dropdownlist!: DropDownListComponent;
	
 
	ngOnInit(): void {
		// onInit code.
	}

	ngAfterViewInit(): void {
		// afterViewInit code.
		this.init();
    }
		
	init(): void {
		// init code.
	    

	}	
}

    app.module.ts

     import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';

import { DropDownListModule } from 'smart-webcomponents-angular/dropdownlist';

import { AppComponent } from './app.component';

@NgModule({
    declarations: [ AppComponent ],
    imports: [ BrowserModule, DropDownListModule ],
    bootstrap: [ AppComponent ]
})

export class AppModule { }


Running the Angular application

After completing the steps required to render a DropDownList, run the following command to display the output in your web browser

ng serve
and open localhost:4200 in your favorite web browser.

Read more about using Smart UI for Angular: https://www.htmlelements.com/docs/angular-cli/.

Getting Started with React DropDownList Component

Setup React Environment

The easiest way to start with React is to use NextJS Next.js is a full-stack React framework. It’s versatile and lets you create React apps of any size—from a mostly static blog to a complex dynamic application.

npx create-next-app my-app
cd my-app
npm run dev
or 
yarn create next-app my-app
cd my-app
yarn run dev

Preparation

Setup the DropDownList

Smart UI for React is distributed as smart-webcomponents-react package

  1. Download and install the package.

    In your React Next.js project, run one of the following commands to install Smart UI DropDownList for React

    With NPM: 

    npm install smart-webcomponents-react
    With Yarn: 
    yarn add smart-webcomponents-react

  2. Once installed, import the React DropDownList Component and CSS files in your application and render it. app.js

    import 'smart-webcomponents-react/source/styles/smart.default.css';
import React from "react";
import ReactDOM from "react-dom/client";
import { DropDownList, ListItem } from 'smart-webcomponents-react/dropdownlist';

function App() {
	return (
		<div>
			<DropDownList  selectedIndexes={[0]}>
				<ListItem value="1">Affogato</ListItem>
				<ListItem value="2">Americano</ListItem>
				<ListItem value="3">Bicerin</ListItem>
				<ListItem value="4">Breve</ListItem>
				<ListItem value="5">Cappuccino</ListItem>
				<ListItem value="6">Cafe Crema</ListItem>
				<ListItem value="7">Cafe Corretto</ListItem>
				<ListItem value="8">Cafe macchiato</ListItem>
				<ListItem value="9">Cafe mocha</ListItem>
				<ListItem value="10">Cortado</ListItem>
				<ListItem value="11">Cuban espresso</ListItem>
				<ListItem value="12">Espresso</ListItem>
				<ListItem value="13">Eiskaffee</ListItem>
				<ListItem value="14">Frappuccino</ListItem>
				<ListItem value="15">Galao</ListItem>
				<ListItem value="16">Greek frappe coffee</ListItem>
				<ListItem value="17">Iced Coffee</ListItem>
				<ListItem value="18">Instant Coffee</ListItem>
				<ListItem value="19">Latte</ListItem>
				<ListItem value="20">Liqueur coffee</ListItem>
			</DropDownList>
		</div>
	 );
}


export default App;

Running the React application

Start the app with 
npm run dev
or 
yarn run dev
and open localhost:3000 in your favorite web browser to see the output.

Setup with Vite

Vite (French word for "quick", pronounced /vit/, like "veet") is a build tool that aims to provide a faster and leaner development experience for modern web projects
With NPM: 
npm create vite@latest
With Yarn: 
yarn create vite
Then follow the prompts and choose React as a project.

Navigate to your project's directory. By default it is 'vite-project' and install Smart UI for React

In your Vite project, run one of the following commands to install Smart UI DropDownList for React

With NPM: 

npm install smart-webcomponents-react
With Yarn: 
yarn add smart-webcomponents-react

Open src/App.tsx App.tsx

import 'smart-webcomponents-react/source/styles/smart.default.css';
import React from "react";
import ReactDOM from "react-dom/client";
import { DropDownList, ListItem } from 'smart-webcomponents-react/dropdownlist';

function App() {
	return (
		<div>
			<DropDownList  selectedIndexes={[0]}>
				<ListItem value="1">Affogato</ListItem>
				<ListItem value="2">Americano</ListItem>
				<ListItem value="3">Bicerin</ListItem>
				<ListItem value="4">Breve</ListItem>
				<ListItem value="5">Cappuccino</ListItem>
				<ListItem value="6">Cafe Crema</ListItem>
				<ListItem value="7">Cafe Corretto</ListItem>
				<ListItem value="8">Cafe macchiato</ListItem>
				<ListItem value="9">Cafe mocha</ListItem>
				<ListItem value="10">Cortado</ListItem>
				<ListItem value="11">Cuban espresso</ListItem>
				<ListItem value="12">Espresso</ListItem>
				<ListItem value="13">Eiskaffee</ListItem>
				<ListItem value="14">Frappuccino</ListItem>
				<ListItem value="15">Galao</ListItem>
				<ListItem value="16">Greek frappe coffee</ListItem>
				<ListItem value="17">Iced Coffee</ListItem>
				<ListItem value="18">Instant Coffee</ListItem>
				<ListItem value="19">Latte</ListItem>
				<ListItem value="20">Liqueur coffee</ListItem>
			</DropDownList>
		</div>
	 );
}


export default App;

Read more about using Smart UI for React: https://www.htmlelements.com/docs/react/.

Getting Started with Vue DropDownList Component


Setup Vue with Vite

In this section we will introduce how to scaffold a Vue Single Page Application on your local machine. The created project will be using a build setup based on Vite and allow us to use Vue Single-File Components (SFCs). Run the following command in your command line 
npm create vue@latest
This command will install and execute create-vue, the official Vue project scaffolding tool. You will be presented with prompts for several optional features such as TypeScript and testing support: 
✔ Project name: … 
✔ Add TypeScript? … No / Yes
✔ Add JSX Support? … No / Yes
✔ Add Vue Router for Single Page Application development? … No / Yes
✔ Add Pinia for state management? … No / Yes
✔ Add Vitest for Unit testing? … No / Yes
✔ Add an End-to-End Testing Solution? … No / Cypress / Playwright
✔ Add ESLint for code quality? … No / Yes
✔ Add Prettier for code formatting? … No / Yes

Scaffolding project in ./...
Done.
If you are unsure about an option, simply choose No by hitting enter for now. Once the project is created, follow the instructions to install dependencies and start the dev server: 
cd 
npm install
npm install smart-webcomponents
npm run dev

  • Make Vue ignore custom elements defined outside of Vue (e.g., using the Web Components APIs). Otherwise, it will throw a warning about an Unknown custom element, assuming that you forgot to register a global component or misspelled a component name.

    Open vite.config.js in your favorite text editor and change its contents to the following:

    vite.config.js

    import { fileURLToPath, URL } from 'node:url'

import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'

// https://vitejs.dev/config/
export default defineConfig({
  plugins: [
    vue({
      template: {
        compilerOptions: {
          isCustomElement: tag => tag.startsWith('smart-')
        }
      }
    })
  ],
  resolve: {
    alias: {
      '@': fileURLToPath(new URL('./src', import.meta.url))
    }
  }
})
  • Open src/App.vue in your favorite text editor and change its contents to the following:

    App.vue 

    <template>
  <div class="vue-root">
    <smart-drop-down-list selected-indexes="[0]">
      <smart-list-item value="1">Affogato</smart-list-item>
      <smart-list-item value="2">Americano</smart-list-item>
      <smart-list-item value="3">Bicerin</smart-list-item>
      <smart-list-item value="4">Breve</smart-list-item>
      <smart-list-item value="5">Cappuccino</smart-list-item>
      <smart-list-item value="6">Cafe Crema</smart-list-item>
      <smart-list-item value="7">Cafe Corretto</smart-list-item>
      <smart-list-item value="8">Cafe macchiato</smart-list-item>
      <smart-list-item value="9">Cafe mocha</smart-list-item>
      <smart-list-item value="10">Cortado</smart-list-item>
      <smart-list-item value="11">Cuban espresso</smart-list-item>
      <smart-list-item value="12">Espresso</smart-list-item>
      <smart-list-item value="13">Eiskaffee</smart-list-item>
      <smart-list-item value="14">Frappuccino</smart-list-item>
      <smart-list-item value="15">Galao</smart-list-item>
      <smart-list-item value="16">Greek frappe coffee</smart-list-item>
      <smart-list-item value="17">Iced Coffee</smart-list-item>
      <smart-list-item value="18">Instant Coffee</smart-list-item>
      <smart-list-item value="19">Latte</smart-list-item>
      <smart-list-item value="20">Liqueur coffee</smart-list-item>
    </smart-drop-down-list>
  </div>
</template>

<script>
import { onMounted } from "vue";
import "smart-webcomponents/source/styles/smart.default.css";
import "smart-webcomponents/source/modules/smart.dropdownlist.js";

export default {
  name: "app",
  setup() {
    onMounted(() => {});
  }
};
</script>

<style>
smart-drop-down-list {
  min-height: 35px;
  height: auto;
  width: 300px;
}
</style>
    We can now use the smart-drop-down-list with Vue 3. Data binding and event handlers will just work right out of the box.

Running the Vue application

Start the app with 
npm run dev
and open http://localhost:5173/ in your favorite web browser to see the output below:
When you are ready to ship your app to production, run the following: 
npm run build
This will create a production-ready build of your app in the project's ./dist directory.

Read more about using Smart UI for Vue: https://www.htmlelements.com/docs/vue/.