Tabs - Documentation | www.HtmlElements.com

Overview

Smart.Tabs element represents a custom element with selectable tabs and content sections associated with them.

Getting Started

Getting Started with Tabs 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 Tabs

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 Tabs module in your application.

    <script type="module" src="node_modules/smart-webcomponents/source/modules/smart.tabs.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 Tabs tag to your Web Page

    <smart-tabs id="tabs"></smart-tabs>

  5. Create the Tabs Component

    	<script type="module">
		Smart('#tabs', class {
			get properties() {
				return { selectedIndex: 0 }
			}
		});
	</script>

    Another option is to create the Tabs is by using the traditional Javascript way:
    	const tabs = document.createElement('smart-tabs');

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

    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 #tabs is the ID of a DIV tag.

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

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

	function init() { 
		const tabs = new Smart.Tabs('#tabs', { selectedIndex: 0 });
	}

  6. Open the page in your web server.
Load scripts

The following code adds the custom element to the page.

<!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.element.js"></script>
 <script type="text/javascript" src="../../source/smart.tabs.js"></script>
</head>
<body>
 <smart-tabs>
    <smart-tab-item label="Tab 1" selected>
    // Content goes here.
    </smart-tab-item>
    <smart-tab-item label="Tab 2">
    // Content goes here.
    </smart-tab-item>
    <smart-tab-item label="Tab 3">
	// Content goes here.
    </smart-tab-item>   
 </smart-tabs>
</body>
</html>

Note how smart.element.js is declared before everything else. This is mandatory for all custom elements.

Demo

Appearance

The position of the tab strip is controlled by setting the property tabPosition. Possible values for it are:

  • top
  • bottom
  • left
  • right
  • hidden
 <smart-tabs tab-position="bottom">
    <smart-tab-item label="Tab 1" selected>
    // Content goes here.
    </smart-tab-item>
    <smart-tab-item label="Tab 2">
    // Content goes here.
    </smart-tab-item>
    <smart-tab-item label="Tab 3">
	// Content goes here.
    </smart-tab-item>  
 </smart-tabs>

Demo

Behavior

When the custom element is not wide enough to display all tabs, one of four behaviours occurs. These are controlled by the overflow property and are:

  • scroll - scroll buttons (instances of smart-repeat-button) allow the tabs to be scrolled through;
  • dropdown - shows a dropdown with all tabs, even those that could not be displayed. Selecting an item from the dropdown makes its corresponding tab visible and selects it;
  • wrap - all tabs are visible and are displayed on multiple lines (if necessary);
  • shrink - tabs shrink in size (if necessary) so that all of them are visible on a single line (similar to how tabs behave in browsers).
 <smart-tabs overflow="scroll">
    <smart-tab-item label="Tab 1" selected>
    // Content goes here.
    </smart-tab-item>
    <smart-tab-item label="Tab 2">
    // Content goes here.
    </smart-tab-item>
    <smart-tab-item label="Tab 3">
	// Content goes here.
    </smart-tab-item>   
    <smart-tab-item label="Tab 4">
	// Content goes here.
    </smart-tab-item>
    <smart-tab-item label="Tab 5">
	// Content goes here.
    </smart-tab-item>
 </smart-tabs>

Demo

The initially selected tab is the one which has the attribute selected. Only one tab can be selected at a given time. If selected is not applied to any tab, the first one is selected by default. Selection can be dynamically changed using the mouse, keyboard and by calling the method select.

The property selectionMode determines the way the user can switch between tabs. Possible values are:

  • click
  • dblclick
  • mouseenter
  • none - tabs can be switched only programmatically.
 <smart-tabs selection-mode="dblclick">
    <smart-tab-item label="Tab 1" selected>
    // Content goes here.
    </smart-tab-item>
    <smart-tab-item label="Tab 2">
    // Content goes here.
    </smart-tab-item>
    <smart-tab-item label="Tab 3">
	// Content goes here.
    </smart-tab-item>   
 </smart-tabs>

Demo

Tabs can be reordered by dragging with the mouse if the property reorder is set to true.

Content sections can be collapsed if the property collapsible is set to true and if the corresponding tab is clicked. Clicking the tab again restores the collapsed content section.

Keyboard Support

User can navigate between the tabs via arrow keys. Arrow Up and Arrow Left decreased the number of the selection, Arrow Down and Arrow Right increase it. Home moves the selection to the first tab, End to the last.

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


Create a new element:
	const tabs = document.createElement('smart-tabs');

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

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

Set a property: 
	tabs.propertyName = propertyValue;

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

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

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

	tabs.addEventListener(eventName, eventHandler);

Remove Event Listener: 
	tabs.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 Tabs 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-tabs

Navigate to the created project folder 

cd smart-angular-tabs

Setup the Tabs

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

  1. Download and install the package.
    npm install smart-webcomponents-angular
  2. Once installed, import the TabsModule in your application root or feature module.

    app.module.ts

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

import { TabsModule } from 'smart-webcomponents-angular/tabs';

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

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

export class AppModule { }

  3. 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"
	]
  4. Example


    app.component.html

     
<smart-tabs #tabs class="demoTabs" [selectedIndex]="1">
    <smart-tab-item [label]="'TAB 1'">Content 1</smart-tab-item>
    <smart-tab-item [label]="'TAB 2'">Content 2</smart-tab-item>
    <smart-tab-item [label]="'TAB 3'">Content 3</smart-tab-item>
    <smart-tab-item [label]="'TAB 4'">Content 4</smart-tab-item>
</smart-tabs>

    app.component.ts

     
import { Component, ViewChild, OnInit, AfterViewInit } from '@angular/core';
import { TabsComponent } from 'smart-webcomponents-angular/tabs';


@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
	styleUrls: ['./app.component.css']
})

export class AppComponent implements AfterViewInit, OnInit {	
	@ViewChild('tabs', { read: TabsComponent, static: false }) tabs!: TabsComponent;
	
 
	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 { TabsModule } from 'smart-webcomponents-angular/tabs';

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

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

export class AppModule { }


Running the Angular application

After completing the steps required to render a Tabs, 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 Tabs Component

Setup React Environment

The easiest way to start with React is to use create-react-app. To scaffold your project structure, follow the installation instructions.

npx create-react-app my-app
cd my-app
npm start

Preparation

Open src/App.js andsrc/App.css

  1. Remove everything inside the App div tag in src/App.js: 
    <div className="App"> </div>
  2. Remove the logo.svg import
  3. Remove the contents of src/App.css
  4. Remove src/logo.svg

Setup the Tabs

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

  1. Download and install the package.
    npm install smart-webcomponents-react
    2. Once installed, import the React Tabs 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 { Tabs, TabItem, TabItemsGroup } from 'smart-webcomponents-react/tabs';

const App = () => {
	return (
		<div>
			<Tabs selectedIndex={1}>
				<TabItem label="TAB 1">Content 1</TabItem>
				<TabItem label="TAB 2">Content 2</TabItem>
				<TabItem label="TAB 3">Content 3</TabItem>
				<TabItem label="TAB 4">Content 4</TabItem>
			</Tabs>
		</div>
	);
}

export default App;

Running the React application

Start the app with 
npm start
and open localhost:3000 in your favorite web browser to see the output.

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

Getting Started with Vue Tabs Component


Setup Vue Environment

We will use vue-cli to get started. Let's install vue-cli

npm install -g @vue/cli

Then we can start creating our Vue.js projects with:

vue create my-project

Setup the Tabs

Open the "my-project" folder and run:

npm install smart-webcomponents

Setup with Vue 3.x

  • 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 src/main.js in your favorite text editor and change its contents to the following:

    main.js

    import { createApp } from 'vue'
import App from './App.vue'

const app = createApp(App)

app.config.isCustomElement = tag => tag.startsWith('smart-');
app.mount('#app')
  • Open src/App.vue in your favorite text editor and change its contents to the following:

    App.vue 

    <template>
  <div class="vue-root">
    <div id="tabs"></div>
  </div>
</template>

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

export default {
  name: "app",
  setup() {
    onMounted(() => {
      window.tabs.innerHTML = `
<smart-tabs class="demoTabs" selected-index="1">
<smart-tab-item label="TAB 1">Content 1</smart-tab-item>
<smart-tab-item label="TAB 2">Content 2</smart-tab-item>
<smart-tab-item label="TAB 3">Content 3</smart-tab-item>
<smart-tab-item label="TAB 4">Content 4</smart-tab-item>
</smart-tabs>
`;
    });
  }
};
</script>

<style>
</style>
    We can now use the smart-tabs with Vue 3. Data binding and event handlers will just work right out of the box.

Setup with Vue 2.x

  • 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 src/main.js in your favorite text editor and change its contents to the following:

    main.js

    import Vue from 'vue'
import App from './App.vue'

Vue.config.productionTip = false
Vue.config.ignoredElements = [
'smart-tabs', 
'smart-tab-item', 
'smart-tab-items-group'
]

new Vue({
  render: h => h(App),
}).$mount('#app')
  • Open src/App.vue in your favorite text editor and change its contents to the following:

    App.vue 

    <template>
  <smart-tabs class="demoTabs" selected-index="1">
    <smart-tab-item label="TAB 1">Content 1</smart-tab-item>
    <smart-tab-item label="TAB 2">Content 2</smart-tab-item>
    <smart-tab-item label="TAB 3">Content 3</smart-tab-item>
    <smart-tab-item label="TAB 4">Content 4</smart-tab-item>
  </smart-tabs>
</template> 

<script>
import "smart-webcomponents/source/modules/smart.tabs.js";
import "smart-webcomponents/source/styles/smart.default.css";

export default {
  name: "app"
};
</script>

<style>
</style>
    We can now use the smart-tabs with Vue. Data binding and event handlers will just work right out of the box.
    We have bound the properties of the smart-tabs to values in our Vue component.

Running the Vue application

Start the app with 
npm run serve
and open localhost:8080 in your favorite web browser to see the output below:

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