MultilineTextBox - Documentation | www.HtmlElements.com

Overview

Smart.MultilineTextBox element represents multi row editable text box, supported two different display modes. The element also inherits the properties of a standard Textarea.

Getting Started

Getting Started with MultilineTextBox 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 MultilineTextBox

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 MultilineTextBox module in your application.

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

    <smart-multiline-text-box id="multilinetextbox"></smart-multiline-text-box>

  5. Create the MultilineTextBox Component

    	<script type="module">
		Smart('#multilinetextbox', class {
			get properties() {
				return { value: "Peter Brown" }
			}
		});
	</script>

    Another option is to create the MultilineTextBox is by using the traditional Javascript way:
    	const multilinetextbox = document.createElement('smart-multiline-text-box');

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

    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 #multilinetextbox is the ID of a DIV tag.

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

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

	function init() { 
		const multilinetextbox = new Smart.MultilineTextBox('#multilinetextbox', { value: "Peter Brown" });
	}

  6. Open the page in your web server.

Appearance

The Multiline Text Box could be filled with value via the value property 

<!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/smartbutton.js"></script>
 <script type="text/javascript" src="../../source/smartscrollbar.js"></script>
 <script type="text/javascript" src="../../source/smartlistbox.js"></script>
 <script type="text/javascript" src="../../source/smartdropdownlist.js"></script>
 <script type="text/javascript" src="../../source/smarttextbox.js"></script>
 <script type="text/javascript" src="../../source/smartmultilinetextbox.js"></script>
 <script>
 window.onload = function () {
    document.querySelector('smart-multiline-text-box').value = 'Multiline Text Box New Value';
 }
 </script>
</head>
<body>
 <smart-multiline-text-box></smart-multiline-text-box>
</body>
</html>

Demo

Element's content could be set also on initialization if plain text is wrapped between it's open and closing tag.

 <smart-multiline-text-box>Multiline Text Box Value</smart-multiline-text-box>

Demo

The appearance of scrollbars could be controlled via allowHorizontalScrollbar and allowVerticalScrollbar properties.

 <smart-multiline-text-box allow-vertical-scrollbar></smart-multiline-text-box>

Demo

The Multiline Text Box could be resized via small icon in the bottom right corner when resizable is set to true.

 <smart-multiline-text-box resizable>Multiline Text Box</smart-multiline-text-box>

Demo

Behavior

The element offers two display modes:

  • default
  • escaped

In default display mode Smart.MultilineTextBox behaves like a standard textarea.In escaped mode special characters are escaped.

Here's how to set a new displayMode on element initialiation:

 <smart-multiline-text-box display-mode="escaped"></smart-multiline-text-box>

And here's how to change it via javascript after the element has been initialized:

<!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.button.js"></script>
 <script type="text/javascript" src="../../source/smart.scrollbar.js"></script>
 <script type="text/javascript" src="../../source/smart.listbox.js"></script>
 <script type="text/javascript" src="../../source/smart.dropdownlist.js"></script>
 <script type="text/javascript" src="../../source/smart.textbox.js"></script>
 <script type="text/javascript" src="../../source/smart.multilinetextbox.js"></script>
 <script>
 window.onload = function () {
    document.querySelector('smart-multiline-text-box').displayMode = 'escaped';
 }
 </script>
</head>
<body>
 <smart-multiline-text-box></smart-multiline-text-box>
</body>
</html>

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


Create a new element:
	const multilinetextbox = document.createElement('smart-multiline-text-box');

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

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

Set a property: 
	multilinetextbox.propertyName = propertyValue;

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

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

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

	multilinetextbox.addEventListener(eventName, eventHandler);

Remove Event Listener: 
	multilinetextbox.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 MultilineTextBox 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-multilinetextbox

Navigate to the created project folder 

cd smart-angular-multilinetextbox

Setup the MultilineTextBox

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 MultilineTextBoxModule in your application root or feature module.

    app.module.ts

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

import { MultilineTextBoxModule } from 'smart-webcomponents-angular/multilinetextbox';

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

@NgModule({
    declarations: [ AppComponent ],
    imports: [ BrowserModule, MultilineTextBoxModule ],
    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-multiline-text-box #multilinetextbox [enterKeyBehavior]="'newLine'" [selectAllOnFocus]="true" [autoFocus]="true"
    [placeholder]="'smart Text Area'"></smart-multiline-text-box>

    app.component.ts

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


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

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

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

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

export class AppModule { }


Running the Angular application

After completing the steps required to render a MultilineTextBox, 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 MultilineTextBox 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 MultilineTextBox

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 MultilineTextBox 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 { MultilineTextBox, ListItem, ListItemsGroup } from 'smart-webcomponents-react/multilinetextbox';

class App extends React.Component {

	init() {

	}


	componentDidMount() {

	}

	render() {
		return (
			<div>
				<MultilineTextBox enterKeyBehavior="newLine" selectAllOnFocus autoFocus placeholder="smart Text Area"></MultilineTextBox>
			</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 MultilineTextBox 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 MultilineTextBox

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">
    <smart-multiline-text-box
      enter-key-behavior="newLine"
      select-all-on-focus
      auto-focus
      placeholder="smart Text Area"
    ></smart-multiline-text-box>
  </div>
</template>

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

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

<style>
</style>
    We can now use the smart-multiline-text-box 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-multiline-text-box'
]

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-multiline-text-box id="multilinetextbox"></smart-multiline-text-box>  
	 </template>   
	 <script>  
	 import "smart-webcomponents/source/styles/smart.default.css";  
	 import 'smart-webcomponents/source/modules/smart.multilinetextbox.js';  
	 export default {  
	  name: "app",  
	  mounted: function() {  
	   window.Smart(  
		"#multilinetextbox", class {  
		 get properties() {  
			return  { value: "Peter Brown" } 
		 }  
		}  
	   );  
	  }  
	 };  
	 </script>  
	 <style>  
	  body {  
	   min-height: 700px;  
	  }  
	 </style>
    We can now use the smart-multiline-text-box with Vue. Data binding and event handlers will just work right out of the box.
    We have bound the properties of the smart-multiline-text-box 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/.