Getting started in EJ2 TypeScript Auto complete control
21 Feb 202412 minutes to read
This section explains how to create a simple AutoComplete component and configure its available functionalities in TypeScript, using Essential JS 2 quickstart seed repository.
This application is integrated with the
webpack.config.js
configuration and uses the latest version of the webpack-cli. It requires nodev14.15.0
or higher. For more information about webpack and its features, refer to the webpack documentation.
Dependencies
The following list of dependencies are required to use the AutoComplete component in your application.
|-- @syncfusion/ej2-dropdowns
|-- @syncfusion/ej2-base
|-- @syncfusion/ej2-data
|-- @syncfusion/ej2-inputs
|-- @syncfusion/ej2-lists
|-- @syncfusion/ej2-navigations
|-- @syncfusion/ej2-popups
|-- @syncfusion/ej2-buttons
Set up development environment
Open the command prompt from the required directory, and run the following command to clone the Syncfusion JavaScript (Essential JS 2) quickstart project from GitHub.
git clone https://github.com/SyncfusionExamples/ej2-quickstart-webpack ej2-quickstart
After cloning the application in the ej2-quickstart
folder, run the following command line to navigate to the ej2-quickstart
folder.
cd ej2-quickstart
Add Syncfusion JavaScript packages
Syncfusion JavaScript (Essential JS 2) packages are available on the npmjs.com public registry. You can install all Syncfusion JavaScript (Essential JS 2) controls in a single @syncfusion/ej2 package or individual packages for each control.
The quickstart application is preconfigured with the dependent @syncfusion/ej2 package in the ~/package.json
file. Use the following command to install the dependent npm packages from the command prompt.
npm install
Import the Syncfusion CSS styles
To render AutoComplete component, need to import dropdowns and its dependent components styles as given below in the ~/src/styles/styles.css
file, as shown below:
@import '../../node_modules/@syncfusion/ej2-base/styles/material.css';
@import '../../node_modules/@syncfusion/ej2-buttons/styles/material.css';
@import '../../node_modules/@syncfusion/ej2-inputs/styles/material.css';
@import '../../node_modules/@syncfusion/ej2-popups/styles/material.css';
@import '../../node_modules/@syncfusion/ej2-lists/styles/material.css';
@import '../../node_modules/@syncfusion/ej2-dropdowns/styles/material.css';
Initialize the AutoComplete
The AutoComplete can be initialized through input tags.
Add the HTML input element which needs to be initialized as AutoComplete in index.html
.
[src/index.html]
<!DOCTYPE html>
<html lang="en">
<head>
<title>AutoComplete component</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no" />
<meta name="description" content="Essential JS 2" />
<meta name="author" content="Syncfusion" />
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
....
....
</head>
<body>
<div id='container' style="margin:0 auto; width:300px;">
<!--element which is going to render the AutoComplete-->
<input type="text" tabindex="1" id='atcelement' />
</div>
</body>
</html>
Now import the AutoComplete component to your app.ts
and initialize it to the element #atcelement
as
shown below.
[src/app/app.ts]
import { AutoComplete } from '@syncfusion/ej2-dropdowns';
// initialize AutoComplete component
let atcObject: AutoComplete = new AutoComplete();
// render initialized AutoComplete
atcObject.appendTo('#atcelement');
Binding data source
After initialization, populate the AutoComplete with data using the dataSource
property. Here, an array of string values is passed to the AutoComplete component.
import { AutoComplete } from '@syncfusion/ej2-dropdowns';
// define the array of data
let sportsData: string[] = ['Badminton', 'Basketball', 'Cricket', 'Football', 'Golf', 'Gymnastics', 'Hockey', 'Rugby', 'Snooker', 'Tennis'];
// initialize AutoComplete component
let atcObject: AutoComplete = new AutoComplete({
//set the data to dataSource property
dataSource: sportsData
});
// render initialized AutoComplete
atcObject.appendTo('#atcelement');
Run the application
After completing the configuration required to render a basic AutoComplete, run the following command to display the output in your default browser.
npm run start
The following example illustrates the output in your browser.
import { AutoComplete } from '@syncfusion/ej2-dropdowns';
// defined the array of data
let sportsData: string[] = ['Badminton', 'Basketball', 'Cricket', 'Football', 'Golf', 'Gymnastics', 'Hockey', 'Tennis'];
// initialize AutoComplete component
let atcObject: AutoComplete = new AutoComplete({
//set the data to dataSource property
dataSource: sportsData,
// set placeholder to AutoComplete input element
placeholder: "Find a game"
});
// render initialized AutoComplete
atcObject.appendTo('#atcelement');
<!DOCTYPE html>
<html lang="en">
<head>
<title>Essential JS 2 AutoComplete</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta name="description" content="Typescript UI Controls" />
<meta name="author" content="Syncfusion" />
<link href="styles.css" rel="stylesheet" />
<link href="https://cdn.syncfusion.com/ej2/27.1.48/ej2-base/styles/material.css" rel="stylesheet" />
<link href="https://cdn.syncfusion.com/ej2/27.1.48/ej2-inputs/styles/material.css" rel="stylesheet" />
<link href="https://cdn.syncfusion.com/ej2/27.1.48/ej2-dropdowns/styles/material.css" rel="stylesheet" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
<script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>
<body>
<div id='loader'>LOADING....</div>
<div id='container' style="margin:0 auto; width:250px;">
<input type="text" tabindex="1" id='atcelement' />
</div>
</body>
</html>
Custom values
The AutoComplete allows the user to give input as custom value which is not required to present in predefined set of values. By default, this support is enabled by allowCustom
property. The custom value will be sent to post back handler when a form
is about to be submitted.
import { AutoComplete } from '@syncfusion/ej2-dropdowns';
// defined the array of data
let sportsData: { [key: string]: Object }[] = [
{ Id: 'Game1', Game: 'Badminton' },
{ Id: 'Game2', Game: 'Basketball' },
{ Id: 'Game3', Game: 'Cricket' },
{ Id: 'Game4', Game: 'Football' },
{ Id: 'Game5', Game: 'Golf' },
{ Id: 'Game6', Game: 'Hockey' },
{ Id: 'Game7', Game: 'Rugby' },
{ Id: 'Game8', Game: 'Snooker' }
];
// initialize AutoComplete component
let atcObject: AutoComplete = new AutoComplete({
//set the data to dataSource property
dataSource: sportsData,
// By default, its enabled. For your better understanding, showcase this property.
allowCustom: true,
// maps the appropriate column to fields property
fields: { value: 'Game' },
// set placeholder to AutoComplete input element
placeholder: "Find a game"
});
// render initialized AutoComplete
atcObject.appendTo('#atcelement');
<!DOCTYPE html>
<html lang="en">
<head>
<title>Essential JS 2 AutoComplete</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta name="description" content="Typescript UI Controls" />
<meta name="author" content="Syncfusion" />
<link href="styles.css" rel="stylesheet" />
<link href="https://cdn.syncfusion.com/ej2/27.1.48/ej2-base/styles/material.css" rel="stylesheet" />
<link href="https://cdn.syncfusion.com/ej2/27.1.48/ej2-inputs/styles/material.css" rel="stylesheet" />
<link href="https://cdn.syncfusion.com/ej2/27.1.48/ej2-dropdowns/styles/material.css" rel="stylesheet" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
<script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>
<body>
<div id='loader'>LOADING....</div>
<div id='container' style="margin:0 auto; width:250px;">
<input type="text" tabindex="1" id='atcelement' />
</div>
</body>
</html>
Configure the suggestion list
By default, suggestion list width automatically adjusts according to the AutoComplete input element’s width, and the height of the suggestion list has ‘300px’.
The height and width of the popup list can also be customized using the popupHeight
and popupWidth
property respectively.
In the following sample, suggestion list’s width and height are configured.
import { AutoComplete } from '@syncfusion/ej2-dropdowns';
// define the array of data
let sportsData: string[] = ['Badminton', 'Basketball', 'Cricket', 'Football', 'Golf', 'Gymnastics', 'Hockey', 'Rugby', 'Snooker', 'Tennis'];
// initialize AutoComplete component
let atcObject: AutoComplete = new AutoComplete({
//set the data to dataSource property
dataSource: sportsData
//set width to suggestion list
popupWidth: '250px',
// set placeholder to AutoComplete input element
placeholder: "Find a game",
// set the popup list height
popupHeight: "250px"
});
// render initialized AutoComplete
atcObject.appendTo('#atcelement');
<!DOCTYPE html>
<html lang="en">
<head>
<title>Essential JS 2 AutoComplete</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta name="description" content="Typescript UI Controls" />
<meta name="author" content="Syncfusion" />
<link href="styles.css" rel="stylesheet" />
<link href="https://cdn.syncfusion.com/ej2/27.1.48/ej2-base/styles/material.css" rel="stylesheet" />
<link href="https://cdn.syncfusion.com/ej2/27.1.48/ej2-inputs/styles/material.css" rel="stylesheet" />
<link href="https://cdn.syncfusion.com/ej2/27.1.48/ej2-dropdowns/styles/material.css" rel="stylesheet" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
<script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>
<body>
<div id='loader'>LOADING....</div>
<div id='container' style="margin:0 auto; width:250px;">
<input type="text" tabindex="1" id='atcelement' />
</div>
</body>
</html>