Getting started in EJ2 TypeScript Circular gauge control

3 Nov 20236 minutes to read

This section briefly explains how to create a simple Circular gauge 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 node v14.15.0 or higher. For more information about webpack and its features, refer to the webpack documentation.

Dependencies

Below is the list of minimum dependencies required to use the circular gauge.

|-- @syncfusion/ej2-circulargauge
    |-- @syncfusion/ej2-base
    |-- @syncfusion/ej2-svg-base
    |-- @syncfusion/ej2-pdf-export

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

Add Circular Gauge control to the Project

The Essential JS2 Circular Gauge control can be added to the application. To get started, add the Circular Gauge control to the app.ts and index.html files using the following code.

Add an HTML div element to act as the Circular Gauge element in the index.html file using the following code.

<!DOCTYPE html>
<html lang="en">

<head>
  <title>EJ2 Circular Gauge</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" />
</head>

<body>
  <!--container which is going to render the Circular gauge-->
  <div id='container'>
  </div>
</body>

</html>

Import the Circular Gauge control in the app.ts to initialize the Circular Gauge and append the Circular Gauge instance to the #container.

import { CircularGauge } from '@syncfusion/ej2-circulargauge';

// initialize CircularGauge component
let gauge: CircularGauge = new CircularGauge();

// render initialized CircularGauge
gauge.appendTo('#container');

Run the application

The quickstart project is configured to compile and run the application in the browser. Use the following command to run the application.

npm start

The below example shows a basic Circular Gauge control.

import { CircularGauge } from '@syncfusion/ej2-circulargauge';

let gauge: CircularGauge = new CircularGauge();
gauge.appendTo('#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</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="index.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.1.48/ej2-popups/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'>
        <div id='element'></div>
    </div>
</body>

</html>

Set Pointer Value

You can change the pointer value in the above sample using value property in pointers.

import { CircularGauge } from '@syncfusion/ej2-circulargauge';
let gauge: CircularGauge = new CircularGauge({
    axes:[{
        pointers:[{
            value: 35
        }],
    }]
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</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="index.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.1.48/ej2-popups/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'>
        <div id='element'></div>
    </div>
</body>

</html>