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Getting started with JavaScript Rating control

08 May 2023 / 3 minutes to read

This section explains how to create a simple application with Rating control and to configure it.

Dependencies

The list of dependencies required to use the Rating control in your application is given as follows:

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|-- @syncfusion/ej2-inputs
    |-- @syncfusion/ej2-base
    |-- @syncfusion/ej2-popups

Setup your development environment

To get started with the Rating control, you can clone the Essential JS 2 quickstart project using the following commands:

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git clone https://github.com/syncfusion/ej2-quickstart.git quickstart
cd quickstart
npm install

The project is preconfigured with common settings (src/styles/styles.css, system.config.js) to start all the Essential JS 2 components.

[src/system.config.js]

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System.config({
paths: {
    'npm:': './node_modules/',
    'syncfusion:': 'npm:@syncfusion/'
},
map: {
    app: 'app',

    //Syncfusion packages mapping
    "@syncfusion/ej2-base": "syncfusion:ej2-base/dist/ej2-base.umd.min.js",
    "@syncfusion/ej2-inputs": "syncfusion:ej2-inputs/dist/ej2-inputs.umd.min.js",
    "@syncfusion/ej2-popups": "syncfusion:ej2-popups/dist/ej2-popups.umd.min.js"
},
packages: {
    'app': { main: 'app', defaultExtension: 'js' }
}
});

System.import('app.ts').catch(console.error.bind(console)).then(function () {
document.getElementById('loader').style.display = "none";
document.getElementById('container').style.visibility = "visible";
});

Adding Rating to the Application

Add the HTML input tag with ID attribute as the rating to your index.html file.

[src/index.html]

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

<head>
<title>Essential JS 2 Rating</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 Rating" />
<meta name="author" content="Syncfusion" />
<link rel="shortcut icon" href="resources/favicon.ico" />
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />

<!--style reference from app-->
<link href="/styles/styles.css" rel="stylesheet" />

<!--system js reference and configuration-->
<script src="node_modules/systemjs/dist/system.src.js" type="text/javascript"></script>
<script src="system.config.js" type="text/javascript"></script>
</head>

<body>
<div>
    <!--Element to render the rating control-->
    <input id="rating"/>
</div>

</body>

</html>

Then, import the Rating control in your app.ts file, and initialize it with the #rating.

[src/app/app.ts]

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import { Rating } from '@syncfusion/ej2-inputs';

// Initializes the Rating control
let rating: Rating = new Rating();

// Render initialized Rating.
rating.appendTo('#rating');

Adding Style sheet to the Application

To render Rating control, need to import inputs and its dependent controls styles as given below in styles.css.

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@import "../node_modules/@syncfusion/ej2-base/styles/material.css";
@import "../node_modules/@syncfusion/ej2-inputs/styles/material.css";
@import "../node_modules/@syncfusion/ej2-popups/styles/material.css";

Run the application

Run the application in the browser using the following command.

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npm start

The following example shows a basic Rating control.

Source
Preview
app.ts
index.html
styles.css
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import { Rating } from '@syncfusion/ej2-inputs';
import { enableRipple } from '@syncfusion/ej2-base';

enableRipple(true);

// Initializes the Rating control
let rating: Rating = new Rating();

// Render initialized Rating.
rating.appendTo('#rating');
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<!DOCTYPE html>
<html lang="en">

<head>
            
    <title>EJ2 Rating</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="TypeScript Rating Control" />
    <meta name="author" content="Syncfusion" />
    <link href="styles.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-inputs/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>
</head>
<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div class='wrap'>
            <input id="rating"/>
        </div>
    </div>
</body>
</html>
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#container {
    visibility: hidden;
}

#loader {
  color: #008cff;
  font-family: 'Helvetica Neue','calibiri';
  font-size: 14px;
  height: 40px;
  left: 45%;
  position: absolute;
  top: 45%;
  width: 30%;
}

.wrap {
  margin: 50px auto;
  text-align: center;
}

Value

You can set the rating value by using the value property.

Source
Preview
app.ts
index.html
styles.css
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import { Rating } from '@syncfusion/ej2-inputs';
import { enableRipple } from '@syncfusion/ej2-base';

enableRipple(true);

// Initialize the Rating control.
let rating: Rating = new Rating({ value:3.0 });

// Render initialized Rating.
rating.appendTo('#rating');
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<!DOCTYPE html>
<html lang="en">

<head>
            
    <title>EJ2 Rating</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="TypeScript Rating Component" />
    <meta name="author" content="Syncfusion" />
    <link href="styles.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-inputs/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>
</head>
<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div class='wrap'>
            <input id="rating"/>
        </div>
    </div>
</body>
</html>
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#container {
    visibility: hidden;
}

#loader {
  color: #008cff;
  font-family: 'Helvetica Neue','calibiri';
  font-size: 14px;
  height: 40px;
  left: 45%;
  position: absolute;
  top: 45%;
  width: 30%;
}

.wrap {
  margin: 50px auto;
  text-align: center;
}
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