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Getting started in EJ2 JavaScript Signature control

10 Feb 20268 minutes to read

This section explains the steps required to create a simple Essential^® JS 2 Signature and demonstrate the basic usage of the Signature control in a JavaScript application.

Dependencies

The list of dependencies required to use the Signature component in your application is given below:

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

Setup for local environment

Refer to the following steps to set up your local environment.

Step 1: Create a root folder named my-app for your application.

Step 2: Create a my-app/resources folder to store local scripts and styles files.

Step 3: Open Visual Studio Code and create my-app/index.js and my-app/index.html files to initialize the Essential^® JS 2 Signature control.

Adding Syncfusion^® resources

The Essential^® JS 2 Signature control can be initialized by using either of the following ways.

Using local script and style.
Using CDN link for script and style.

Using local script and style references in a HTML page

Step 1: Create an app folder quickstart for getting started.

Step 2: You can get the global scripts and styles from the Essential Studio^® JavaScript (Essential^® JS 2) build installed location.

Syntax:

Dependency Script: **(installed location)**\Syncfusion\Essential Studio\JavaScript - EJ2\{RELEASE_VERSION}\Web (Essential JS 2)\JavaScript\{DEPENDENCY_PACKAGE_NAME}\dist\global\{DEPENDENCY_PACKAGE_NAME}.min.js

Control Script: **(installed location)**\Syncfusion\Essential Studio\JavaScript - EJ2\{RELEASE_VERSION}\Web (Essential JS 2)\JavaScript\{PACKAGE_NAME}\dist\global\{PACKAGE_NAME}.min.js

Dependency Styles: **(installed location)**\Syncfusion\Essential Studio\JavaScript - EJ2\{RELEASE_VERSION}\Web (Essential JS 2)\JavaScript\{DEPENDENCY_PACKAGE_NAME}\styles\material.css

Control Styles: **(installed location)**\Syncfusion\Essential Studio\JavaScript - EJ2\{RELEASE_VERSION}\Web (Essential JS 2)\JavaScript\{PACKAGE_NAME}\styles\material.css

Example:

Dependency Script: C:\Program Files (x86)\Syncfusion\Essential Studio\JavaScript - EJ2\19.3.0.44\Web (Essential JS 2)\JavaScript\ej2-base\dist\global\ej2-base.min.js

Control Script: C:\Program Files (x86)\Syncfusion\Essential Studio\JavaScript - EJ2\19.3.0.44\Web (Essential JS 2)\JavaScript\ej2-inputs\dist\global\ej2-inputs.min.js

Dependency Styles: C:\Program Files (x86)\Syncfusion\Essential Studio\JavaScript - EJ2\19.3.0.44\Web (Essential JS 2)\JavaScript\ej2-base\styles\material.css

Control Styles: C:\Program Files (x86)\Syncfusion\Essential Studio\JavaScript - EJ2\19.3.0.44\Web (Essential JS 2)\JavaScript\ej2-inputs\styles\material.css

The below located script and style file contains all Syncfusion^® JavaScript (ES5) UI control resources in a single file.

Scripts: **(installed location)**\Syncfusion\Essential Studio\JavaScript - EJ2\{RELEASE_VERSION}\Web (Essential JS 2)\JavaScript\ej2\dist\ej2.min.js

Styles: **(installed location)**\Syncfusion\Essential Studio\JavaScript - EJ2\{RELEASE_VERSION}\Web (Essential JS 2)\JavaScript\ej2\material.css

The Custom Resource Generator (CRG) is an online web tool, which can be used to generate the custom script and styles for a set of specific controls. This web tool is useful to combine the required control scripts and styles in a single file.

Step 3: Create a folder ~/quickstart/resources and copy/paste the global scripts and styles from the above installed location to quickstart/resources/package corresponding package location.

Step 4: Create a HTML page (index.html) in ~/quickstart/index.html location and add the Essential^® JS 2 script and style references.

<!DOCTYPE html>
  <html xmlns="http://www.w3.org/1999/xhtml">
       <head>
          <title>Essential JS 2 - Signature</title>
          <!-- Essential JS 2 Inputs's dependent material theme -->
          <link href="resources/base/material.css" rel="stylesheet" type="text/css"/>

          <!-- Essential JS 2 Signature's control material theme -->
          <link href="resources/inputs/material.css" rel="stylesheet" type="text/css"/>

          <!-- Essential JS 2 Inputs's dependent global script -->
          <script src="resources/base/ej2-base.min.js" type="text/javascript"></script>

          <!-- Essential JS 2 Inputs's control global script -->
          <script src="resources/inputs/ej2-inputs.min.js" type="text/javascript"></script>
       </head>
       <body>
       </body>
  </html>

Step 5: Now, add the Signature element and initialize the Syncfusion^® JavaScript Signature control in the index.html as shown below

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">

<head>
    <title>Essential JS 2 - Signature</title>
    <!-- Essential JS 2 Inputs's dependent material theme -->
    <link href="resources/base/material.css" rel="stylesheet" type="text/css"/>

    <!-- Essential JS 2 Signature's control material theme -->
    <link href="resources/inputs/material.css" rel="stylesheet" type="text/css"/>

    <!-- Essential JS 2 Signature's dependent global script -->
    <script src="resources/base/ej2-base.min.js" type="text/javascript"></script>

    <!-- Essential JS 2 Signature's control global script -->
    <script src="resources/inputs/ej2-inputs.min.js" type="text/javascript"></script>
</head>

<body>
    <!--element which is going to render-->
    <div>
        <canvas id="signature"></canvas>
    </div>

    <script>
        //Signature definition
        this.default = function() {
            new ej.inputs.Signature({}, '#signature');
        };
    </script>
</body>

</html>

Step 6: Now, run the index.html in web browser, it will render the Syncfusion^® JavaScript Signature control.

Using CDN link for script and style reference

Step 1: Create an app folder quickstart for getting started.

Step 2: The Essential^® JS 2 control’s global scripts and styles are already hosted in the below CDN link formats.

Syntax:

Dependency Script: https://cdn.syncfusion.com/ej2/{DEPENDENCY_PACKAGE_NAME}/dist/global/{PACKAGE_NAME}.min.js

Control Script: https://cdn.syncfusion.com/ej2/{PACKAGE_NAME}/dist/global/{PACKAGE_NAME}.min.js

Dependency Styles: https://cdn.syncfusion.com/ej2/{DEPENDENCY_PACKAGE_NAME}/styles/material.css

Control Styles: https://cdn.syncfusion.com/ej2/{PACKAGE_NAME}/styles/material.css

Example:

Script: https://cdn.syncfusion.com/ej2/ej2-inputs/dist/global/ej2-inputs.min.js

Styles: https://cdn.syncfusion.com/ej2/ej2-inputs/styles/material.css

Step 3: Create a HTML page (index.html) in ~/quickstart/index.html location and add the CDN link references. Now, add the Signature element and initiate the Syncfusion^® JavaScript Signature control in the index.html by using following code.

Step 4: Now, run the index.html in web browser, it will render the Syncfusion^® JavaScript Signature control.

Adding Signature component to the application

Add the HTML canvas tag with the id attribute as signature to your index.html file.

index.html
styles.css
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">

<head>
                
<title>Essential JS 2 - Signature</title>

<!-- Essential JS 2 Signature's dependent material theme -->
<link href="https://cdn.syncfusion.com/ej2/32.2.3/ej2-base/styles/material.css" rel="stylesheet" type="text/css" />

<!-- Essential JS 2 Signature's material theme -->
<link href="https://cdn.syncfusion.com/ej2/32.2.3/ej2-inputs/styles/material.css" rel="stylesheet" type="text/css" />

<!-- Essential JS 2 Signature's dependent scripts -->
<script src="https://cdn.syncfusion.com/ej2/32.2.3/ej2-base/dist/global/ej2-base.min.js" type="text/javascript"></script>

<!-- Essential JS 2 Signature's global script -->
<script src="https://cdn.syncfusion.com/ej2/32.2.3/ej2-inputs/dist/global/ej2-inputs.min.js" type="text/javascript"></script>

<!--style reference from app-->
<link href="index.css" rel="stylesheet" />
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
<h4>Sign here</h4>
<!--element which is going to render-->
<div id="signature-control">
    <canvas id="signature"></canvas>
</div>
</body>

<script>
var signature = new ej.inputs.Signature({}, '#signature');
</script>

</html>
#container {
    visibility: hidden;
    padding-left: 5%;
    width: 100%;
  }
  #loader {
    color: #008cff;
    font-family: 'Helvetica Neue','calibiri';
    font-size: 14px;
    height: 40px;
    left: 45%;
    position: absolute;
    top: 45%;
    width: 30%;
  }

  #signature {
    border: 1px solid lightgray;
    height: 100%;
    width: 100%;
  }

  #signature-control {
    height: 300px;
    width: 550px;
  }

The Signature control will render default height and width of canvas (300 * 150), when the Signature height and width are not specified.

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How can I help you?

Getting started in EJ2 JavaScript Signature control

Dependencies

Setup for local environment

Adding Syncfusion^® resources

Using local script and style references in a HTML page

Using CDN link for script and style reference

Adding Signature component to the application

How can I help you?

Getting started in EJ2 JavaScript Signature control

Dependencies

Setup for local environment

Adding Syncfusion® resources

Using local script and style references in a HTML page

Using CDN link for script and style reference

Adding Signature component to the application

Adding Syncfusion^® resources