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Getting started with JavaScript (ES5) Signature control

24 May 2022 / 5 minutes to read

The Essential JS 2 for JavaScript (global script) is an ES5 formatted pure JavaScript framework which can be directly used in latest web browsers.

Dependencies

The following list of dependencies are required to use the Signature control in your application.

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|-- @syncfusion/ej2-base

Control Initialization

The Essential JS 2 JavaScript controls can be initialized by using either of the following ways.

  • Using local script and style references in a HTML page.
  • Using CDN link for script and style reference.

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 Essentials JS 2 script and style references.

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<!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 initiate the Syncfusion JavaScript Signature control in the index.html by using following code

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<!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.

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/ej2/20.1.57/{DEPENDENCY_PACKAGE_NAME}/dist/global/{PACKAGE_NAME}.min.js

Control Script: https://cdn.syncfusion.com/ej2/20.1.57/{PACKAGE_NAME}/dist/global/{PACKAGE_NAME}.min.js

Dependency Styles: https://cdn.syncfusion.com/ej2/20.1.57/{DEPENDENCY_PACKAGE_NAME}/styles/material.css

Control Styles: https://cdn.syncfusion.com/ej2/20.1.57/{PACKAGE_NAME}/styles/material.css

Example:

Script: https://cdn.syncfusion.com/ej2/20.1.57/ej2-inputs/dist/global/ej2-inputs.min.js

Styles: https://cdn.syncfusion.com/ej2/20.1.57/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.

Source
Preview
index.html
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<!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/ej2/20.1.57/ej2-base/styles/material.css" rel="stylesheet" type="text/css" />

<!-- Essential JS 2 Signature's material theme -->
<link href="https://cdn.syncfusion.com/ej2/20.1.57/ej2-inputs/styles/material.css" rel="stylesheet" type="text/css" />

<!-- Essential JS 2 Signature's dependent scripts -->
<script src="https://cdn.syncfusion.com/ej2/20.1.57/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/ej2/20.1.57/ej2-inputs/dist/global/ej2-inputs.min.js" type="text/javascript"></script>

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

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