JavaScript (ES5)

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Getting started with JavaScript (ES5) Diagram control

06 Jun 2023 / 9 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.

Component Initialization

The Essential JS 2 JavaScript components 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 myApp for Essential JS 2 JavaScript components.

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

Syntax:

Script: **(installed location)**/Syncfusion/Essential Studio/{RELEASE_VERSION}/Essential JS 2/{PACKAGE_NAME}/dist/global/{PACKAGE_NAME}.min.js

Styles: **(installed location)**/Syncfusion/Essential Studio/{RELEASE_VERSION}/Essential JS 2/{PACKAGE_NAME}/styles/material.css

Example:

Script: C:/Program Files (x86)/Syncfusion/Essential Studio/15.4.30/Essential JS 2/ej2-diagrams/dist/global/ej2-diagrams.min.js

Styles: C:/Program Files (x86)/Syncfusion/Essential Studio/15.4.30/Essential JS 2/ej2-diagrams/styles/material.css

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

Step 4: Create a HTML page (index.html) in myApp location and add the Essentials JS 2 script and style references.

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

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

Step 5: Now, add the Diagram element and initiate the Essential JS 2 Diagram component in the index.html by using following code

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

        <!-- Essential JS 2 Diagram's global script -->
        <script src="resources/ej2-diagrams.min.js" type="text/javascript"></script>
   </head>
   <body>
        <!-- Add the HTML <div> element  -->
         <div id="element">Diagram</div>
        <script>
            // initialize diagram component
            var diagram = new ej.diagrams.Diagram();

            // Render initialized diagram.
            diagram.appendTo('#element')
        </script>
   </body>
  </html>

Step 6: Now, run the index.html in web browser, it will render the Essential JS 2 Diagram component.

Using CDN link for script and style reference

Step 1: Create an app folder myApp for the Essential JS 2 JavaScript components.

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

Syntax:

Script: http://cdn.syncfusion.com/ej2/21.2.3/{PACKAGE_NAME}/dist/global/{PACKAGE_NAME}.min.js

Styles: http://cdn.syncfusion.com/ej2/21.2.3/{PACKAGE_NAME}/styles/material.css

Example:

Script: http://cdn.syncfusion.com/ej2/21.2.3/ej2-diagrams/dist/global/ej2-diagrams.min.js

Styles: http://cdn.syncfusion.com/ej2/21.2.3/ej2-diagrams/styles/material.css

Step 3: Create a HTML page (index.html) in myApp location and add the CDN link references. Now, add the Diagram element and initiate the Essential JS 2 Diagram component in the index.html by using following code.

Source

Preview

index.html

<!DOCTYPE html><html lang="en"><head>
            
    <title>EJ2 Diagram</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="//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-splitbuttons/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-diagrams/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-navigations/styles/fabric.css" rel="stylesheet">
    
<script src="https://cdn.syncfusion.com/ej2/21.2.3/dist/ej2.min.js" type="text/javascript"></script>
</head>

<body>
    
    <div id="container">
        <div id="element"></div>
    </div>


<script>
var ele = document.getElementById('container');
if(ele) {
    ele.style.visibility = "visible";
 }   
        </script>
<script src="index.js" type="text/javascript"></script>
</body></html>

Step 4: Now, run the index.html in web browser, it will render the Essential JS 2 Diagram component.

Flow Diagram

Create and add node

Create and add a node (JSON data) with specific position, size, label, and shape.

Source

Preview

index.js

index.html

var nodes = [
    {
        id: 'Start', width: 140, height: 50, offsetX: 300, offsetY: 50,
        annotations: [{
            id: 'label1',
            content: 'Start'
        }],
	    shape: { type: 'Flow', shape: 'Terminator'}
    }
];

var diagram = new ej.diagrams.Diagram({
    width: '100%', height: '600px', nodes: nodes
    }, '#element');

<!DOCTYPE html><html lang="en"><head>
            
    <title>EJ2 Diagram</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="//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-splitbuttons/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-diagrams/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-navigations/styles/fabric.css" rel="stylesheet">
    
<script src="https://cdn.syncfusion.com/ej2/21.2.3/dist/ej2.min.js" type="text/javascript"></script>
</head>

<body>
    
    <div id="container">
        <div id="element"></div>
    </div>


<script>
var ele = document.getElementById('container');
if(ele) {
    ele.style.visibility = "visible";
 }   
        </script>
<script src="index.js" type="text/javascript"></script>
</body></html>

Note: The annotations property is an array, which indicates that more than one label can be added to a node.

Connect Nodes

Add two node to the diagram as shown in the previous example. Connect these nodes by adding a connector using the connector property and refer the source and target end by using the sourceNode and targetNode properties.

Source

Preview

index.js

index.html

var nodes = [
    {
        id: 'Start', width: 140, height: 50, offsetX: 300, offsetY: 50,
        annotations: [{
            id: 'label1',
            content: 'Start'
        }],
	    shape: { type: 'Flow', shape: 'Terminator'}
    },
    {
        id: 'Init', width: 140, height: 50, offsetX: 300, offsetY: 140,
        shape: { type: 'Flow', shape: 'process' },
        annotations: [{ content: 'var i = 0;' }]
    }
];

var connector = {
	id: "connector1",
	sourceID: "Start",
	targetID: "Init",
    type: 'Orthogonal'
};


var diagram = new ej.diagrams.Diagram({
    width: '100%', height: '350px', nodes: nodes, connectors: [connector]
    }, '#element');

<!DOCTYPE html><html lang="en"><head>
            
    <title>EJ2 Diagram</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="//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-splitbuttons/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-diagrams/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-navigations/styles/fabric.css" rel="stylesheet">
    
<script src="https://cdn.syncfusion.com/ej2/21.2.3/dist/ej2.min.js" type="text/javascript"></script>
</head>

<body>
    
    <div id="container">
        <div id="element"></div>
    </div>


<script>
var ele = document.getElementById('container');
if(ele) {
    ele.style.visibility = "visible";
 }   
        </script>
<script src="index.js" type="text/javascript"></script>
</body></html>

Default values for all nodes and connectors can be set using the getNodeDefaults and getConnectorDefaults properties, respectively. For example, if all nodes have the same width and height, such properties can be moved into getNodeDefaults.

Complete flow diagram

Similarly, the required nodes and connectors can be added to form a complete flow diagram.

Source

Preview

index.js

index.html

var nodes = [
    { id: 'Start', offsetY: 50, annotations: [{ content: 'Start' }], shape: { type: 'Flow', shape: 'Terminator' } },
    { id: 'Init', offsetY: 140, annotations: [{ content: 'var i = 0;' }], shape: { type: 'Flow', shape: 'Process' } },
    { id: 'Condition', offsetY: 230, annotations: [{ content: 'i < 10?' }], shape: { type: 'Flow', shape: 'Decision' } },
    { id: 'Print', offsetY: 320, annotations: [{ content: 'print(\'Hello!!\');' }], shape: { type: 'Flow', shape: 'PreDefinedProcess' } },
    { id: 'Increment', offsetY: 410, annotations: [{ content: 'i++;' }], shape: { type: 'Flow', shape: 'Process' } },
    { id: 'End', offsetY: 500, annotations: [{ content: 'End' }], shape: { type: 'Flow', shape: 'Terminator' } },
];

var connector = [
    { id: 'connector1', sourceID: 'Start', targetID: 'Init' },
    { id: 'connector2', sourceID: 'Init', targetID: 'Condition' },
    { id: 'connector3', sourceID: 'Condition', targetID: 'Print', annotations: [{ content: 'Yes' }] },
    {
        id: 'connector4', sourceID: 'Condition', targetID: 'End', annotations: [{ content: 'No' }],
        type: 'Orthogonal',
        segments: [{ length: 50, direction: 'Bottom' }]
    },
    { id: 'connector5', sourceID: 'Print', targetID: 'Increment' },
    {
        id: 'connector6', sourceID: 'Increment', targetID: 'Condition',
        type: 'Orthogonal',
        segments: [{ length: 50, direction: 'Bottom' }]
    }
];

var diagram = new ej.diagrams.Diagram({
    width: '100%', height: '600px', nodes: nodes, connectors: connector
    }, '#element');

<!DOCTYPE html><html lang="en"><head>
            
    <title>EJ2 Diagram</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="//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-splitbuttons/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-diagrams/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-navigations/styles/fabric.css" rel="stylesheet">
    
<script src="https://cdn.syncfusion.com/ej2/21.2.3/dist/ej2.min.js" type="text/javascript"></script>
</head>

<body>
    
    <div id="container">
        <div id="element"></div>
    </div>


<script>
var ele = document.getElementById('container');
if(ele) {
    ele.style.visibility = "visible";
 }   
        </script>
<script src="index.js" type="text/javascript"></script>
</body></html>

Automatic organization chart

In the ‘Flow Diagram’ section, how to create a diagram manually was discussed. This section explains how to create and position the diagram automatically.

Business object (Employee information)

Define Employee Information as JSON data. The following code example shows an employee array whose, Name is used as an unique identifier and ReportingPerson is used to identify the person to whom an employee report to, in the organization.

//Initialize data source...
var data = [{Name: "Elizabeth", Role: "Director" },
{ Name: "Christina", ReportingPerson: "Elizabeth", Role: "Manager" },
{ Name: "Yoshi", ReportingPerson: "Christina", Role: "Lead" },
{ Name: "Philip", ReportingPerson: "Christina", Role: "Lead" },
{ Name: "Yang", ReportingPerson: "Elizabeth", Role: "Manager" },
{ Name: "Roland", ReportingPerson: "Yang", Role: "Lead" },
{ Name: "Yvonne", ReportingPerson: "Yang", Role: "Lead" }
];

Map data source

You can configure the above “Employee Information” with diagram, so that the nodes and connectors are automatically generated using the mapping properties. The following code example show how dataSourceSettings is used to map ID and parent with property name identifiers for employee information.

//Initialize data source...

var data = [{Name: "Elizabeth", Role: "Director" },
{ Name: "Christina", ReportingPerson: "Elizabeth", Role: "Manager" },
{ Name: "Yoshi", ReportingPerson: "Christina", Role: "Lead" },
{ Name: "Philip", ReportingPerson: "Christina", Role: "Lead" },
{ Name: "Yang", ReportingPerson: "Elizabeth", Role: "Manager" },
{ Name: "Roland", ReportingPerson: "Yang", Role: "Lead" },
{ Name: "Yvonne", ReportingPerson: "Yang", Role: "Lead" }
];

var items = new DataManager(data as JSON[], new Query().take(7));

//Initialize data source...
var diagram = new ej.diagrams.Diagram({
width: '100%', height: '600px',

//Configure data source for diagram

dataSourceSettings: {
    id: 'Name', parentId: 'ReportingPerson', dataManager: items
}
});

Visualize employee

The following code examples indicate how to define the default appearance of nodes and connectors. The setNodeTemplate is used to update each node based on employee data.

Source

Preview

index.js

index.html

ej.diagrams.Diagram.Inject(ej.diagrams.DataBinding, ej.diagrams.HierarchicalTree);
 
   var data = [
	{ Name: "Elizabeth", Role: "Director" },
	{ Name: "Christina", ReportingPerson: "Elizabeth", Role: "Manager" },
	{ Name: "Yoshi", ReportingPerson: "Christina", Role: "Lead" },
	{ Name: "Philip", ReportingPerson: "Christina", Role: "Lead" },
	{ Name: "Yang", ReportingPerson: "Elizabeth", Role: "Manager" },
	{ Name: "Roland", ReportingPerson: "Yang", Role: "Lead" },
	{ Name: "Yvonne", ReportingPerson: "Yang", Role: "Lead" }
];

var codes  = {
	Director: "rgb(0, 139,139)",
	Manager: "rgb(30, 30,113)",
	Lead: "rgb(0, 100,0)"
};

function getNodeTemplate(node) {
        node.annotations[0].content = node.data.Name;
        node.style.fill = codes[node.data.Role];
    }
    
var items = new ej.data.DataManager(data, new ej.data.Query().take(7));
var diagram = new ej.diagrams.Diagram({
    width: '100%', height: '350px',
    mode: 'SVG', snapSettings: { constraints: ej.diagrams.SnapConstraints.None },
     dataSourceSettings: {
            id: 'Name', parentId: 'ReportingPerson', dataManager: items
        },
       layout: {
            type: 'OrganizationalChart',
            margin: { left: 10, top: 10 },
            horizontalSpacing: 50,
            verticalSpacing: 50,
            orientation: 'TopToBottom',
            getLayoutInfo: function (node, tree) {
                if (!tree.hasSubTree) {
                    tree.orientation = 'Vertical';
                    tree.type = 'Alternate';
                }
            }
        },
            getNodeDefaults: function (obj, diagram) {
            obj.height = 30;
            obj.width = 70;
            obj.shape = { type: 'Basic', shape: 'Rectangle' };
            obj.annotations = [{
                    id: "label1",
                    style: {
                        fontSize: 11,
                        bold: true,
                        fontFamily: "Segoe UI",
                        color: "white"
                    }
                }];
            return obj;
        },
        getConnectorDefaults: function (connector, diagram) {
            connector.targetDecorator.shape = 'Arrow';
            connector.type = 'Orthogonal';
            return connector;
        },
        setNodeTemplate: function (node) {
            return getNodeTemplate(node);
        }
        
});
diagram.appendTo('#element');

<!DOCTYPE html><html lang="en"><head>
            
    <title>EJ2 Diagram</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="//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-splitbuttons/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-diagrams/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-navigations/styles/fabric.css" rel="stylesheet">
    
<script src="https://cdn.syncfusion.com/ej2/21.2.3/dist/ej2.min.js" type="text/javascript"></script>
</head>

<body>
    
    <div id="container">
        <div id="element"></div>
    </div>


<script>
var ele = document.getElementById('container');
if(ele) {
    ele.style.visibility = "visible";
 }   
        </script>
<script src="index.js" type="text/javascript"></script>
</body></html>

Contents

Component Initialization
Using local script and style references in a HTML page
Using CDN link for script and style reference
Flow Diagram
Create and add node
Connect Nodes
Complete flow diagram
Automatic organization chart
Business object Employee information
Map data source
Visualize employee

Contents

Component Initialization
Using local script and style references in a HTML page
Using CDN link for script and style reference
Flow Diagram
Create and add node
Connect Nodes
Complete flow diagram
Automatic organization chart
Business object Employee information
Map data source
Visualize employee

Please provide additional information

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