Tools in EJ2 TypeScript Diagram control

4 Dec 202424 minutes to read

The tools in the diagram control can perform various actions such as selecting, panning, and drawing. These tools are explained below.

Select: Allows you to choose specific elements within the diagram.
Pan: Enables you to move the view of the diagram to different areas without altering the elements.
Draw: Provides the ability to draw new shapes, connectors, on the diagram surface.

These tools are essential for creating, editing, and navigating complex diagrams efficiently.

Drawing tools

Drawing tool allows you to draw any kind of node/connector during runtime by clicking and dragging on the diagram page.

Draw nodes

To draw a shape, set the JSON of that shape to the drawingObject property of the diagram and activate the drawing tool by using the tool property. The following code example illustrates how to draw a rectangle at runtime:

index.ts
index.html
import { Diagram, NodeModel, DiagramTools } from '@syncfusion/ej2-diagrams';
let diagram: Diagram = new Diagram({
  width: '100%',
  height: 700,
  //Drawing object to draw basic rectangle
  drawingObject: { shape: { type: 'Basic', shape: 'Rectangle' } } as NodeModel,
  //To maintain the drawing tool continuously
  tool: DiagramTools.ContinuousDraw,
});
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" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-diagrams/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-navigations/styles/fabric.css" rel="stylesheet" />
    <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>

The following code example illustrates how to draw a path shape.

index.ts
index.html
import { Diagram, DiagramTools } from '@syncfusion/ej2-diagrams';
let diagram: Diagram = new Diagram({
  width: '100%',
  height: 700,
  //Drawing object to draw path shape
  drawingObject: {
    id: 'Path',
    style: { fill: '#fbe172' },
    annotations: [
      {
        content: 'Path',
      },
    ],
    shape: {
      type: 'Path',
      data: 'M13.560 67.524 L 21.941 41.731 L 0.000 25.790 L 27.120 25.790 L 35.501 0.000 L 43.882 25.790 L 71.000 25.790 L 49.061 41.731 L 57.441 67.524 L 35.501 51.583 z',
    },
  },
  //To maintain the drawing tool continuously
  tool: DiagramTools.ContinuousDraw,
});
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" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-diagrams/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-navigations/styles/fabric.css" rel="stylesheet" />
    <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>

Text Nodes

Similarly, you can draw a text node by setting the type of shape as ‘Text’ in the drawingObject property. The text type node contains a property called content, which specifies the text within the node. You can add the content to the text node once you finish drawing the node. Here is how you can draw a text node at runtime:

index.ts
index.html
import { Diagram, DiagramTools } from '@syncfusion/ej2-diagrams';
let diagram: Diagram = new Diagram({
  width: '100%',
  height: 700,
  //Drawing object to draw Text node
  drawingObject: {
    shape: { type: 'Text' },
  },
  //To maintain the drawing tool continuously
  tool: DiagramTools.ContinuousDraw,
});
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" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-diagrams/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-navigations/styles/fabric.css" rel="stylesheet" />
    <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>

Draw Connectors

To draw connector, set the JSON of that connector to the drawingObject property of the diagram. The drawing tool can be activated by using the tool property. The following code example illustrates how to draw different types of connector using drawing tool.

index.ts
index.html
import {
    Diagram,
    DiagramTools,
    ConnectorModel,
  } from '@syncfusion/ej2-diagrams';
  let diagram: Diagram = new Diagram({
    width: '100%',
    height: 700,
    //Drawing object to draw connector
    drawingObject: {
      id: 'connector1',
      type: 'Straight',
    },
    //To maintain the drawing tool continuously
    tool: DiagramTools.ContinuousDraw,
  });
  diagram.appendTo('#element');
  //To choose different connector type to draw
  (document.getElementById('connectorType') as HTMLInputElement).onchange = (args: any) => {
    let type = args.target.value;
    (diagram.drawingObject as ConnectorModel).type = type;
    diagram.dataBind();
  };
<!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" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-diagrams/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-navigations/styles/fabric.css" rel="stylesheet" />
    <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'>
        <label>Connector type</label>
        <select id="connectorType">
          <option value="Straight">Straight</option>
          <option value="Orthogonal">Orthogonal</option>
          <option value="Bezier">Bezier</option>
        </select>
        <div id='element'></div>
    </div>
</body>

</html>

Polygon shape

The diagram allows you to create polygon shapes by clicking and moving the mouse at runtime on the diagram page. This interactive feature enables users to define custom shapes with multiple sides by specifying points directly on the diagram canvas.

To draw a polygon shape, you need to set the drawingObject property with the appropriate JSON configuration for a polygon. This includes specifying the type as ‘Polygon’.

The following code illustrates how to draw a polygon shape at runtime:

index.ts
index.html
import { Diagram, DiagramTools } from '@syncfusion/ej2-diagrams';
let diagram: Diagram = new Diagram({
  width: '100%',
  height: 700,
  //Drawing object to draw polygon shape
  drawingObject: {
    shape: { type: 'Basic', shape: 'Polygon' },
  },
  //To activate the drawing tool once
  tool: DiagramTools.DrawOnce,
});
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" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-diagrams/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-navigations/styles/fabric.css" rel="stylesheet" />
    <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>

Polygon drawing

Polyline Connector

The diagram control enables users to create polyline connectors interactively by clicking and dragging the mouse on the diagram canvas at runtime. It allows creating polyline segments with straight lines and angled vertices at control points directly within the diagram interface.

To draw a polyline connector, set the type of the drawingObject as ‘Polyline’.

The following code illustrates how to draw a Polyline connector at runtime:

index.ts
index.html
import {
    Diagram,
    DiagramTools,
    ConnectorEditing,
    ConnectorModel,
    ConnectorConstraints,
  } from '@syncfusion/ej2-diagrams';
  Diagram.Inject(ConnectorEditing);
  let diagram: Diagram = new Diagram({
    width: '100%',
    height: 700,
    //Drawing object to draw polyline connector
    drawingObject: { id: 'connector1', type: 'Polyline' },
    //To activate the drawing tool once
    tool: DiagramTools.DrawOnce,
    getConnectorDefaults: function (obj: ConnectorModel) {
      //To activate the visibility of segment thumb
      obj.constraints =
        ConnectorConstraints.Default | ConnectorConstraints.DragSegmentThumb;
    },
  });
  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" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-diagrams/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-navigations/styles/fabric.css" rel="stylesheet" />
    <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>

The segments of a polyline connector can be adjusted at runtime by dragging the segment thumb, as shown in the image below. To enable segment editing, you should set the DragSegmentThumb constraint for the connector.

Polyline connector drawing

NOTE

To make the segment thumb visible, inject the ConnectorEditing module into the diagram.

Freehand Drawing

The diagram supports free-hand drawing, allowing users to draw anything independently on the diagram page. Free-hand drawing is enabled by setting the type of the drawingObject property to ‘Freehand’.

The following code illustrates how to perform freehand drawing:

index.ts
index.html
import {
    Diagram,
    DiagramTools,
    ConnectorEditing,
    ConnectorModel,
    ConnectorConstraints,
  } from '@syncfusion/ej2-diagrams';
  //To activate the visibility of segment thumbs
  Diagram.Inject(ConnectorEditing);
  let diagram: Diagram = new Diagram({
    width: '100%',
    height: 700,
    //Drawing object to draw Freehand connector
    drawingObject: { id: 'connector1', type: 'Freehand' },
    //To activate the drawing tool once
    tool: DiagramTools.DrawOnce,
    getConnectorDefaults: function (obj: ConnectorModel) {
      //To activate the segment editing
      obj.constraints =
        ConnectorConstraints.Default | ConnectorConstraints.DragSegmentThumb;
    },
  });
  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" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-diagrams/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-navigations/styles/fabric.css" rel="stylesheet" />
    <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>

The segments of a freehand connector can be adjusted at runtime by dragging the segment thumb, as shown in the image below. To enable segment editing, you should set the DragSegmentThumb constraint for the connector.

Freehand connector drawing

Tool selection

There are some functionalities that can be achieved by clicking and dragging on the diagram surface. They are as follows.

Draw selection rectangle: MultipleSelect tool
Pan the diagram: ZoomPan tool
Draw nodes/connectors: DrawOnce/ContinuousDraw tool

Since these behaviors are distinct, only one can be active at a time based on the selected tool. When multiple tools are applied, precedence is determined as follows:

Precedence	Tools	Description
1st	ContinuesDraw	Allows you to draw the nodes or connectors continuously. Once it is activated, you cannot perform any other interaction in the diagram.
2nd	DrawOnce	Allows you to draw a single node or connector. Once you complete the DrawOnce action, SingleSelect, and MultipleSelect tools are automatically enabled.
3rd	ZoomPan	Allows you to pan the diagram. When you enable both the SingleSelect and ZoomPan tools, you can perform the basic interaction as the cursor hovers node/connector. Panning is enabled when cursor hovers the diagram.
4th	MultipleSelect	Allows you to select multiple nodes and connectors. If both the MultipleSelect and ZoomPan tools are enabled, the rubber band selection (click and drag to select) is disabled when hovering over the diagram. However, panning is enabled while hovering over the diagram. To select multiple nodes, hold down the CTRL key and click on each node you want to select. Similarly, to unselect a node that is already selected, hold down the CTRL key and click on the node again.
5th	SingleSelect	Allows you to select individual nodes or connectors.
6th	None	Disables all tools.

These tools provide flexibility and functionality for creating and interacting with elements within the diagram interface.

Zoom pan tool

To activate panning mode set the tool property of the diagram as ZoomPan. The following code illustrates how to enable Zoom pan in the diagram

index.ts
index.html
import {
    Diagram,
    ConnectorModel,
    DiagramTools,
    NodeModel,
  } from '@syncfusion/ej2-diagrams';
  let nodes: NodeModel[] = [
    {
      id: 'Start',
      width: 140,
      height: 50,
      offsetX: 100,
      offsetY: 100,
      annotations: [
        {
          id: 'label1',
          content: 'Start',
        },
      ],
      shape: {
        type: 'Flow',
        shape: 'Terminator',
      },
    },
    {
      id: 'Init',
      width: 140,
      height: 50,
      offsetX: 300,
      offsetY: 300,
      annotations: [
        {
          id: 'label2',
          content: 'End',
        },
      ],
      shape: {
        type: 'Flow',
        shape: 'Process',
      },
    },
  ];
  let connectors: ConnectorModel = {
    // Name of the connector
    id: 'connector1',
    style: {
      strokeColor: '#6BA5D7',
      fill: '#6BA5D7',
      strokeWidth: 2,
    },
    targetDecorator: {
      style: {
        fill: '#6BA5D7',
        strokeColor: '#6BA5D7',
      },
    },
    // ID of the source and target nodes
    sourceID: 'Start',
    targetID: 'Init',
    type: 'Orthogonal',
  };
  let diagram: Diagram = new Diagram({
    width: '100%',
    height: 700,
    nodes: nodes,
    connectors: [connectors],
    //Activate zoom pan tool
    tool: DiagramTools.ZoomPan,
  });
  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" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-diagrams/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-navigations/styles/fabric.css" rel="stylesheet" />
    <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>

NOTE

Please note that panning the diagram is not possible when ‘multiplePage’ is set to false if any diagram object (node or connector) is outside the defined page break area.

Events

The elementDraw event is triggered whenever a node or connector is drawn using a drawing tool in the diagram. This event provides a way to capture and respond to actions when elements are created on the canvas.

index.ts
index.html
import {
    Diagram,
    NodeModel,
    DiagramTools,
    IElementDrawEventArgs,
  } from '@syncfusion/ej2-diagrams';
  let diagram: Diagram = new Diagram({
    width: '100%',
    height: 700,
    drawingObject: { shape: { type: 'Basic', shape: 'Rectangle' } } as NodeModel,
    tool: DiagramTools.DrawOnce,
    elementDraw: function elementDraw(args: IElementDrawEventArgs) {
      if (args.state === 'Completed') {
        // Example of alerting when a rectangle is drawn
        alert('Element draw - Rectangle');
      }
    },
  });
  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" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-diagrams/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/28.1.33/ej2-navigations/styles/fabric.css" rel="stylesheet" />
    <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>