Events in EJ2 TypeScript Timeline control

6 Mar 20255 minutes to read

This section describes the Timeline events that will be triggered when an appropriate actions are performed. The following events are available in the Timeline control.

Created

The Timeline control triggers the created event when the control rendering is completed.

import { Timeline, TimelineItemModel } from '@syncfusion/ej2-layouts';

const productLifecycle: TimelineItemModel[] = [
  { content: 'Planning' },
  { content: 'Developing' },
  { content: 'Testing' },
  { content: 'Launch' },
];

// Initializes the Timeline control
let timeline: Timeline = new Timeline({
  items: productLifecycle,
  created: () => {
    //your required action here 
  }
});

// Render initialized Timeline.
timeline.appendTo("#timeline");
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Essential JS 2 - Timeline</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" />
    <meta name="author" content="Syncfusion" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-layouts/styles/material.css" rel="stylesheet" />

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

    <!--system js reference and configuration-->
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <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' style="height: 300px;">
        <div id="timeline"></div>
    </div>
</body>

</html>
#container {
    visibility: hidden;
    margin-top: 30px;
    padding: 30px;
}

#loader {
    color: #008cff;
    height: 40px;
    left: 45%;
    position: absolute;
    top: 45%;
    width: 30%;
}

BeforeItemRender

The Timeline control triggers the beforeItemRender event before rendering each item.

import { Timeline, TimelineItemModel, TimelineRenderingEventArgs } from '@syncfusion/ej2-layouts';

const productLifecycle: TimelineItemModel[] = [
  { content: 'Planning' },
  { content: 'Developing' },
  { content: 'Testing' },
  { content: 'Launch' },
];

// Initializes the Timeline control
let timeline: Timeline = new Timeline({
  items: productLifecycle,
  beforeItemRender: (args: TimelineRenderingEventArgs) => {
    //your required action here 
  }
});

// Render initialized Timeline.
timeline.appendTo("#timeline");
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Essential JS 2 - Timeline</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" />
    <meta name="author" content="Syncfusion" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-layouts/styles/material.css" rel="stylesheet" />

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

    <!--system js reference and configuration-->
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <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' style="height: 300px;">
        <div id="timeline"></div>
    </div>
</body>

</html>
#container {
    visibility: hidden;
    margin-top: 30px;
    padding: 30px;
}

#loader {
    color: #008cff;
    height: 40px;
    left: 45%;
    position: absolute;
    top: 45%;
    width: 30%;
}