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Customize the Events Dynamically Before it Renders on UI

The eventRendered event will be triggered before rendering the appointments on Schedule where it can be customized. In the below demo, custom field CategoryColor is added to the appointment collection and based on certain condition, appointment background color is changed with CategoryColor field value.

Source
Preview
index.jsx
index.tsx
index.html
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { ScheduleComponent, Day, Week, WorkWeek, Month, Agenda, Inject } from '@syncfusion/ej2-react-schedule';
import { extend } from '@syncfusion/ej2-base';
import { scheduleData } from './datasource';
class App extends React.Component {
    constructor() {
        super(...arguments);
        this.data = extend([], scheduleData, null, true);
    }
    onEventRendered(args) {
        if (args.data.StartTime.getDate() === 11 || args.data.StartTime.getDate() === 15) {
            args.element.style.backgroundColor = args.data.CategoryColor;
        }
    }
    render() {
        return <ScheduleComponent width='100%' height='500px' selectedDate={new Date(2018, 1, 15)} eventSettings={{ dataSource: this.data }} eventRendered={this.onEventRendered.bind(this)}>
        <Inject services={[Day, Week, WorkWeek, Month, Agenda]}/>
        </ScheduleComponent>;
    }
}
;
ReactDOM.render(<App />, document.getElementById('schedule'));
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import {
  ScheduleComponent, Day, Week, WorkWeek, Month, Agenda, Inject,
EventRenderedArgs } from '@syncfusion/ej2-react-schedule';
import { extend } from '@syncfusion/ej2-base';
import { scheduleData } from './datasource';

class App extends React.Component<{}, {}>{
    private data: Object[] = extend([], scheduleData, null, true) as Object[];
    private onEventRendered(args: EventRenderedArgs): void {
        if(args.data.StartTime.getDate()===11 || args.data.StartTime.getDate() === 15){
            (args.element as HTMLElement).style.backgroundColor = args.data.CategoryColor;
        }
    }
    render() {
        return <ScheduleComponent width= '100%' height='500px' selectedDate=
        { new Date(2018, 1, 15) }eventSettings={ { dataSource: this.data } }
        eventRendered={this.onEventRendered.bind(this)}>
        <Inject services={[Day, Week, WorkWeek, Month, Agenda]} />
        </ScheduleComponent>
    }
};
ReactDOM.render(<App />, document.getElementById('schedule'));
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Syncfusion React Schedule</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Essential JS 2 for React Components" />
    <meta name="author" content="Syncfusion" />
    <link href="//cdn.syncfusion.com/ej2/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-react-buttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-react-calendars/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-react-dropdowns/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-react-inputs/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-react-navigations/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-react-popups/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-react-schedule/styles/material.css" rel="stylesheet" />
    <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
     <style>
        #loader {
            color: #008cff;
            height: 40px;
            left: 45%;
            position: absolute;
            top: 45%;
            width: 30%;
        }
    </style>
</head>

<body>
        <div id='schedule'>
            <div id='loader'>Loading....</div>
        </div>
</body>

</html>