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Change the text content and styles of the ProgressButton during progress

You can change the text content and styles of the ProgressButton during progress by changing the text content and the cssClass property at the begin and end events.

Source
Preview
app.tsx
index.html
import * as React from 'react';
import * as ReactDom from 'react-dom';
import { ProgressButtonComponent } from '@syncfusion/ej2-react-splitbuttons';

class App extends React.Component<{}, {}> {
  constructor() {
    this.state = { content: 'Upload', cssClass: 'e-hide-spinner' };
  }

  private begin(): void {
      this.setState({ content: 'Uploading...', cssClass: 'e-hide-spinner e-info' });
  }

  private end(): void {
      this.setState({ content: 'Success', cssClass: 'e-hide-spinner e-success' });
      setTimeout(() => {
          this.setState({ content: 'Upload', cssClass: 'e-hide-spinner' });
      }, 500)
  }

  render() {
    return (
      <ProgressButtonComponent content={this.state.content} enableProgress cssClass={this.state.cssClass} duration={4000} begin={this.begin.bind(this)} end={this.end.bind(this)}></ProgressButtonComponent>
    );
  }
}
ReactDom.render(<App />, document.getElementById('progress-button'));
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Syncfusion React Progress Button</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="This demo for React Progress button has progress indicator and spinner. It supports texts, icons, styles, sizes, positions, and its customization." />
    <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-buttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
    <link href="index.css" rel="stylesheet" />
    <link href="spinner.css" rel="stylesheet" />
    <link href="progress.css" rel="stylesheet" />
    <link href="icon.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
        <div id='progress-button'>
            <div id='loader'>Loading....</div>
        </div>
</body>

</html>
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