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Customize progress bar theme and sizing

In default, the Progress bar will appear based on the theme stylings and dimensions. You can customize progress bar stylings through custom CSS or Event functions.

Here below sample demonstrates customize the progress bar Stylings using beforeOpen Event.

Source
Preview
index.tsx
index.html
App.css.jsx
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import App  from './App';

ReactDOM.render(<App />, document.getElementById('element'));
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Essential JS 2 React Accordion Sample</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/material.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>
        #multiToast>div>button {
            margin-top: 20px;
        }

        #customChoose {
            display: none;
        }

        #toast_full_Position table {
            width: 100%;
        }

        #toast_full_width,
        #toast_full_Position {
            padding-top: 20px;
            margin: 20px;
        }

        #toast_full_width table td>div,
        #toast_full_Position table td>div {
            padding: 25px 0 0 0;
        }

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

        #elementTarget .e-toast-message {
            width: 100%;
        }

        .progress {
            height: 20px;
            position: relative;
            margin: 20px 0 20px 0;
            background: #555;
            -moz-border-radius: 25px;
            -webkit-border-radius: 25px;
            border-radius: 25px;
            box-shadow: inset 0 -1px 1px rgba(255, 255, 255, 0.3);
        }

        .progress span {
            background-color: #f0a3a3;
            background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0, #f0a3a3), color-stop(1, #f42323));
            display: block;
            height: 100%;
            border-radius: 10px;
            width: 50%;
            position: relative;
            overflow: hidden;
        }

        .progress span::after {
            background-image: -webkit-gradient(linear, 0 0, 100% 100%,
            color-stop(.25, rgba(255, 255, 255, .2)),
            color-stop(.25, transparent), color-stop(.5, transparent),
            color-stop(.5, rgba(255, 255, 255, .2)),
            color-stop(.75, rgba(255, 255, 255, .2)),
            color-stop(.75, transparent), to(transparent));
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            bottom: 0;
            right: 0;
            background-size: 50px 50px;
            -webkit-animation: moveAnimate 2s linear infinite;
            overflow: hidden;
        }

        @-webkit-keyframes moveAnimate {
            0% {
                background-position: 0 0;
            }
            100% {
                background-position: 50px 50px;
            }
        }

        #elementToastTime {
            text-align: center;
        }

        #elementToastTime img {
            width: 100px;
            height: 100px;
            border-radius: 50%;
        }

        #elementToastTime .e-toast-message {
            width: inherit;
        }


        body> #template_toast .e-toast {
            width: 400px !important;
        }


        #template_toast .horizontal-align {
            margin: 10px 0;
        }

        #template_toast .horizontal-align .toast-content .toast-message {
            opacity: 0.4;
        }

        #template_toast .horizontal-align .toast-content {
            display: inline-flex;
            flex: 1;
            flex-direction: column;
            margin-left: 10px;
        }
    </style>
</head>

<body>
    <div id='root'>
        <div id='loader'>Loading....</div>
    </div>
    <div id='templateToast' style="display: none;color:red"> System affected by virus !!! </div>
</body>
<script id="template_toast_ele" type="text/x-template">
    <div id='template_toast' style="display: none">
        <div class="horizontal-align">
            <div class='toast-content'>
                <div class='toast-title'>
                    Weekend Alarm
                </div>
                <div class='toast-message'> With traffic, its likely to take 45 minutes to get to jenny's 24th Birthday Bash at Hillside Bar, 454 E.
                    Olive Way by 10:00PM </div>
            </div>
        </div>
        <img src="http://npmci.syncfusion.com/development/demos/src/toast/resource/map.jpg" width="100%" height="70%">
    </div>
</script>

</html>
import { ButtonComponent } from '@syncfusion/ej2-react-buttons';
import { DropDownListComponent } from '@syncfusion/ej2-react-dropdowns';
import { ToastComponent } from '@syncfusion/ej2-react-notifications';
import * as React from "react";
import './App.css';
class App extends React.Component {
    constructor() {
        super(...arguments);
        this.timeOutDelay = 600;
        this.position = { X: 'Right', Y: 'Bottom' };
        this.style = { paddingTop: '20px' };
        this.progressBarColor = ['Red', 'Cyan', 'Blue', 'Yellow', 'Pink'];
    }
    toastCreated() {
        this.toastInstance.show();
    }
    toastShow() {
        setTimeout(() => {
            this.toastInstance.show();
        }, this.timeOutDelay);
    }
    btnClick() {
        this.toastShow();
    }
    onBeforeOpen(e) {
        const progress = e.element.querySelector('.e-toast-progress');
        progress.style.height = (document.getElementById('progressHeight').value + 'px').toString();
        progress.style.backgroundColor = this.dropDownInstance.value.toString();
    }
    valueChange() {
        const progressElements = this.toastInstance.element.querySelectorAll('.e-toast-progress');
        progressElements.forEach((ele) => {
            ele.style.backgroundColor = this.dropDownInstance.value.toString();
        });
    }
    render() {
        return (<div>
        <ButtonComponent cssClass="e-primary" onClick={this.btnClick = this.btnClick.bind(this)}> Show Toast </ButtonComponent>
        <div className='e-row' style={this.style}>
          <div className='e-float-input'>
            <input type='text' className='e-input' id='progressHeight' defaultValue={'4'} required={true}/>
            <span className='e-float-line'/>
            <label className="e-float-text">ProgressBar Height</label>
          </div>
        </div>
        <div className='e-row' style={this.style}>
          <div className="col-xs-6 col-sm-6 col-lg-6 col-md-6">
            <label>Progress Bar</label>
          </div>
          <div className="col-xs-6 col-sm-6 col-lg-6 col-md-6">
            <DropDownListComponent ref={drop => this.dropDownInstance = drop} dataSource={this.progressBarColor} placeholder="Select a ProgressBar Color" change={this.valueChange = this.valueChange.bind(this)} index='0'/>
          </div>
        </div>
        <ToastComponent ref={toast => this.toastInstance = toast} showProgressBar='true' title='Matt sent you a friend request' content='Hey, wanna dress up as wizards and ride our hoverboards?' position={this.position} beforeOpen={this.onBeforeOpen = this.onBeforeOpen.bind(this)} created={this.toastCreated = this.toastCreated.bind(this)}/>
      </div>);
    }
}
;
export default App;