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Backend API
import React, { useCallback, useState } from 'react';
import { Button } from 'devextreme-react/button';
import { LoadIndicator } from 'devextreme-react/load-indicator';
export default function App() {
const [loadIndicatorVisible, setLoadIndicatorVisible] = useState(false);
const [buttonText, setButtonText] = useState('Send');
const handleClick = useCallback(() => {
setLoadIndicatorVisible(true);
setButtonText('Sending');
setTimeout(() => {
setLoadIndicatorVisible(false);
setButtonText('Send');
}, 2000);
}, [setLoadIndicatorVisible, setButtonText]);
return (
<div className="form">
<div className="label">Custom size</div>
<div className="indicators">
<LoadIndicator id="small-indicator" height={20} width={20} />
<LoadIndicator id="medium-indicator" height={40} width={40} />
<LoadIndicator id="large-indicator" height={60} width={60} />
</div>
<div className="label">Custom image</div>
<LoadIndicator id="image-indicator" indicatorSrc="../../../../images/Loading.gif" />
<div className="label">Using with other widgets</div>
<Button
id="button"
width={180}
height={40}
onClick={handleClick}
>
<LoadIndicator className="button-indicator" visible={loadIndicatorVisible} />
<span className="dx-button-text">{buttonText}</span>
</Button>
</div>
);
}
import React, { useCallback, useState } from 'react';
import { Button } from 'devextreme-react/button';
import { LoadIndicator } from 'devextreme-react/load-indicator';
export default function App() {
const [loadIndicatorVisible, setLoadIndicatorVisible] = useState(false);
const [buttonText, setButtonText] = useState('Send');
const handleClick = useCallback(() => {
setLoadIndicatorVisible(true);
setButtonText('Sending');
setTimeout(() => {
setLoadIndicatorVisible(false);
setButtonText('Send');
}, 2000);
}, [setLoadIndicatorVisible, setButtonText]);
return (
<div className="form">
<div className="label">Custom size</div>
<div className="indicators">
<LoadIndicator
id="small-indicator"
height={20}
width={20}
/>
<LoadIndicator
id="medium-indicator"
height={40}
width={40}
/>
<LoadIndicator
id="large-indicator"
height={60}
width={60}
/>
</div>
<div className="label">Custom image</div>
<LoadIndicator
id="image-indicator"
indicatorSrc="../../../../images/Loading.gif"
/>
<div className="label">Using with other widgets</div>
<Button
id="button"
width={180}
height={40}
onClick={handleClick}
>
<LoadIndicator
className="button-indicator"
visible={loadIndicatorVisible}
/>
<span className="dx-button-text">{buttonText}</span>
</Button>
</div>
);
}
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.tsx';
ReactDOM.render(
<App />,
document.getElementById('app'),
);
window.exports = window.exports || {};
window.config = {
transpiler: 'ts',
typescriptOptions: {
module: 'system',
emitDecoratorMetadata: true,
experimentalDecorators: true,
jsx: 'react',
},
meta: {
'react': {
'esModule': true,
},
'typescript': {
'exports': 'ts',
},
'devextreme/time_zone_utils.js': {
'esModule': true,
},
'devextreme/localization.js': {
'esModule': true,
},
'devextreme/viz/palette.js': {
'esModule': true,
},
},
paths: {
'npm:': 'https://unpkg.com/',
},
defaultExtension: 'js',
map: {
'ts': 'npm:plugin-typescript@4.2.4/lib/plugin.js',
'typescript': 'npm:typescript@4.2.4/lib/typescript.js',
'react': 'npm:react@17.0.2/umd/react.development.js',
'react-dom': 'npm:react-dom@17.0.2/umd/react-dom.development.js',
'prop-types': 'npm:prop-types@15.8.1/prop-types.js',
'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js',
'luxon': 'npm:luxon@1.28.1/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'devextreme': 'npm:devextreme@24.1.7/cjs',
'devextreme-react': 'npm:devextreme-react@24.1.7/cjs',
'jszip': 'npm:jszip@3.10.1/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@1.7.1/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.2.13/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@4.1.56/dist/dx-gantt.js',
'@devextreme/runtime': 'npm:@devextreme/runtime@3.0.13',
'inferno': 'npm:inferno@7.4.11/dist/inferno.min.js',
'inferno-compat': 'npm:inferno-compat/dist/inferno-compat.min.js',
'inferno-create-element': 'npm:inferno-create-element@7.4.11/dist/inferno-create-element.min.js',
'inferno-dom': 'npm:inferno-dom/dist/inferno-dom.min.js',
'inferno-hydrate': 'npm:inferno-hydrate@7.4.11/dist/inferno-hydrate.min.js',
'inferno-clone-vnode': 'npm:inferno-clone-vnode/dist/inferno-clone-vnode.min.js',
'inferno-create-class': 'npm:inferno-create-class/dist/inferno-create-class.min.js',
'inferno-extras': 'npm:inferno-extras/dist/inferno-extras.min.js',
'devextreme-cldr-data': 'npm:devextreme-cldr-data@1.0.3',
// SystemJS plugins
'plugin-babel': 'npm:systemjs-plugin-babel@0.0.25/plugin-babel.js',
'systemjs-babel-build': 'npm:systemjs-plugin-babel@0.0.25/systemjs-babel-browser.js',
// Prettier
'prettier/standalone': 'npm:prettier@2.8.8/standalone.js',
'prettier/parser-html': 'npm:prettier@2.8.8/parser-html.js',
},
packages: {
'devextreme': {
defaultExtension: 'js',
},
'devextreme-react': {
main: 'index.js',
},
'devextreme/events/utils': {
main: 'index',
},
'devextreme/localization/messages': {
format: 'json',
defaultExtension: 'json',
},
'devextreme/events': {
main: 'index',
},
'es6-object-assign': {
main: './index.js',
defaultExtension: 'js',
},
},
packageConfigPaths: [
'npm:@devextreme/*/package.json',
'npm:@devextreme/runtime@3.0.13/inferno/package.json',
],
babelOptions: {
sourceMaps: false,
stage0: true,
react: true,
},
};
System.config(window.config);
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.js';
ReactDOM.render(<App />, document.getElementById('app'));
<!DOCTYPE html>
<html lang="en">
<head>
<title>DevExtreme Demo</title>
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=5.0" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/24.1.7/css/dx.light.css" />
<link rel="stylesheet" type="text/css" href="styles.css" />
<script src="https://unpkg.com/core-js@2.6.12/client/shim.min.js"></script>
<script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script>
<script type="text/javascript" src="config.js"></script>
<script type="text/javascript">
System.import("./index.tsx");
</script>
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="app"></div>
</div>
</body>
</html>
.form {
padding: 10px 0 0 10px;
}
.label {
margin-bottom: 10px;
font-size: 16px;
}
.label:not(:first-child) {
margin-top: 30px;
}
#small-indicator,
#medium-indicator,
#large-indicator {
vertical-align: middle;
margin-right: 10px;
}
#button,
#button .dx-button-content {
padding: 0;
}
#button .button-indicator {
height: 32px;
width: 32px;
display: inline-block;
vertical-align: middle;
margin-right: 5px;
}
.indicators {
display: flex;
align-items: center;
}
Specify Dimensions
LoadIndicator allows you to specify its dimensions. Set the height and width properties to the size you need. In this demo, the first three components have different sizes.
Apply a Custom Indicator
If you want to apply a custom indicator, assign the path to a new image to the indicatorSrc property. In this demo, the fourth LoadIndicator displays a custom animated GIF.
Integrate LoadIndicator into Other Components
You can use LoadIndicator within other UI components. In this demo, the indicator appears in the Button component when a user clicks the button. To show and hide LoadIndicator, use the visible property.