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Backend API
import React, { useCallback, useState } from 'react';
import FileUploader, { FileUploaderTypes } from 'devextreme-react/file-uploader';
function getValueInKb(value: number) {
return `${(value / 1024).toFixed(0)}kb`;
}
export default function App() {
const [chunks, setChunks] = useState([]);
const onUploadProgress = useCallback((e: FileUploaderTypes.ProgressEvent) => {
const chunk = {
segmentSize: e.segmentSize,
bytesLoaded: e.bytesLoaded,
bytesTotal: e.bytesTotal,
};
setChunks([...chunks, chunk]);
}, [chunks, setChunks]);
const onUploadStarted = useCallback(() => {
setChunks([]);
}, [setChunks]);
return (
<React.Fragment>
<FileUploader
name="file"
accept="image/*"
uploadUrl="https://js.devexpress.com/Demos/WidgetsGalleryDataService/api/ChunkUpload"
chunkSize={200000}
onUploadStarted={onUploadStarted}
onProgress={onUploadProgress}
/>
<span className="note">Allowed file extensions: <span>.jpg, .jpeg, .gif, .png</span>.</span>
<span className="note">Maximum file size: <span>4 MB.</span></span>
<div className="chunk-panel">
{
chunks.map((c, i) => (
<div key={i}>
<span>Chunk size:</span>
<span className="segment-size">{getValueInKb(c.segmentSize)}</span>
<span>, Uploaded:</span>
<span className="loaded-size">{getValueInKb(c.bytesLoaded)}</span>
<span>/</span>
<span className="total-size">{getValueInKb(c.bytesTotal)}</span>
</div>
))
}
</div>
</React.Fragment>
);
}
import React, { useCallback, useState } from 'react';
import FileUploader from 'devextreme-react/file-uploader';
function getValueInKb(value) {
return `${(value / 1024).toFixed(0)}kb`;
}
export default function App() {
const [chunks, setChunks] = useState([]);
const onUploadProgress = useCallback(
(e) => {
const chunk = {
segmentSize: e.segmentSize,
bytesLoaded: e.bytesLoaded,
bytesTotal: e.bytesTotal,
};
setChunks([...chunks, chunk]);
},
[chunks, setChunks],
);
const onUploadStarted = useCallback(() => {
setChunks([]);
}, [setChunks]);
return (
<React.Fragment>
<FileUploader
name="file"
accept="image/*"
uploadUrl="https://js.devexpress.com/Demos/WidgetsGalleryDataService/api/ChunkUpload"
chunkSize={200000}
onUploadStarted={onUploadStarted}
onProgress={onUploadProgress}
/>
<span className="note">
Allowed file extensions: <span>.jpg, .jpeg, .gif, .png</span>.
</span>
<span className="note">
Maximum file size: <span>4 MB.</span>
</span>
<div className="chunk-panel">
{chunks.map((c, i) => (
<div key={i}>
<span>Chunk size:</span>
<span className="segment-size">{getValueInKb(c.segmentSize)}</span>
<span>, Uploaded:</span>
<span className="loaded-size">{getValueInKb(c.bytesLoaded)}</span>
<span>/</span>
<span className="total-size">{getValueInKb(c.bytesTotal)}</span>
</div>
))}
</div>
</React.Fragment>
);
}
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>
.chunk-panel {
width: 505px;
height: 165px;
overflow-y: auto;
padding: 18px;
margin-top: 40px;
background-color: rgba(191, 191, 191, 0.15);
}
.segment-size,
.loaded-size {
margin-left: 3px;
color: var(--dx-color-primary);
}
.total-size {
color: var(--dx-color-primary);
}
.note {
display: block;
font-size: 10pt;
color: #484848;
margin-left: 9px;
}
.note > span {
font-weight: 700;
}