React Charts - Client-Side Data Processing

import React from 'react';

import DataSource from 'devextreme/data/data_source';

import CustomStore from 'devextreme/data/custom_store';

import Chart, {

  ValueAxis,

  Label,

  Legend,

  Series,

  Size,

  Export,

  LoadingIndicator,

} from 'devextreme-react/chart';

import SelectBox from 'devextreme-react/select-box';

​

const temperatureLabel = { 'aria-label': 'Temperature' };

const temperature = [2, 4, 6, 8, 9, 10, 11];

const palette = ['#c3a2cc', '#b7b5e0', '#e48cba'];

let paletteIndex = 0;

const monthWeather = new DataSource({

  store: new CustomStore({

    load: () =>

      fetch('data/monthWeather.json')

        .then((e) => e.json())

        .catch(() => {

          throw new Error('Data Loading Error');

        }),

    loadMode: 'raw',

  }),

  filter: ['t', '>', '2'],

  paginate: false,

});

function customizeLabel(e) {

  return `${e.valueText}${'&#176C'}`;

}

function customizePoint() {

  const color = palette[paletteIndex];

  paletteIndex = paletteIndex === 2 ? 0 : paletteIndex + 1;

  return { color };

}

function changeTemperature(e) {

  monthWeather.filter(['t', '>', e.value]);

  monthWeather.load();

}

function App() {

  return (

    <div id="chart-demo">

      {monthWeather && (

        <Chart

          title="Temperature in Seattle: October 2017"

          dataSource={monthWeather}

          customizePoint={customizePoint}

        >

          <Size height={420} />

          <ValueAxis>

            <Label customizeText={customizeLabel} />

          </ValueAxis>

          <Series

            argumentField="day"

            valueField="t"

            type="bar"

          />

          <Legend visible={false} />

          <Export enabled={true} />

          <LoadingIndicator enabled={true} />

        </Chart>

      )}

      <div className="action">

        <div className="label">Choose a temperature threshold, &deg;C:</div>

        <SelectBox

          id="choose-temperature"

          dataSource={temperature}

          inputAttr={temperatureLabel}

          defaultValue={2}

          onValueChanged={changeTemperature}

        />

      </div>

    </div>

  );

}

export default App;

​

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,

    },

    'openai': {

      'esModule': true,

    },

  },

  paths: {

    'npm:': 'https://unpkg.com/',

    'bundles:': 'bundles/',

    'externals:': 'bundles/externals/',

  },

  defaultExtension: 'js',

  map: {

    'ts': 'npm:plugin-typescript@8.0.0/lib/plugin.js',

    'typescript': 'npm:typescript@4.2.4/lib/typescript.js',

    'jszip': 'npm:jszip@3.10.1/dist/jszip.min.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/prop-types.js',

    'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js',

    'luxon': 'npm:luxon@3.4.4/build/global/luxon.min.js',

    'es6-object-assign': 'npm:es6-object-assign',

    'devextreme': 'npm:devextreme@24.2.6/cjs',

    'devextreme-react': 'npm:devextreme-react@24.2.6/cjs',

    'devextreme-quill': 'npm:devextreme-quill@1.7.1/dist/dx-quill.min.js',

    'devexpress-diagram': 'npm:devexpress-diagram@2.2.15/dist/dx-diagram.js',

    'devexpress-gantt': 'npm:devexpress-gantt@4.1.60/dist/dx-gantt.js',

    '@devextreme/runtime': 'npm:@devextreme/runtime@3.0.12',

    '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/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/common/core/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@3.0.12/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'));

​

[

    { "day": "1", "t": 11 },

    { "day": "2", "t": 7 },

    { "day": "3", "t": 6 },

    { "day": "4", "t": 8 },

    { "day": "5", "t": 7 },

    { "day": "6", "t": 7 },

    { "day": "7", "t": 11 },

    { "day": "8", "t": 9 },

    { "day": "9", "t": 5 },

    { "day": "10", "t": 8 },

    { "day": "11", "t": 6 },

    { "day": "12", "t": 9 },

    { "day": "13", "t": 8 },

    { "day": "14", "t": 6 },

    { "day": "15", "t": 6 },

    { "day": "16", "t": 6 },

    { "day": "17", "t": 10 },

    { "day": "18", "t": 9 },

    { "day": "19", "t": 12 },

    { "day": "20", "t": 9 },

    { "day": "21", "t": 8 },

    { "day": "22", "t": 13 },

    { "day": "23", "t": 9 },

    { "day": "24", "t": 7 },

    { "day": "25", "t": 6 },

    { "day": "26", "t": 11 },

    { "day": "27", "t": 8 },

    { "day": "28", "t": 7 },

    { "day": "29", "t": 9 },

    { "day": "30", "t": 7 },

    { "day": "31", "t": 3 }

]

<!DOCTYPE html>

<html lang="en">

  <head>↔</head>

​

  <body class="dx-viewport">

    <div class="demo-container">

      <div id="app"></div>

    </div>

  </body>

</html>

​

.action {

  width: 330px;

  margin-top: 20px;

  display: flex;

  align-items: center;

  justify-content: space-between;

}

​

.action .dx-selectbox {

  width: 90px;

}

​