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Step Area with Gaps

The Step Area series uses perpendicular vertical and horizontal lines to connect data points and shades the area under these lines. If a point's value is null, the series draws a gap.

Only null point values result in gaps. undefined values are ignored. Multiple 0 values may look like a gap, but if series points are visible, you can see them in this gap. If you want to remove gaps caused by null values, enable the ignoreEmptyPoints property.

www.wikipedia.org
Backend API
import React from 'react'; import Chart, { ArgumentAxis, Series, CommonSeriesSettings, Label, Legend, Export, Point, } from 'devextreme-react/chart'; import { medalsInfo } from './data.ts'; function App() { return ( <Chart title="France Olympic Medals" dataSource={medalsInfo} id="chart"> <Series valueField="gold" name="Gold Medals" color="#ffd700" /> <Series valueField="silver" name="Silver Medals" color="#c0c0c0" /> <CommonSeriesSettings argumentField="year" type="steparea"> <Point visible={true} /> </CommonSeriesSettings> <ArgumentAxis> <Label format="decimal" /> </ArgumentAxis> <Export enabled={true} /> <Legend verticalAlignment="bottom" horizontalAlignment="center" /> </Chart> ); } export default App;
import React from 'react'; import Chart, { ArgumentAxis, Series, CommonSeriesSettings, Label, Legend, Export, Point, } from 'devextreme-react/chart'; import { medalsInfo } from './data.js'; function App() { return ( <Chart title="France Olympic Medals" dataSource={medalsInfo} id="chart" > <Series valueField="gold" name="Gold Medals" color="#ffd700" /> <Series valueField="silver" name="Silver Medals" color="#c0c0c0" /> <CommonSeriesSettings argumentField="year" type="steparea" > <Point visible={true} /> </CommonSeriesSettings> <ArgumentAxis> <Label format="decimal" /> </ArgumentAxis> <Export enabled={true} /> <Legend verticalAlignment="bottom" horizontalAlignment="center" /> </Chart> ); } export default App;
import React from 'react'; import ReactDOM from 'react-dom'; import App from './App.tsx'; ReactDOM.render( <App />, document.getElementById('app'), );
export const medalsInfo = [{ year: 1904, gold: null, silver: null, }, { year: 1908, gold: 5, silver: 5, }, { year: 1912, gold: 7, silver: 4, }, { year: 1916, gold: null, silver: null, }, { year: 1920, gold: 9, silver: 19, }, { year: 1924, gold: 13, silver: 15, }, { year: 1928, gold: 6, silver: 10, }, { year: 1932, gold: 10, silver: 5, }, { year: 1936, gold: 7, silver: 6, }, { year: 1940, gold: null, silver: null, }, { year: 1944, gold: null, silver: null, }, { year: 1948, gold: 10, silver: 6, }, { year: 1952, gold: 6, silver: 6, }, { year: 1956, gold: 4, silver: 4, }, { year: 1960, gold: null, silver: 2, }, { year: 1964, gold: 1, silver: 8, }, { year: 1968, gold: 7, silver: 3, }, { year: 1972, gold: 2, silver: 4, }, { year: 1976, gold: 2, silver: 3, }, { year: 1980, gold: 6, silver: 5, }, { year: 1984, gold: 5, silver: 7, }, { year: 1988, gold: 6, silver: 4, }, { year: 1992, gold: 8, silver: 5, }, { year: 1996, gold: 15, silver: 7, }, { year: 2000, gold: 13, silver: 14, }, { year: 2004, gold: 11, silver: 9, }, { year: 2008, gold: 7, silver: 16, }, { year: 2012, gold: 11, silver: 11, }, { year: 2016, gold: 18, silver: 18, }];
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@24.1.3/cjs', 'devextreme-react': 'npm:devextreme-react@24.1.3/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@2.2.8/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'));
export const medalsInfo = [ { year: 1904, gold: null, silver: null, }, { year: 1908, gold: 5, silver: 5, }, { year: 1912, gold: 7, silver: 4, }, { year: 1916, gold: null, silver: null, }, { year: 1920, gold: 9, silver: 19, }, { year: 1924, gold: 13, silver: 15, }, { year: 1928, gold: 6, silver: 10, }, { year: 1932, gold: 10, silver: 5, }, { year: 1936, gold: 7, silver: 6, }, { year: 1940, gold: null, silver: null, }, { year: 1944, gold: null, silver: null, }, { year: 1948, gold: 10, silver: 6, }, { year: 1952, gold: 6, silver: 6, }, { year: 1956, gold: 4, silver: 4, }, { year: 1960, gold: null, silver: 2, }, { year: 1964, gold: 1, silver: 8, }, { year: 1968, gold: 7, silver: 3, }, { year: 1972, gold: 2, silver: 4, }, { year: 1976, gold: 2, silver: 3, }, { year: 1980, gold: 6, silver: 5, }, { year: 1984, gold: 5, silver: 7, }, { year: 1988, gold: 6, silver: 4, }, { year: 1992, gold: 8, silver: 5, }, { year: 1996, gold: 15, silver: 7, }, { year: 2000, gold: 13, silver: 14, }, { year: 2004, gold: 11, silver: 9, }, { year: 2008, gold: 7, silver: 16, }, { year: 2012, gold: 11, silver: 11, }, { year: 2016, gold: 18, silver: 18, }, ];
<!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/24.1.3/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>
#chart { height: 440px; width: 100%; }