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    Area Charts

    Step Area with Gaps

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    This demo illustrates how the Chart widget treats points with null value.

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    <template> <dx-chart id="chart" :data-source="medalsInfo" title="France Olympic Medals" > <dx-series value-field="gold" name="Gold Medals" color="#ffd700" /> <dx-series value-field="silver" name="Silver Medals" color="#c0c0c0" /> <dx-common-series-settings argument-field="year" type="steparea" > <dx-point :visible="true"/> </dx-common-series-settings> <dx-argument-axis> <dx-label format="decimal"/> </dx-argument-axis> <dx-legend vertical-alignment="bottom" horizontal-alignment="center" /> <dx-export :enabled="true"/> </dx-chart> </template> <script> import DxChart, { DxArgumentAxis, DxLabel, DxLegend, DxSeries, DxCommonSeriesSettings, DxExport, DxPoint } from 'devextreme-vue/chart'; import { medalsInfo } from './data.js'; export default { components: { DxChart, DxArgumentAxis, DxLabel, DxLegend, DxSeries, DxCommonSeriesSettings, DxExport, DxPoint }, data() { return { medalsInfo }; } }; </script> <style> #chart { height: 440px; width: 100%; } </style>
    import Vue from 'vue'; import App from './App.vue'; new Vue({ el: '#app', components: { App }, template: '<App/>' });
    <!DOCTYPE html> <html> <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=1.0" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.2.4/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.2.4/css/dx.light.css" /> <script src="https://unpkg.com/core-js@2.4.1/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.js'); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="app"> </div> </div> </body> </html>
    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 }];
    System.config({ transpiler: 'plugin-babel', paths: { 'npm:': 'https://unpkg.com/' }, map: { vue: 'npm:vue@2.6.3/dist/vue.esm.browser.js', 'vue-loader': 'npm:dx-systemjs-vue-browser@latest/index.js', 'devextreme': 'npm:devextreme@19.2', 'devextreme-vue': 'npm:devextreme-vue@19.2', jszip: 'npm:jszip@3.1.3/dist/jszip.min.js', 'quill': 'npm:quill@1.3.7/dist/quill.js', 'devexpress-diagram': 'npm:devexpress-diagram', 'devexpress-gantt': 'npm:devexpress-gantt', 'plugin-babel': 'npm:systemjs-plugin-babel@0/plugin-babel.js', 'systemjs-babel-build': 'npm:systemjs-plugin-babel@0/systemjs-babel-browser.js' }, meta: { '*.vue': { loader: 'vue-loader' } }, packages: { 'devextreme-vue': { main: 'index.js' }, 'devextreme': { defaultExtension: 'js' } }, babelOptions: { sourceMaps: false, stage0: true } });