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JavaScript/jQuery Charts - 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
$(() => { $('#chart').dxChart({ dataSource, commonSeriesSettings: { argumentField: 'year', type: 'steparea', steparea: { point: { visible: true }, }, }, series: [{ valueField: 'gold', name: 'Gold Medals', color: '#ffd700' }, { valueField: 'silver', name: 'Silver Medals', color: '#c0c0c0' }], title: { text: 'France Olympic Medals', }, export: { enabled: true, }, argumentAxis: { label: { format: { type: 'decimal', }, }, }, legend: { verticalAlignment: 'bottom', horizontalAlignment: 'center', }, }); });
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml" 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" /> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script> <script>window.jQuery || document.write(decodeURIComponent('%3Cscript src="js/jquery.min.js"%3E%3C/script%3E'))</script> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/25.1.3/css/dx.light.css" /> <script src="js/dx.all.js"></script> <script src="data.js"></script> <link rel="stylesheet" type="text/css" href="styles.css" /> <script src="index.js"></script> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="chart"></div> </div> </body> </html>
#chart { height: 440px; width: 100%; }
const dataSource = [{ 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, }];