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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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    $(function(){ $("#chart").dxChart({ dataSource: 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"> <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" /> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/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/19.2.5/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.2.5/css/dx.light.css" /> <script src="https://cdn3.devexpress.com/jslib/19.2.5/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%; }
    var 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 }];