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Uncaught TypeError: Cannot read property 'getTime' of undefined

Viewing 8 posts - 1 through 8 (of 8 total)
  • November 30, 2017 at 4:56 pm #17760

    Mudassir

    I am facing an issue when updating the datapoints of canvas chart, and the error message says “Uncaught TypeError: Cannot read property ‘getTime’ of undefined”. Below is my html (I am making ajax call to update the datapoints)

    <html>
<head>
<script type="text/javascript">
    function GetGraph(val) {
        $("#dialogOpen").dialog({
            autoOpen: false,
            modal: true,
            title: "Graph"
        });
        $.ajax({
            type: 'POST',
            url: '/Ranking/ReturnKeywordGraph',
            contentType: "application/json; charset=utf-8",
            dataType: 'html',
            data: '{keywordId: "' + val + '" }'
        }).success(function (response) {
            //$('#dialogOpen').html(response);

            var chart = new CanvasJS.Chart("chartContainer",
            {
                title: {
                },
                animationEnabled: true,
                axisX: {
                    interval: 3
                },
                axisY: {
                },
                legend: {
                    verticalAlign: "bottom",
                    horizontalAlign: "center"
                },
                data: [{
                    name: "Graph Overview",
                    showInLegend: true,
                    legendMarkerType: "square",
                    type: "area",
                    color: "#0990B0",
                    markerSize: 0,
                    dataPoints: [
                                    response
                    ]
                }]
            });

            chart.render();
            $('#dialogOpen').dialog('open');
        }).error(function (response) {
            $('#dialogOpen').html(response.responseText);
            $('#dialogOpen').dialog('open');
        });
    }
</script>
</head>
<body>
<div id="dialogOpen" style="display: block; width:100%;">
                        <div id="chartContainer" style="height: 289px; width: 100%;">
                        </div>
                    </div>
</body>
</html>

    The output I receive in response is “{x: new Date(2017, 10, 20),y: 10},{x: new Date(2017, 10, 17),y: 15},” which when replaced with “response” renders the chart successfully. But passing response to datapoints gives the error.

    Any help ????

    December 1, 2017 at 1:27 pm #17818

    Suyash Singh

    @mudassir,

    dataPoints is an array of objects. But as per the code shared above, it seems like you are passing a string
    ("{x: new Date(2017, 10, 20),y: 10},{x: new Date(2017, 10, 17),y: 15}") to dataPoints array instead of objects. Therefore, parsing the data and converting it to objects like {x: new Date(2017, 10, 20),y: 10},{x: new Date(2017, 10, 17),y: 15} should work fine in your case. Here is an example you can refer.

    If this doesn’t suit your requirements, Can you please create a JSFiddle, along with your sample data, reproducing the issue?

    Simple Date and Time Chart

    ___
    Suyash Singh
    Team CanvasJS

    December 2, 2017 at 11:08 am #17837

    Mudassir

    @Suyash Singh
    Thanks mate, I got it working, thanks for the helping response.

    January 25, 2019 at 5:15 pm #24100

    savnur.imran

    Hi Mudassir
    I am facing same problem,can u tell me how did it worked

    January 28, 2019 at 8:16 pm #24132

    Shashi Ranjan

    @savnur-imran,

    As you are also facing a similar issue, you might also be passing a string to dataPoints array instead of an object. In case you are fetching the data from a JSON data source, I would suggest parsing the received to the format accepted by CanvasJS. Please refer to the code snippet below for an example:

    dataPoints : [ //array of dataPoint
   {x: new Date(2019, 00, 28), y: 10}, //dataPoint
   {x: new Date(2019, 00, 29), y: 15}  //dataPoint
]

    In case you’re still facing the issue, kindly create a JSFiddle reproducing the issue so that we can look into the code and chart-options being used by you, understand the scenario better and help you out?

    ____
    Shashi Ranjan
    Team CanvasJS

    May 29, 2019 at 2:35 pm #25332

    linehammer

    This error occurs in Chrome Browser when you read a property or call a method on an undefined object . Uncaught TypeError: Cannot read property of undefined error is probably easiest to understand from the perspective of undefined, since undefined is not considered an object type at all (but its own undefined type instead), and properties can only belong to objects within JavaScript. There are a few variations of this error depending on the property you are trying to access. Sometimes instead of undefined it will say null.

    February 27, 2020 at 8:47 am #28482

    Priyanka Kumari

    Hello sir,
    Sir, I have also the same output “{‘x’:new Date(2020,02,24),’y’:2},”. As you said then I tried to parse the string after that then this error are come “Uncaught SyntaxError: Unexpected token e in JSON at position 6”.
    I need your help!!

    February 27, 2020 at 6:56 pm #28493

    Shashi Ranjan

    @priyanka-kumari,

    Can you kindly create a sample project reproducing the issue and share it with us over Google-Drive or Onedrive along with sample JSON data so that we can look into the code, run it locally to understand the scenario better and help you resolve?

    —
    Shashi Ranjan
    Team CanvasJS

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