Home forums Using CanvasJS Uncaught type error: cannot read property of undefined


This topic contains 1 reply, has 2 voices, and was last updated by  Vishwas R 2 months, 3 weeks ago.

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  • #24516

    I have a problem when updating datapoint in canvas chart. I get this error message:

    Uncaught TypeError: Cannot read property ‘getTime’ of undefined

    The output I receive in response.msg is

    [{label: ‘Purok I’, y:1},{label: ‘Purok II’, y:1},{label: ‘Purok III’, y:2}]
    When this is replaced with response renders the chart successfully. However passing response to datapoints gives the error. This is my Javascript. Any help?

    $(‘#barangay-list’).click(function() {
    var barangay_id = $(this).val()
    url: ‘../classes/main.php’,
    type: ‘POST’,
    data: {
    ‘population-chart’: 1,
    ‘barangay_id’: barangay_id
    async: true,
    dataType: ‘JSON’,
    success: function(response, data) {
    var chart = new CanvasJS.Chart(“chartContainer”, {
    theme: “light2”,
    zoomEnabled: true,
    animationEnabled: true,
    animationEnabled: true,
    axisX: {
    title: “Street Name”,
    gridThickness: .9,
    lineThickness: .9,
    titleFontSize: 14,
    labelFontSize: 12,
    axisY: {
    includeZero: true,
    title: “Number of Population”,
    gridThickness: .9,
    lineThickness: .9,
    titleFontSize: 14,
    labelFontSize: 12
    toolTip: {
    shared: “true”
    legend: {
    cursor: “pointer”,
    itemclick: toggleDataSeries,
    verticalAlign: “bottom”,
    horizontalAlign: “center”
    data: [{
    type: “spline”,
    showInLegend: true,
    name: “Populaltion Number”,
    dataPoints: response.msg

    function toggleDataSeries(e) {
    if (typeof(e.dataSeries.visible) === “undefined” || e.dataSeries.visible) {
    e.dataSeries.visible = false;
    } else {
    e.dataSeries.visible = true;
    // Error Handler
    error: function(xhr, textStatus, error) {



    Can you kindly create sample project with sample data reproducing the issue and share it to us over Google-Drive or Onedrive, which helps us run your code at our end, understand the issue you are facing and help you with a solution?

    Vishwas R
    Team CanvasJS

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