[Chartjs]-Return array from ajax

You can not return from ajax as it is asynchronous in nature, Use callback function or do the initialization of barChartData in ajax success handler.

Try this:

$.ajax({
  method: "GET",
  cache: false,
  url: "charts/applieschart.php",
  success: function(myData) {
    var chartjsLabel = [];
    var chartjsData = [];
    for (var i = 0; i < myData.length; i++) {
      chartjsData.push(myData[i].count);
      chartjsLabel.push(myData[i].date);
    }
    var barChartData = {
      labels: chartjsLabel,
      datasets: [{
        fillColor: "rgba(220,280,220,0.5)",
        strokeColor: "rgba(220,220,220,1)",
        data: chartjsData
      }]
    };
  }
});