Error message: The line chart in angular-chartjs is encountering an issue with the function t.merge not

I am currently working on implementing a line chart example from the following source: . However, I am encountering an error and would appreciate any guidance or pointers to resolve it.

Here is the error displayed in the console.

Below is the code snippet that I have been using. I have attempted troubleshooting by moving the HTML outside of the ui-view but the issue persists even on the layout page. The code was mostly copied from the example provided on the website.

angular.module('app').controller(controllerId, [
                '$scope', function ($scope) {
                  //Line Chart
                    $scope.lineLabels = ["January", "February", "March", "April", "May", "June", "July"];
                    $scope.lineSeries = ['Series A', 'Series B'];
                    $scope.lineData = [
                      [65, 59, 80, 81, 56, 55, 40],
                      [28, 48, 40, 19, 86, 27, 90]
                    ];
                   
                    $scope.lineDatasetOverride = [{ yAxisID: 'y-axis-1' }, { yAxisID: 'y-axis-2' }];
                    $scope.lineOptions = {
                        scales: {
                            yAxes: [
                              {
                                  id: 'y-axis-1',
                                  type: 'linear',
                                  display: true,
                                  position: 'left'
                              },
                              {
                                  id: 'y-axis-2',
                                  type: 'linear',
                                  display: true,
                                  position: 'right'
                              }
                            ]
                        }
                    };
                  }
            ]);
<div class="box box-info">
                <div class="box-header with-border">
                    <h3 class="box-title">Line Chart</h3>
                    <div class="box-tools pull-right">
                        <button type="button" class="btn btn-box-tool" data-widget="collapse">
                            <i class="fa fa-minus"></i>
                        </button>
                        <button type="button" class="btn btn-box-tool" data-widget="remove"><i class="fa fa-times"></i></button>
                    </div>
                </div>
                <div class="box-body">
                    <div class="chart">
                        <canvas id="line" class="chart chart-line" chart-data="lineData"
                                chart-labels="lineLabels" chart-series="lineSeries" chart-options="lineOptions"
                                chart-dataset-override="lineDatasetOverride"></canvas>
                    </div>
                </div>
                <!-- /.box-body -->
            </div>

Answer №1

Validate the version of your Angular framework. It appears that you might be using a version like 1.2.X which lacks the merge function required by angular-chart.js.

To address this issue, consider inserting the following code snippet after loading Angular and before initializing the chart...

if (!angular.merge) {
  angular.merge = (function mergePollyfill() {
    function setHashKey(obj, h) {
      if (h) {
        obj.$$hashKey = h;
      } else {
        delete obj.$$hashKey;
      }
    }

    function baseExtend(dst, objs, deep) {
      var h = dst.$$hashKey;

      for (var i = 0, ii = objs.length; i < ii; ++i) {
        var obj = objs[i];
        if (!angular.isObject(obj) && !angular.isFunction(obj)) continue;
        var keys = Object.keys(obj);
        for (var j = 0, jj = keys.length; j < jj; j++) {
          var key = keys[j];
          var src = obj[key];

          if (deep && angular.isObject(src)) {
            if (angular.isDate(src)) {
              dst[key] = new Date(src.valueOf());
            } else {
              if (!angular.isObject(dst[key])) dst[key] = angular.isArray(src) ? [] : {};
              baseExtend(dst[key], [src], true);
            }
          } else {
            dst[key] = src;
          }
        }
      }

      setHashKey(dst, h);
      return dst;
    }

    return function merge(dst) {
      return baseExtend(dst, [].slice.call(arguments, 1), true);
    }
  })();
}

This solution was sourced from: deep merge objects with AngularJS

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