The assertion that 'd3Ctrl' is not a valid function, but instead is undefined

Although several people have raised the same issue before and I've attempted their solutions, I still can't seem to resolve it. My problem involves using d3, but I keep encountering this error:

app.js

var app = angular.module('myApp', []);

controller

app.controller('d3Ctrl', ['$scope', function($scope) {
    $scope.myData = [10,20,30,40,60];
}]);

directive:

app.directive('barsChart', function ($parse) {
     //explicitly creating a directive definition variable
     //this may look verbose but is good for clarification purposes
     //in real life you'd want to simply return the object {...}
     var directiveDefinitionObject = {
         //We restrict its use to an element
         //as usually  <bars-chart> is semantically
         //more understandable
         restrict: 'E',
         //this is important,
         //we don't want to overwrite our directive declaration
         //in the HTML mark-up
         replace: false,
         link: function (scope, element, attrs) {
           //converting all data passed thru into an array
           var data = attrs.chartData.split(',');
           //in D3, any selection[0] contains the group
           //selection[0][0] is the DOM node
           //but we won't need that this time
           var chart = d3.select(element[0]);
           //to our original directive markup bars-chart
           //we add a div with out chart stling and bind each
           //data entry to the chart
            chart.append("div").attr("class", "chart")
             .selectAll('div')
             .data(data).enter().append("div")
             .transition().ease("elastic")
             .style("width", function(d) { return d + "%"; })
             .text(function(d) { return d + "%"; });
           //a little of magic: setting it's width based
           //on the data value (d) 
           //and text all with a smooth transition
         } 
      };
      return directiveDefinitionObject;
   });

index.html

    <head>
            <style>
                .chart {
                background: #eee;
                padding: 3px;
            }

                .chart div {
              width: 0;
              transition: all 1s ease-out;
              -moz-transition: all 1s ease-out;
              -webkit-transition: all 1s ease-out;
            }

                .chart div {
              font: 10px sans-serif;
              background-color: steelblue;
              text-align: right;
              padding: 3px;
              margin: 5px;
              color: white;
              box-shadow: 2px 2px 2px #666;
            }
            </style>

          <!-- Bring in Bootstrap css so things look nice by default -->

            <script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script>


            <link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
            <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
            <script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
            <script src="bootstrap/ui-bootstrap-tpls-0.11.2.js"></script>

            <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.3/angular.min.js"></script>
            <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.3/angular-route.js"></script>
            <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.3/angular-resource.js"></script>

            <script type= "text/javascript" src="app.js"></script>
            <script type= "text/javascript" src="d3controller.js"></script>
            <script type= "text/javascript" src="d3directive.js"></script>

        </head>
<body>
     <div ng-controller="d3Ctrl">
          <bars-chart chart-data="myData"  ></bars-chart>
     </div>
</body>

I stumbled upon this example online and implemented it, yet it's causing me some trouble: Error: ng:areq Bad Argument Argument 'd3Ctrl' is not a function, got undefined I'm at a loss as to what might be incorrect, everything seems fine without this addition. Are there any insights or suggestions anyone could offer? Any assistance would be greatly appreciated!

Answer №1

Avoid Using Angular.min.js for Development

Using the minified version of Angular is meant for production purposes, not for development. It can lead to strange errors that are hard to troubleshoot. To avoid this, simply change the following line:

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.3/angular.min.js"></script>

to:

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.3/angular.js"></script>

JQuery Compatibility

If you encounter compatibility issues between JQuery and Angular, consider switching from Bootstrap to Angular Bootstrap. You can find more information and a link to Angular Bootstrap here.

Summary

By making these simple adjustments in your application, you will likely have a smoother development process. For additional guidance, check out this recommended Angular file structure on GitHub: Here. I've also found success using the angular bootstrap and full versions of AngularJS.

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