A bug encountered with AngularJS and dojox.charting: Error message 'nodeType' of null

My goal is to dynamically populate a div with various graphs from Dojo, depending on the current data model.

However, I keep encountering the error message "Cannot read property 'nodeType' of null" when running my code.

I suspect that this issue arises because Dojo is trying to render into a div that hasn't been created yet. While the div exists in memory and AngularJS can interact with it, it has not been generated in the DOM.

Here is the code snippet in question:

Is there a way to ensure that the element is fully created before rendering the graph?

function GetBarChart(elementName)
{
require(["dojox/charting/Chart", "dojox/charting/axis2d/Default", "dojox/charting/plot2d/StackedAreas", "dojox/charting/themes/Wetland" , "dojo/ready"],
  function(Chart, Default, StackedAreas, Wetland, ready)
 {

ready(function()
{
  alert(elementName);
  var c = new Chart(elementName);
  c.addPlot("default", {type: StackedAreas, tension:3})
    .addAxis("x", {fixLower: "major", fixUpper: "major"})
    .addAxis("y", {vertical: true, fixLower: "major", fixUpper: "major", min: 0})
    .setTheme(Wetland)
    .addSeries("Series A", [1, 2, 0.5, 1.5, 1, 2.8, 0.4])
    .addSeries("Series B", [2.6, 1.8, 2, 1, 1.4, 0.7, 2])
    .addSeries("Series C", [6.3, 1.8, 3, 0.5, 4.4, 2.7, 2])
    .render();
});
});

}

angular.module('myApp')
.directive('myWidget', function() 
{
return {
 link:function(scope, element, attrs)
 {      
    element.id = scope.widget.id;
    GetBarChart(element.id );
    console.log(element);
  }
};
});

Answer №1

Although I am still in the early stages of learning AngualJS, I have discovered a solution to a common issue. Instead of setting the id of the div in the link function, it proved more effective to set it directly in the directive HTML code.

<div id ="{{widget.id}}" ></div>

This simple adjustment appeared to resolve any ordering problems that were previously occurring.

As I continue to explore AngualJS, I can't help but wonder if there are even more efficient methods available for achieving similar results.

Answer №2

When dealing with elements wrapped by jQuery, retrieving the id can be done by using this format:

element[0].id

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