AngularJS encounters difficulties in pinpointing the exact location of errors due to its lack of compilation.
For example, let's say you define a module called 'XYZ' like so:
angular.module('XYZ', []);
And then proceed to use it like this:
var app = angular.module('XYZ');
If you mistakenly write it as:
var app = angular.module('XYZ', []);
AngularJS will interpret this as an attempt to override the previous module. Consequently, Angular cannot locate the dependencies for components previously defined within the 'XYZ' module, leading to undefined component errors.
Furthermore, these errors often occur during the angular digest cycle, which is not directly coded by us.
Consider the following scenario:
$scope.$watch('foo', function() {
$scope.foo = $scope.foo + 1;
});
This piece of code will run infinitely as 'foo' is being watched for changes and subsequently modified inside the watch function.
After 10 iterations, Angular will halt execution and display a message indicating a possible digest cycle repetition without identifying the specific code responsible for it.
Note: Debugging in AngularJS can be challenging, but carefully reviewing recent changes can help uncover the root cause of the issue.