Referencing DOM nodes in Angular expressions is disallowed! Expression: {0}

Occurs when an expression attempts to access a DOM node.

AngularJS restricts access to DOM nodes from within expressions since it's a known way to execute arbitrary Javascript code.

This check is only performed on object index and function calls in Angular expressions. These are places that are harder for the developer to guard. Dotted member access (such as a.b.c) does not perform this check - it's up to the developer to not expose such sensitive and powerful objects directly on the scope chain.

To resolve this error, avoid access to DOM nodes.

Event Handlers and Return Values

The $parse:isecdom error also occurs when an event handler invokes a function that returns a DOM node.

<button ng-click="iWillReturnDOM()">click me</button>

$scope.iWillReturnDOM = function() {
  return someDomNode;
}

To fix this issue, avoid returning DOM nodes from event handlers.

Note: This error often means that you are accessing DOM from your controllers, which is usually a sign of poor coding style that violates separation of concerns.

Implicit Returns in CoffeeScript

This error can occur more frequently when using CoffeeScript, which has a feature called implicit returns. This language feature returns the last dereferenced object in the function when the function has no explicit return statement.

The solution in this scenario is to add an explicit return statement. For example return false to the function.