App Already Bootstrapped with this Element '{0}'

Description

Occurs when calling angular.bootstrap on an element that has already been bootstrapped.

This usually happens when you accidentally use both ng-app and angular.bootstrap to bootstrap an application.

<html>
...
  <body ng-app="myApp">
    <script>
      angular.bootstrap(document.body, ['myApp']);
    </script>
  </body>
</html>

Note that for bootrapping purposes, the <html> element is the same as document, so the following will also throw an error.

<html>
...
<script>
  angular.bootstrap(document, ['myApp']);
</script>
</html>

App Already Bootstrapped with this Element error in component ng