Error handling in angular

angularError.js

angular.module('app', [])

.config(function($provide, debug){
  // catch exceptions in angular
  $provide.decorator('$exceptionHandler', ['$delegate', function($delegate){
    return function(exception, cause){
      $delegate(exception, cause);

      var data = {
        type: 'angular',
        url: window.location.hash,
        localtime: Date.now()
      };
      if(cause)               { data.cause    = cause;              }
      if(exception){
        if(exception.message) { data.message  = exception.message;  }
        if(exception.name)    { data.name     = exception.name;     }
        if(exception.stack)   { data.stack    = exception.stack;    }
      }

      if(debug){
        console.log('exception', data);
        window.alert('Error: '+data.message);
      } else {
        mixpanel.track('exception', data);
      }
    };
  }]);

  // catch exceptions out of angular
  window.onerror = function(message, url, line, col, error){
    var stopPropagation = debug ? false : true;
    var data = {
      type: 'javascript',
      url: window.location.hash,
      localtime: Date.now()
    };
    if(message)       { data.message      = message;      }
    if(url)           { data.fileName     = url;          }
    if(line)          { data.lineNumber   = line;         }
    if(col)           { data.columnNumber = col;          }
    if(error){
      if(error.name)  { data.name         = error.name;   }
      if(error.stack) { data.stack        = error.stack;  }
    }

    if(debug){
      console.log('exception', data);
      window.alert('Error: '+data.message);
    } else {
      mixpanel.track('exception', data);
    }
    return stopPropagation;
  };
});

it's very useful,thanks~