Parameters:

• options Object

  An object with the following optional properties:

  defaultImage

  This could be a string url to an image to use when there is no matching gravatar image or it could be one of the following values: '404', 'mm', 'identicon', 'monsterid', 'wavatar', or 'retro' Refer to gravatar's documentation: http://en.gravatar.com/site/implement/images/

  email

  The user's e-mail address.

  force

  If this is a truthy value, it will force the default image to load even if there is a matching gravatar image.

  rating

  The maximum image rating that is allowed to load. It could be one of the following values: 'g', 'pg', 'r', 'x' Defaults to 'g'. Refer to gravatar's documentation: http://en.gravatar.com/site/implement/images/

  secure

  If this is a truthy value, the url will use the secure https protocol.

  size

  An integer representing the height and width of the image in pixels. Values from 1 to 512 inclusive are supported. Gravatar images are square.

• callbackFunction Function

  This function receives the gravatar url as its only parameter.

• contextObject Object

  (optional) An object to provide as the execution context for the callback function.