$anchorScroll.yOffset

If set, specifies a vertical scroll-offset. This is often useful when there are fixed positioned elements at the top of the page, such as navbars, headers etc.

yOffset can be specified in various ways:

• number: A fixed number of pixels to be used as offset.
  
  
• function: A getter function called everytime $anchorScroll() is executed. Must return a number representing the offset (in pixels).
  
  
• jqLite: A jqLite/jQuery element to be used for specifying the offset. The distance from the top of the page to the element's bottom will be used as offset.
  Note: The element will be taken into account only as long as its position is set to fixed. This option is useful, when dealing with responsive navbars/headers that adjust their height and/or positioning according to the viewport's size.