Background Attachment

• The background-attachment property sets whether a background image is fixed or scrolls with the rest of the page.

 body {
  background-image: url('img.jpg');
  background-attachment: fixed;
 }

|Value |Description|
| scroll |The background scrolls along with the element. This is default.|
| fixed| The background is fixed with regard to the viewport.|
|local |The background scrolls along with the element's contents.|
|initial |Sets this property to its default value.|
|inherit |Inherits this property from its parent element|

• Reference: Section 5.9