| Valid value | Description |
|---|
| visible | Content is not clipped, i.e., it may be rendered outside the block box. |
| hidden | Content is clipped and no scrolling mechanism should be provided to view the content outside the clipping region; users will not have access to clipped content. The size and shape of the clipping region is specified by the "clip" property. |
| scroll | content is clipped and if the user agent uses a scrolling mechanism that is visible on the screen (such as a scroll bar or a panner), that mechanism should be displayed for a box whether or not any of its content is clipped. This avoids any problem with scrollbars appearing and disappearing in a dynamic environment. When this value is specified and the target medium is "print", overflowing content should be printed. |
| error-if-overflow | Implies the same semantics as the value "hidden" with the additional semantic that an error shall be indicated; implementations may recover by clipping the region. |
| repeat | On a formatting object which generates and returns normal viewport/reference pairs, this value specifies that additional viewport/reference pairs are to be generated so that the reference-area component of each pair is no larger than its parent viewport-area. On other formatting objects (including formatting objects whose absolute-position trait is "absolute" or "fixed"), it acts as if an overflow value of "auto" were specified. |
| auto | The behavior of the "auto" value is user agent dependent, but should cause a scrolling mechanism to be provided for overflowing boxes. |
| inherit | |