Htmlcss Notes--positioning

1. Positioning:

Position:relative (relative)

Does not affect the characteristics of the element itself;

does not cause the element to infer the original document flow; it also occupies the seat.

Position element Control: Top/right/bottom/left locates the element offset.

Absolute (absolute positioning)

Leave the element out of the document flow,

Enables inline elements to support wide heights,

Fast attribute tag content open width.

Offset relative to the entire document, not relative to its original position or body to offset;

* If there is a target parent, it is positioned relative to the location parent, and if not, relative to the document location

Relative positioning is generally used in conjunction with absolute positioning.

　　

Anchor element default the latter hierarchy is higher than the former.

Positioning hierarchy: Z-index:[number]; Default 0

　　　

2. Transparency: IE incompatible; Standard: opacity: opacity:0~1;

IE private: Filter:alpha (opacity=0~100);

　　　　

3.

The landing frame is centered with the entire page:

POSITION:ABSOLUTE;TOP:50%;LEFT:50%;MARGIN-TOP:-APX;MARGIN-LEFT:-BPX;

A is the height of the landing frame, B is the width of the landing frame, also consider the border, the padding, etc.

4.pisition:fixed;

fixed positioning;

The characteristics and absolute positioning are basically consistent, the difference is always relative to the entire document positioning;

IE6 does not support fixed positioning, if need to be compatible with JS positioning.

5.position:inherit;

Inherit from parent, not basic.

6.position:static;

Default inheritance;

Htmlcss Notes--positioning