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The beauty of CSS centering

Source: Internet
Author: User
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What do you think about centering?

Div {margin: auto;}

A common centering method

Center horizontally

. Demo {    text-align: Center;      margin: auto;      position: absolute;      Left: 50%;      margin-left: -?px;}

Center vertically

. Demo {    height: 30px;     line-height: 30px;     display: Table-cell;      vertical-align: Middle;     position: absolute;      top: 50%;      margin-top: -?px;}

Is there any other way?

CSS3

Display:flex;

<!DOCTYPE HTML><HTML><Head><MetaCharSet=utf-8/></Head><Body>  <Divclass= "Flex">    <Divclass= "Flex-item">Flex Item</Div>  </Div></Body></HTML>
. Flex {  display: -webit-flex;   display: flex;   -webkit-align-items: Center;   align-items: Center;   Border: 1px solid;   height: 200px;} . Flex-item {  border: 1px solid Blue;   height: 50px;}

Center horizontally

{Alignment: center;}

Center vertically

{child-align: Middle;}

Position method

P {position:center;}

Fundamentals of CSS Theory

Box Model (box-sizing)

Border-box/content-box/padding-box

Positioning System
Normal stream (normal flow)
Block-level formatting context (block formatting contexts)
Inline formatting context (formatting contexts)
position:relative;
Floating (floats)
Absolute positioning (Absolute positioning)
Position:absolute;
position:fixed;

The essential work of the front end is "Restore Design"
And CSS is the ultimate realization of design intent

Three-layer separation (content, performance, behavior)
Graceful downgrade (Graceful degradation), 1994
Progressive Enhancement (Progressive enhancement), 2003

Misunderstanding

Misuse of the float layout
To close a float with an empty label
Control vertical spacing with <br>
With &nbsp; Control word spacing (justify layout, etc.)
Write a style directly on the label with the style property
Feel free to even use Pinyin to name Class,id
Multi-Class syndrome (abuse of OOCSS)

The beauty of CSS centering

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