Summarize CSS Usage tips

Center vertically with Line-height

line-height:24px;
With a fixed-width container and one row vertically centered, use Line-height (the height is consistent with the parent container), and more vertical centers can be seen here.

Clear Container Float

#main {Overflow:hidden;}

Before the issue was mentioned, more information can be seen here.

Do not leave a link wrapped

a {white-space:nowrap;}

The above setting avoids the link wrapping, but the individual suggests that the long link will have a corresponding line (for a discussion of line breaks, see the records in the center of the circle).

Always let Firefox show scroll bars

HTML {overflow:-moz-scrollbars-vertical;}

More Mozilla/firefox private CSS properties can be consulted here. Requires cross-browser support, or you can use the

Body, HTML {min-height:101%;}

Center The Block element horizontally

margin:0 Auto;
is actually

Margin-left:auto;
Margin-right:auto;
This technique basically all the CSS textbooks will have a description, don't forget to add a width to it. can also be used under Exploer

body{Text-align:center;}

Then define the inner layer container

Text-align:left;
Recovery.

Hide Exploer textarea scroll bar

textarea {Overflow:auto;}

Exploer By default textarea will have a vertical scroll bar (don't ask me why).

Set up print paging

h2 {page-break-before:always;}

The Page-break-before property enables you to set pagination when a page is printed.

Delete a dashed box on a link

A:active, A:focus {outline:none;}

Firefox defaults to a dotted box when the link gets focus (or when clicked), and can be deleted using the properties above.

The simplest CSS reset

* {margin:0; padding:0}