CSS Optimization 2-(Common CSS Abbreviations Grammar summary) _ Experience Exchange

Source: Internet
Author: User
Using abbreviations can help reduce the size of your CSS files and make it easier to read. The main rules for CSS abbreviations are as follows:

16 The color value of the binary, if the value of each two digits is the same, you can abbreviate half, for example:
#000000可以缩写为 #000; #336699可以缩写为 #369;

Box size
There are usually four ways to write:

property:value1; Indicates that all edges are a value value1;
Property:value1 value2; The values that represent top and bottom are value1,right and left values that are value2
Property:value1 value2 Value3; The value that represents top is value1,right and left is the value of Value2,bottom is Value3
Property:value1 value2 value3 value4; The four values, in turn, represent Top,right,bottom,left
Convenient memory method is clockwise, upper right and lower left. Examples of specific applications in margin and padding are as follows:
Margin:1em 0 2em 0.5em;

Border (border)
The properties of the border are as follows:

Border-color: #000;
can be abbreviated as one sentence: border:1px solid #000;

Grammar is border:width style color;

Background (backgrounds)
The properties of the background are as follows:

Background-color: #f00;
Background-image:url (background.gif);
background-position:0 0;
can be abbreviated to one sentence: background: #f00 URL (background.gif) no-repeat fixed 0 0;

The grammar is Background:color image repeat attachment position;

You can omit one or more of the property values, and if omitted, the property value will be in the browser default value, the default value is:

position:0% 0%
Font (Fonts)
The properties of the font are as follows:

font-family: "Lucida Grande", Sans-serif;
can be abbreviated as one sentence: Font:italic small-caps bold 1em/140% "Lucida Grande", Sans-serif;

Note that if you abbreviate a font definition, you must define at least two values for font-size and font-family.

List (lists)
Cancellation of the default dot and ordinal can be written like this list-style:none;

The properties of the list are as follows:

List-style-image:url (Image.gif);
can be abbreviated to one sentence: List-style:square inside URL (image.gif);
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