Summary of common CSS abbreviation syntax

Summary of common CSS abbreviation syntax

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

Color

16 binary color values, if each two bits of the same value, can be shortened by 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 value representing top and bottom is the value of Value1,right and left is value2

Property:value1 value2 Value3; The value that represents top is the value of Value1,right and left is the value of Value2,bottom is Value3

Property:value1 value2 value3 value4; Four values in turn represent Top,right,bottom,left

Convenient memory method is clockwise, upper right down 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-width:1px;

Border-style:solid;

Border-color: #000;

can be abbreviated as a sentence: border:1px solid #000;

The 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-repeat:no-repeat;

background-attachment:fixed;

background-position:0 0;

can be abbreviated as a sentence: background: #f00 URL (background.gif) no-repeat fixed 0 0;

The syntax is Background:color image repeat attachment position;

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

Color:transparent

Image:none

Repeat:repeat

Attachment:scroll

position:0% 0%

Font (Fonts)

The properties of the font are as follows:

Font-style:italic;

Font-variant:small-caps;

Font-weight:bold;

Font-size:1em;

line-height:140%;

font-family: "Lucida Grande", Sans-serif;

can be abbreviated as a 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)

Cancel the default dot and ordinal can be written like this list-style:none;

The properties of the list are as follows:

List-style-type:square;

List-style-position:inside;

List-style-image:url (Image.gif);

can be abbreviated as a sentence: List-style:square inside URL (image.gif);

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