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2014 Alibaba web pre intern project analysis (1)
2022-07-06 22:33:00 【Full stack programmer webmaster】
Hello everyone , I meet you again , I'm the king of the whole stack .
Following simplification CSS Code :
div.container{
width:500px;
background-image:url(/img/sprite.png);
background-repeat:no-repeat;
background-position:0px -78px;
}
div.container ul#news-list,div.container ul#news-list li{
margin:0px;padding:0px;
}
div.container ul#news-list li{
padding-left:20px;
background-image:url(/img/sprite.png);
background-position:-120px opx;
}
A{
font-size:14px;
font-weight:bold;
line-height:150%;
color:#000000;
}
answer :
div.container{ width:500px; background-image:url(/img/sprite.png); background-repeat:no-repeat; background-position:0px -78px;}div.container ul#news-list,div.container ul#news-list li{ margin:0px;padding:0px;}div.container ul#news-list li{ padding-left:20px; background-image:url(/img/sprite.png); background-position:-120px opx;}A{ font-size:14px; font-weight:bold; line-height:150%; color:#000000;}div.container{ width:500px; background:url(/img/sprite.png) no-repeat 0 -78px;}#news-list,#news-list li{ margin:0 padding:0;}#news-list li{ padding-left:20px;background:url(/img/sprite.png)no-repeat -120px 0;}
analysis :CSS Brief introduction to usage
(1)CSS in font Abbreviation :
font:italicsmall-capsbold12px/1.5emarial,verdana; Equivalent to :
font-style:italic;font-variant:small-caps;font-weight:bold;font-size:12px;line-height:1.5em;font-family:arial,verdana;
The order :font-style|font-variant|font-weight|font-size|line-height|font-family
(2)CSS in background Abbreviation :
background:#fffurl(bg.gif)no-repeatfixedlefttop; Equivalent to :
background-color:#fff;background-image:url(bg.gif);background-repeat:no-repeat;background-attachment:fixed;background-position:lefttop;
The order :background-color|background-image|background-repeat|background-attachment|background-position
(3)CSS in margin&padding Abbreviation :
border:1pxsolid#000; Equivalent to :
border-width:1px;
border-style:solid;
border-color:#000;
The order :border-width|border-style|border-color
(4)CSS in list-style Abbreviation :
list-style:squareoutsideurl(bullet.gif); Equivalent to :
list-style-type:square;
list-style-position:outside;
list-style-image:url(bullet.gif)
The order :list-style-type|list-style-position|list-style-image
(5) The abbreviations of four sides are generally as follows :
padding:1px2px3px4px; Equivalent to :
padding-top:1px;
padding-right:2px;
padding-bottom:3px;
padding-left:4px;
The order :top|right|bottom|left Regardless of the border width . Or border color 、 Margin, etc , Just CSS The style involves four sides . The sequence is all “ On the lower left ”( clockwise ).
5.1) Suppose the values of four sides omit one . Just write three :
padding:1px2px3px; Is equivalent to omitted “ The left value ” be equal to “ Right value ”:
padding-top:1px;
padding-right:2px;
padding-bottom:3px;
padding-left:2px;
5.2) Suppose the values of four sides omit two :
padding:1px2px; Equivalent to : The left value omitted is equal to the right value . The upper value equals the lower value
padding-top:1px;
padding-right:2px;
padding-bottom:1px;
padding-left:2px;
5.3) There is only one value
Padding:1px: Equivalent to :
padding-top:1px;
padding-right:1px;
padding-bottom:1px;
padding-left:1px;
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