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.setbackground(@number) when (@number>0){ .setbackground( @number - 1 ); .class@{number} { background-image: ~"url(backgroundimage- @{number}.png)"; } } .setbackground(10); 输出以下css: .class1 { background-image: url(backgroundimage-1.png); } .class2 { background-image: url(backgroundimage-2.png); } .class3 { background-image: url(backgroundimage-3.png); } .class4 { background-image: url(backgroundimage-4.png); } .class5 { background-image: url(backgroundimage-5.png); } .class6 { background-image: url(backgroundimage-6.png); } .class7 { background-image: url(backgroundimage-7.png); } .class8 { background-image: url(backgroundimage-8.png); } .class9 { background-image: url(backgroundimage-9.png); } .class10 { background-image: url(backgroundimage-10.png); }
& symbol在less中有特殊的意义,它代表了当前selector的parent:
.class1 { .class2{ property: 5; } } .class1 { .class2 & { property: 5; } } 由于&代表了.class1所以编译后将输出以下css: .class1 .class2 { property: 5; } .class2 .class1 { property: 5; }
同样类似地:
.clearfix() { &:before, &:after { content: " "; /* 1 */ display: table; /* 2 */ } &:after { clear: both; } } .wrapper { .clearfix(); 该调用将自动在.wrapper:after{clear: both;}清除float影响 }
Less的guards and argument matching
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原文地址:http://www.cnblogs.com/kidsitcn/p/4914094.html