<!DOCTYPE html><html> <head> <title>下滑线跟随导航</title> &...
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<html><head> <meta charset="utf-8"> <title>三级下拉菜单</title> &l...
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<!DOCTYPE html><html> <head> <meta char...
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<!DOCTYPE html><html><head> <meta charset="utf-8"> &n...
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基本选择器共有五种类型:$('#id名')是根据给定的id来匹配到元素;$('.class名')是根据给定的class来匹配到元素;$('element'...
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