过滤器_小于索引
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//:lt(3)小于三的过滤器 $(function () { $('li :lt(3)').css('font-size','30px'); }); </script> </head> <body> <ul> <li>你好</li> <li>中国人</li> <li>这是</li> <li>哪里</li> <li>物理</li> <li>路径</li> </ul> </body> </html>