.is() 检查当前的配套与选择器,jQuery对象的元素,或返回TRUE如果在这些元素的至少一个匹配给定的参数。
<!doctype html> <html lang="en"> <head> <meta charset="utf-8"> <title>is demo</title> <style> div { width: 60px; height: 60px; margin: 5px; float: left; border: 4px outset; background: green; text-align: center; font-weight: bolder; cursor: pointer; } .blue { background: blue; } .red { background: red; } span { color: white; font-size: 16px; } p { color: red; font-weight: bolder; background: yellow; margin: 3px; clear: left; display: none; } </style> <script src="//code.jquery.com/jquery-1.10.2.js"></script> </head> <body> <div></div> <div class="blue"></div> <div></div> <div class="red"></div> <div><br/><span>Peter</span></div> <div class="blue"></div> <p> </p> <script> $( "div" ).one( "click", function() { if ( $( this ).is( ":first-child" ) ) { $( "p" ).text( "It‘s the first div." ); } else if ( $( this ).is( ".blue,.red" ) ) { $( "p" ).text( "It‘s a blue or red div." ); } else if ( $( this ).is( ":contains(‘Peter‘)" ) ) { $( "p" ).text( "It‘s Peter!" ); } else { $( "p" ).html( "It‘s nothing <em>special</em>." ); } $( "p" ).hide().slideDown( "slow" ); $( this ).css({ "border-style": "inset", cursor: "default" }); }); </script> </body> </html> <br> <a href="http://api.jquery.com/is/">原文地址</a>
.is() 检查当前的配套与选择器,jQuery对象的元素,或返回TRUE如果在这些元素的至少一个匹配给定的参数。,古老的榕树,5-wow.com
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