has
?? [h?z]
v.Have(have? 3?? ??) take; buy
class
English [klɑ:s ]美[kl?s]
n.class; grade; adj.?? ??, ???, ???
vi.... ????(?? ??)? ??, ?? ????(?? ??)? ???
jquery hasClass() ??? ???
??: hasClass() ???? ??? ??? ??? ???? ???? ??? ?????.
??: ??$(selector).hasClass(class)
????:
Parameters | Description |
class | ?????. ??? ???? ?? ???? ?????. |
jquery hasClass() ??? ?
<html> <head> <script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/2.1.1/jquery.min.js"></script> <script type="text/javascript"> $(document).ready(function(){ $("button").click(function(){ alert($("p:first").hasClass("intro")); }); }); </script> <style type="text/css"> .intro { font-size:120%; color:red; } </style> </head> <body> <h1 id="h1">This is a heading</h1> <p class="intro">This is a paragraph.</p> <p>This is another paragraph.</p> <button>檢查第一個(gè)段落是否擁有類 "intro"</button> </body> </html>
??? ????? ??? "???? ??" ??? ?????