时间:2021-01-30 10:26:34 | 栏目:jquery | 点击:次
本文实例总结了jQuery常见的遍历DOM操作。分享给大家供大家参考,具体如下:
向上遍历DOM树
<!DOCTYPE html> <html> <head> <style> .ancestors *{ display:block; border:2px solid lightgrey; color:lightgrey; padding:5px; margin:15px; } </style> <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script> <script > $(document).ready(function(){ $("span").parent().css({"color":"red","border":"2px solid red"}); }); </script> </head> <body> <div class="ancestors"> <div style="width:500;">div(曾祖父) <ul>ul(祖父) <li>li(直接父) <span>span</span> </li> </ul> </div> <div style="width:500px;">div(祖父) <p>p(直接父) <span>span</span> </p> </div> </div> </body> </html>
运行结果:
parentsUntil()
方法
$(document).ready(function(){ $("span").parentsUntil("div"); });
<!DOCTYPE html> <html> <head> <style> .ancestors *{ display:block; border:2px solid lightgrey; color:lightgrey; padding:5px; margin:15px; } </style> <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script> <script> $(document).ready(function(){ $("span").parentsUntil("div").css({"color":"red","border":"2px solid red"}); }); </script> </head> <body class="ancestors">body(增曾祖父) <div style="width:500px;">div(曾祖父) <ul>ul(祖父) <li>li(直接父) <span>span</span> </li> </ul> </div> </body> </html>
运行结果:
向下遍历DOM树
children()
方法
<!DOCTYPE html> <html> <head> <style> .descendants *{ display:block; border:2px solid lightgrey; color:lightgrey; padding:5px; margin:15px; } </style> <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script> <script> $(document).ready(function(){ $("div").children().css({"color":"red","border":"2px solid red"}); $("div").children("p.1").css({"color":"red","border":"2px solid red"}); }); </script> </head> <body> <div class="descendants" style="width:500px;">div(当前元素) <p class="1">p(子) <span>span(孙)</span> </p> <p class="2">p(子) <span>span(孙)</span> </p> </div> </body> </html>
运行结果:
find()
方法
<!DOCTYPE html> <html> <head> <style> .descendants *{ display:block; border:2px solid lightgrey; color:lightgrey; padding:5px; margin:15px; } </style> <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script> <script> $(document).ready(function(){ $("div").find("span").css({"color":"red","border":"2px solid red"}); }); </script> </head> <body> <div class="descendants" style="width:500px;">div(current element) <p>P子 <span>span(孙)</span> </p> <p>p子 <span>span(孙)</span> </p> </div> </body> </html>
运行结果:
返回<div>
所有后代
$(document).ready(function(){ $("div").find("*"); });
水平遍历DOM树
<!DOCTYPE html> <html> <head> <style> .siblings *{ display:block; border:2px solid lightgrey; color:lightgrey; padding:5px; margin:15px; } </style> <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script> <script> $(document).ready(function(){ $("h2").siblings().css({"color":"red","border":"2px solid red"}); }); </script> </head> <body class="siblings"> <div>div(父) <p>p</p> <span>span</span> <h2>h2</h2> <h3>h3</h3> <p>p</p> </div> </body> </html>
运行结果:
jQuery遍历 过滤
<!DOCTYPE html> <html> <head> <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script> <script> $(document).ready(function(){ $("div p").first().css("background-color","yellow"); }); </script> </head> <body> <h1>我心在北朝、</h1> <div> <p>田野上</p> </div> <div> <p>红彤彤的野花</p> </div> <p>玲珑剔透</p> </body> </html>
运行结果:
eq()
方法的使用
<!DOCTYPE html> <html> <head> <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script> <script> $(document).ready(function(){ $("p").eq(1).css("background-color","yellow"); }); </script> </head> <body> <h1>我心在南朝、</h1> <p>田野上</p> <p>红彤彤的野花</p> <p>玲珑剔透</p> <p>我爱你</p> </body> </html>
运行结果:
filter()
方法的使用
<!DOCTYPE html> <html> <head> <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script> <script> $(document).ready(function(){ $("p").filter(".intro").css("background-color","yellow"); }); </script> </head> <body> <h1>我心在南朝、</p> <p>田野上</p> <p class="intro">红彤彤的草莓</p> <p class="intro">玲玲剔透</p> <p>我爱你</p> </body> </html>
运行结果:
感兴趣的朋友可以使用在线HTML/CSS/JavaScript代码运行工具http://tools.jb51.net/code/HtmlJsRun测试上述代码运行效果。
更多关于jQuery相关内容还可查看本站专题:《jQuery操作DOM节点方法总结》、《jQuery遍历算法与技巧总结》、《jQuery表格(table)操作技巧汇总》、《jQuery扩展技巧总结》、《jQuery常见经典特效汇总》、《jquery选择器用法总结》及《jQuery常用插件及用法总结》
希望本文所述对大家jQuery程序设计有所帮助。