jQuery Traversal - Nenek moyang
Lintas DOM ke atas
ibu bapa()
ibu bapa()
ibu bapaHingga()
ibu bapa( ) kaedah
kaedah induk() mengembalikan elemen induk langsung bagi elemen yang dipilih.
Kaedah ini hanya akan merentasi pokok DOM satu tahap ke atas.
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <style> .ancestors * { display: block; border: 2px solid lightgrey; color: lightgrey; padding: 5px; margin: 15px; } </style> <script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js"></script> <script> $(document).ready(function(){ $("span").parent().css({"color":"blue","border":"2px solid red"}); }); </script> </head> <body> <div class="ancestors"> <div style="width:300px;">div (曾祖父元素) <ul>ul (祖父元素) <li>li (父元素) <span>span</span> </li> </ul> </div> <div style="width:300px;">div (祖父元素) <p>p (父元素) <span>span</span> </p> </div> </div> </body> </html>
kaedah ibu bapa() Kaedah
ibu bapa() mengembalikan semua elemen nenek moyang elemen yang dipilih, sehingga ke elemen akar dokumen (< html>).
<!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/1.10.2/jquery.min.js"> </script> <script> $(document).ready(function(){ $("span").parents("ul").css({"color":"red","border":"2px solid red"}); }); </script> </head> <body class="ancestors">body (great-great-grandparent) <div style="width:300px;">div (great-grandparent) <ul>ul (grandparent) <li>li (direct parent) <span>span</span> </li> </ul> </div> </body> </html>
Mengembalikan semua nenek moyang semua <span>
kaedah parentsUntil()
kaedah parentsUntil() mengembalikan semua unsur nenek moyang antara dua elemen yang diberikan.
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <style> .ancestors * { display: block; border: 2px solid lightgrey; color: lightgrey; padding: 5px; margin: 15px; } </style> <script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js"> </script> <script> $(document).ready(function(){ $("span").parentsUntil("div").css({"color":"blue","border":"3px solid green"}); }); </script> </head> <body class="ancestors"> body (曾曾祖父元素) <div style="width:300px;">div (曾祖父元素) <ul>ul (祖父元素) <li>li (父元素) <span>span</span> </li> </ul> </div> </body> </html>
Mengembalikan semua unsur nenek moyang antara <span> dan <div>