删除和替换

.remove([selector])

移除某一个节点以及他们的孩子节点。

$('.pear').remove();
$.html();
//=> <ul id = "fruits">
//     <li class = "apple">Apple</li>
//     <li class = "orange">Orange</li>
// </ul>

.replaceWith(content)

替换匹配的节点。

var plum = $('<li class = "plum">Plum</li>');
$('.pear').replaceWith(plum);
$.html();
//=> <ul id = "fruits">
//    <li class = "apple">Apple</li>
//    <li class = "orange">Orange</li>
//    <li class = "plum">Plum</li>
// </ul>