这个SSCCE说明了一切:
<!doctype html>
<html lang="en">
<head>
<title>Test</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {
$('#add').click(function() {
var ul = $('#ul');
var liclone = ul.find('li:last').clone(true);
var input = liclone.find('input');
input.attr('name', input.attr('name').replace(/(foo\[)(\d+)(\])/, function(f, p1, p2, p3) {
return p1 + (parseInt(p2) + 1) + p3;
}));
liclone.appendTo(ul);
$('#showsource').text(ul.html());
});
});
</script>
</head>
<body>
<ul id="ul">
<li><input type="text" name="foo[0]"></li>
</ul>
<button id="add">Add</button>
<pre id="showsource"></pre>
</body>
</html>
Copy'n'paste'n'run它,点击Add几次按钮.在每次点击时,您都应该看到<ul>要显示的HTML代码,<pre id="showsource">预期代码大致应该是:
<li><input name="foo[0]" type="text"></li>
<li><input name="foo[1]" type="text"></li>
<li><input …