我在 id="coclevel1"
的页面上有一个下拉列表 (
$('[id^=coclevel]').live('change', function() {
var currElement = $(this).attr('id');
alert(currElement); //for debug
cleanUpCocOptionsAfter(currElement);
renderSubItemsOf(currElement);
});
renderSubItemsOf(currElement);
查询数据库,如果数据不为空,则添加新的下拉列表并填充它。
function cleanUpCocOptionsAfter(currElement) {
var num = $('.cocItems').length;
var currNum = parseInt(currElement.substring(8, currElement.length));
for (var i = currNum + 1; i <= num; i++) {
$('#coclevel' + i).remove();
$('#cocBr' + i).remove();
}
}
function renderSubItemsOf(currElement) {
var parentId = $('#' + currElement + ' option:selected').val();
$.getJSON('getchildrenof/' + parentId,
function() {
}).success(function(data) {
var len = data.length;
if (len > 0) {
var newElemSelector = '#' + addCocOptionAfter(currElement);
for (var i = 0; i < len; i++) {
$(newElemSelector).append($("<option></option>").attr("value", data[i].id).text(data[i].description));
}
} else {
//not developed yet
}
});
}
function addCocOptionAfter(currElement) {
// how many "duplicatable" input fields we currently have
var num = $('.cocItems').length;
var currNum = parseInt(currElement.substring(8, currElement.length));
var currElemSelector = '#' + currElement;
// the numeric ID of the new input field being added
var newNum = new Number(num + 1);
// create the new element via clone(),
//and manipulate it's ID using newNum value
var newElemId = 'coclevel' + newNum;
var newElem = $(currElemSelector).clone().attr('id', newElemId).empty();
$(newElem).append($("<option></option>").attr("value", -1).text('-- Select one --'));
// insert the new element after the last "duplicatable" input field
$(currElemSelector).after(newElem);
$(currElemSelector).after('<br/>').attr('id', 'cocBr' + newNum);
return newElemId;
}
添加新的下拉框和填充工作正常,但此后先前的下拉框丢失了事件,并且当我尝试更改所选选项时,什么也没有出现(浏览器不显示 alert(currElement);//用于调试
)。请帮忙解决这个问题。
最佳答案
我不确定我明白你在问什么,但是如果你希望使用元素克隆 jQuery 事件处理程序,那么你需要使用 .clone(true)
而不仅仅是克隆()
。请参阅here了解更多信息。
关于jquery - 在此元素后插入克隆时元素丢失事件,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/7460506/