[英]Trying to check if a checkbox is checked, please, what am i doing wrong?
$(document).ready(
function()
{
$('input[id^="btnRemoveCategory"]').bind(
'click',
function(){
if($('input[id^="chkIsBottom_":checked]'))
alert('YES YES YES!!!!');
else
alert('No NO no!!!!!');
I've tried with the: 我已经尝试过:
if($('input[id^="chkIsBottom_"]').attr(checked))
also.... 也....
where is my mistake??? 我的错误在哪里???
10x 10倍
$('input[id^="chkIsBottom_":checked]')
… is always going to return a true value. ……总是会返回一个真实值。 If none are checked, then it will be a jQuery object with no element inside it. 如果未选中任何对象,则它将是一个内部没有元素的jQuery对象。 You want: 你要:
$('input[id^="chkIsBottom_":checked]').length
(which will be false if the length is 0, and true if it isn't) (如果长度为0,则为false,否则为true)
Meanwhile: 与此同时:
if($('input[id^="chkIsBottom_"]').attr(checked))
… will get the value of the X attribute of the first input element with an id that starts with chkIsBottom_, where X is whatever the variable checked contains (which is probably undefined, since you probably intended to pass a string). …将获取第一个输入元素的X属性的值,其ID以chkIsBottom_开头,其中X是所检查的变量包含的任何内容(由于可能要传递字符串,因此未定义)。
You were very close with your first implementation. 您与第一个实现非常接近。
Try this adjustment: 尝试此调整:
$(document).ready(
function()
{
$('input[id^="btnRemoveCategory"]').bind(
'click',
function(){
if($('input[id^="chkIsBottom_"]:checked').length > 0)
alert('YES YES YES!!!!');
else
alert('No NO no!!!!!');
Another option: 另外一个选项:
if($('input[id^="chkIsBottom_"]').is(':checked'))
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