jQuery 如何获取选中的复选框数组javascript的长度
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How can get length on checked checkbox array javascript
提问by user1148875
<form name='form1' >
<input type=checkbox name='cbox[]' />
</form>
<script>
var checkbox = document.getElementsByName('ckbox[]')
var ln = checkbox.length
alert(ln)
</script>
How can I count only the checked checkboxes with JavaScript or jQuery?
如何只计算 JavaScript 或 jQuery 选中的复选框？
回答by Adil
回答by Sandeep
If you want to use plain javascript
如果你想使用普通的 javascript
var checkbox = document.getElementsByName('ckbox[]');
var ln = 0;
for(var i=0; i< checkbox.length; i++) {
if(checkbox[i].checked)
ln++
}
alert(ln)
回答by VisioN
jQuery solution:
jQuery 解决方案：
var len = $("[name='cbox[]']:checked").length;
JavaScript solution:
JavaScript 解决方案：
var len = [].slice.call(document.querySelectorAll("[name='cbox[]']"))
.filter(function(e) { return e.checked; }).length;
回答by Greg
$('input:checked').lengthwill do if you do not have any other input tags than in this form.
$('input:checked').length如果您没有此表单之外的任何其他输入标签，就会这样做。
回答by Greg
Try this
尝试这个
jQuery solution:
jQuery 解决方案：
var len = $(":checked",$("input[name='cbox[]']")).size();
回答by Gaurav
var fobj = document.forms[0];
var c = 0;
for (var i = 0; i < formobj.elements.length; i++)
{
if (fobj.elements[i].type == "checkbox")
{
if (fobj.elements[i].checked)
{
c++;
}
}
}
alert('Total Checked = ' + c);
回答by Swarne27
Try out,
试用，
var boxes = $('input[name="cbox[]"]:checked');
find how many are checked,
找出有多少被检查，
$(boxes).size();
or
或者
$(boxes).length();
回答by user3089154
var len = $("[name='cbox[]']:checked").length;
will work but will not work if you are directly comparing like
会工作，但如果你直接比较就不会工作
if ( $("[name='cbox[]']").length= $("[name='cbox[]']:checked").length)
回答by Affan
you also do by this
你也这样做
you have to define class for checkBox and then follow below
您必须为 checkBox 定义类，然后按照下面的操作
var chkLength = $('input.className:checked').length; alert(chkLength);
var chkLength = $('input.className:checked').length; 警报（chkLength）；
this will print your total no of checkboxes from list
这将从列表中打印您的复选框总数
回答by Nikunj K.
You may use as below as well
您也可以使用如下
$('[name=cbox\[\]]:checked').length
