How to validate at least one Checkbox is checked using JQuery?

Question

Hear is my code:

<div class="reminderDiv">
    <input type="checkbox" class="require-one" id="lmrText"  name="lmrText"><label>Text Message</label>&nbsp;&nbsp;&nbsp;
    <input type="checkbox" class="require-one" id="lmrPhone" name="lmrPhone"><label>Phone</label>
    <input type="checkbox" class="require-one" id="lmrEmail" name="lmrEmail"><label>Email</label>
</div>

Using JQuery, how can I determine if at least one checkbox is selected?

Answer 1

$(".reminderDiv :checked").length > 0

如果至少选中一个复选框，则为true 。

Answer 2

if($('.require-one:checked').length > 0)
{
   // at least one checkbox was checked
}
else
{
  // no checkbox was checked
}

JSFIDDLE

Answer 3

if($('input[type=checkbox]').is(':checked')==true) {
    alert("Your data");
}

Answer 4

if($('.require-one:checked').size() === 0){
{
    //your code here
}