如何按名称（jquery）从组中获取至少1个选定单选按钮的布尔值

Question

如何使用 jquery 通过属性名称从单选按钮组中获取布尔值而不是实际选定的文本

Answer 1

$("input[name='MainColumn']").is(':checked')

console.log($("input[name='MainColumn']").is(':checked'));//true or false 
console.log($("input:radio[name=MainColumn]:checked").length);//0 or 1

$("input").on('click',function(){
console.log($("input[name='MainColumn']").is(':checked'));//true or false 
console.log($("input:radio[name=MainColumn]:checked").length)//0 or 1

});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input type="radio" name="MainColumn" value="male"> Male<br>
  <input type="radio" name="MainColumn" value="female"> Female<br>
  <input type="radio" name="MainColumn" value="other"> Other