检查radiobutton

Question

我试图在控制台上看到哪个单选按钮被选中。有两个单选按钮。我收到此错误TypeError：document.getElementById（...）为null我应该使用checked feauture而不是value？

<input required="required" class="form-radio" id="edit-1" name="submitted[315]" value="1" type="radio">

<input required="required" class="form-radio" id="edit-2" name="submitted[315]" value="2" checked="checked" type="radio">



var y=document.getElementById('edit-2').value;
if(y == 2)
{


console.log("no");

} else{
console.log("yes");


}

Answer 1

确保执行脚本时String sql=select * from PunchHistory whered punchDate like :date1; String date="2017-10-23"; List<PunchHistory> results =session.createQuery(StackperksConstants.sql) .setDate("date1", java.sql.Date.valueOf(date)) .list(); 字段存在。 否则，使用id="edit-2"函数，如：

document.ready

Answer 2

似乎是这样的：

var y = document.getElementById('edit-2').checked;

if(y) {
  console.log("no");
} else{
  console.log("yes");
}

<input required="required" class="form-radio" id="edit-1" name="submitted[315]" value="1" type="radio">

<input required="required" class="form-radio" id="edit-2" name="submitted[315]" value="2" checked="checked" type="radio">

Answer 3

当单选按钮不在表单中时，请使用checked代替value。

var checkSelection = function () {
  if(document.getElementsByClassName('form-radio')[0].checked)
  {
    console.log("yes");
  } 
  else {
    console.log("no");
  }
}

<input required="required" class="form-radio" name="submitted[315]" type="radio"> Yes
<input required="required" class="form-radio" name="submitted[315]" type="radio" checked="checked"> No

<button onClick="checkSelection()">Check Selection</button>