Question

附带的代码正确返回ID和复选框的值。我需要获取封闭div的ID，以便可以将display属性设置为hidden。

<!DOCTYPE html>

<html>
<head>
</head>
<body>
    <div id="wrapper">
        <form>
            <div id="boatdiv1"><input type="checkbox" name="cb" id="boat1" value="123" onclick='doClick();'><label for='boat1'>boat1</label><br></div>
            <div id="boatdiv2"><input type="checkbox" name="cb" id="boat2" value="456" onclick='doClick();' onclick='doClick();'><label for='boat2'>boat2</label><br></div>
            <div id="boatdiv3"><input type="checkbox" name="cb" id="boat3" value="789" onclick='doClick();'><label for='boat3'>boat3</label><br></div>
        </form>
    </div>


</body>
<script>
    function doClick() {
        var checkedValue = null; 
        var inputElements = document.getElementsByName('cb');
        for(var i=0; inputElements[i]; ++i){
              if(inputElements[i].checked){
                   checkedValue = inputElements[i].value;
                   checkedID = inputElements[i].id;
                   console.log('checked id = '+checkedID);
                   console.log('value = '+checkedValue);
                   break;
              }
        }
              ParentID = checkedID.offsetParent;
              console.log(ParentID.id);
    }
</script>
</html>

我希望ParentID将返回ID。相反，我收到错误消息“ TypeError：undefined不是对象（正在评估'ParentID.id'）”

Answer 1

您需要删除onevent属性，并改用onevent属性或事件侦听器：

<input ~~doClick（）~~ ...>

基本上，这是隐藏单击元素（event.target）的父元素所需要的：

event.target.parentElement.style.display = 'none';

演示

演示中评论的详细信息

// Reference the form 
var form = document.forms[0];

// Register the form to the change event
form.onchange = hide;

/*
Called when a user unchecks/checks a checkbox
event.target is always the currently clicked/changed tag
Get the changed parent and set it at display: none
*/
function hide(e) {
  var changed = e.target;
  changed.parentElement.style.display = 'none';
  console.log(`Checkbox: ${changed.id}: ${changed.value}`);
  console.log(`Parent: ${changed.parentElement.id}`);
}

<!DOCTYPE html>
<html>

<head></head>

<body>
  <div id="wrapper">
    <form>
      <div id="boatdiv1"><input type="checkbox" name="cb" id="boat1" value="123"><label for='boat1'>boat1</label><br></div>
      <div id="boatdiv2"><input type="checkbox" name="cb" id="boat2" value="456"><label for='boat2'>boat2</label><br></div>
      <div id="boatdiv3"><input type="checkbox" name="cb" id="boat3" value="789"><label for='boat3'>boat3</label><br></div>
    </form>
  </div>
</body>

</html>

Answer 2

使用parentNode-还请注意checkedID是一个字符串，因此它没有父级。使用getElementById获取选中的输入：

ParentID = document.getElementById(checkedID).parentNode;
console.log(ParentID.id);

如何在此函数中获取父ID？

2 个答案:

演示