Javascript 如果所有子DIV都隐藏，如何隐藏父DIV（显示：无）

我有这个HTML块

<div class="abc">
<div class="xyz" style="display: none;">{.......}</div>
<div class="xyz" style="display: none;">{.......}</div>
<div class="xyz" style="display: none;">{.......}</div>
<div class="xyz" style="display: none;">{.......}</div>
<div class="xyz" style="display: none;">{.......}</div>
</div>

{.......}
{.......}
{.......}
{.......}
{.......}

所以，如果所有的子div都被隐藏，那么我想在一些JS操作中隐藏父div（.ABC）

感谢使用伪类选择器并基于可见div的计数显示。可以使用方法根据布尔值切换可见性

$（'.abc'）。切换（$（'.xyz:visible'）。长度！=0）

{.......}
{.......}
{.......}
{.......}
{.......}
试试这个：

$(document).ready(function(){
  var children = $(".abc").find($('.xyz'));
  if($(children).is(":hidden")){
    $(".abc").hide();
  }
  else{
    $(".abc").show();
  }

});

这里是
试试这个：

$('#btn_hide').click(function(){
var status = 0;
$('.xyz').each(function(){
 if($(this).is(":visible")){
   alert('Do not hide abc');
   status = 0;
 } else 
 {
  status = 1;
 }
})
if(status == 1){
$('.abc').hide();
} else
{
$('.abc').show();
}
})

<div class="abc">asdas
<div class="xyz" style="display: none;">{.......}</div>
<div class="xyz" style="display: none;">{.......}</div>
<div class="xyz" style="display: none;">{.......}</div>
<div class="xyz" style="display: none;">{.......}</div>
<div class="xyz" style="display: none;">{.......}</div>
</div>

<input type="button" id="btn_hide" value="Hide">

$（'btn_hide'）。单击（函数（）{
var状态=0；
$（'.xyz'）。每个（函数（）{
如果（$（this）.is（“：可见”））{
警报（“不要隐藏abc”）；
状态=0；
}否则
{
状态=1；
}
})
如果（状态==1）{
$（'.abc'）.hide（）；
}否则
{
$（'.abc'）.show（）；
}
})
阿斯达斯
{.......}
{.......}
{.......}
{.......}
{.......}

工作演示：

您可以使用JavaScript进行检查，如果带有
xyz
类的所有元素的显示样式为：none，则隐藏父元素，否则不执行任何操作


if（$（'.xyz'）.css（'display'）=='none'）{
$（'.abc'）.hide（）；
}
.abc{
宽度：100px；
高度100px；
背景：红色；
}

ABC部
{.......}
{.......}
{.......}
{.......}
{.......}
遍历所有子dom元素，检查显示样式并更新状态


$（函数（）{
var=true；
$（“按钮”）。单击（函数（）{
$（'.xyz'）。每个（函数（索引，项）{
log（$（item.css（“display”））；
如果（$（项）.css（“显示”）！=“无”）{
hid=假；
}
}).promise（）.done（函数（））{
if（hid==true）{
console.log（“真”）；
$（'.abc'）.hide（）；
}
});
})  
})

{.......}
{.......}
{.......}
{.......}
{.......}
单击
一种方法，在这里我们使用一个
单击
事件，因为您没有给出关于如何隐藏子元素的信息，如下所示：

function toggleOnHiddenChildren() {

  // here we set the the CSS 'display' property
  // via the HTMLElement.style interface,
  // using a conditional ('ternary') operator:
  this.style.display = 

    // here we use Array.prototype.slice(), along
    // with Function.prototype.call(), to convert
    // the NodeList of the 'this.children' into an
    // Array, and then use Array.prototype.every()
    // to iterate over that Array in order to test
    // whether all elements match the supplied
    // test:
    Array.prototype.slice.call(this.children).every(function(child) {

    // we're using window.getComputedStyle() in order
    // to obtain the CSS display property-value regardless
    // of whether the style was set as an inline style
    // (as it would be if directly applied by JavaScript)
    // or via a stylesheet (as it would be if the style was
    // applied via the use of a class-name).
    // if the display property-value is 'none' (the element
    // is hidden) then this returns Boolean true, if all elements
    // return true then the Array.prototype.every() method
    // also returns true, which then causes the display of
    // the 'this' element to be set to 'none', otherwise to
    // 'block':
    return window.getComputedStyle(child, null).display === 'none';
  }) ? 'none' : 'block';
}

// creating an Array of the <div> elements with the class-
// name of 'abc':
var abcElements = Array.prototype.slice.call(
    document.querySelectorAll('div.abc')
);

// iterating over the Array of elements using
// Array.prototype.forEach():
abcElements.forEach(function(abc){
  // 'abc' : a reference to the current element of the
  //         Array of elements over which we're iterating.

  // here we add an event-listener for the 'click' event
  // which calls the named function as the event-handler
  // (note the deliberate lack of parentheses):
  abc.addEventListener('click', toggleOnHiddenChildren);
});

.abc{
边框：2倍实心#000；
高度：2米；
背景色：#f90；
}

{.......}
{.......}
{.......}
{.......}
{.......}
向我们展示您迄今为止所做的尝试—您是否使用javascript动态隐藏子对象？在堆栈溢出问题上，最好添加一个解释，说明您的解决方案为什么应该有效。欲了解更多信息，请阅读此
$('#btn_hide').click(function(){
var status = 0;
$('.xyz').each(function(){
 if($(this).is(":visible")){
   alert('Do not hide abc');
   status = 0;
 } else 
 {
  status = 1;
 }
})
if(status == 1){
$('.abc').hide();
} else
{
$('.abc').show();
}
})

<div class="abc">asdas
<div class="xyz" style="display: none;">{.......}</div>
<div class="xyz" style="display: none;">{.......}</div>
<div class="xyz" style="display: none;">{.......}</div>
<div class="xyz" style="display: none;">{.......}</div>
<div class="xyz" style="display: none;">{.......}</div>
</div>

<input type="button" id="btn_hide" value="Hide">

function toggleOnHiddenChildren() {

  // here we set the the CSS 'display' property
  // via the HTMLElement.style interface,
  // using a conditional ('ternary') operator:
  this.style.display = 

    // here we use Array.prototype.slice(), along
    // with Function.prototype.call(), to convert
    // the NodeList of the 'this.children' into an
    // Array, and then use Array.prototype.every()
    // to iterate over that Array in order to test
    // whether all elements match the supplied
    // test:
    Array.prototype.slice.call(this.children).every(function(child) {

    // we're using window.getComputedStyle() in order
    // to obtain the CSS display property-value regardless
    // of whether the style was set as an inline style
    // (as it would be if directly applied by JavaScript)
    // or via a stylesheet (as it would be if the style was
    // applied via the use of a class-name).
    // if the display property-value is 'none' (the element
    // is hidden) then this returns Boolean true, if all elements
    // return true then the Array.prototype.every() method
    // also returns true, which then causes the display of
    // the 'this' element to be set to 'none', otherwise to
    // 'block':
    return window.getComputedStyle(child, null).display === 'none';
  }) ? 'none' : 'block';
}

// creating an Array of the <div> elements with the class-
// name of 'abc':
var abcElements = Array.prototype.slice.call(
    document.querySelectorAll('div.abc')
);

// iterating over the Array of elements using
// Array.prototype.forEach():
abcElements.forEach(function(abc){
  // 'abc' : a reference to the current element of the
  //         Array of elements over which we're iterating.

  // here we add an event-listener for the 'click' event
  // which calls the named function as the event-handler
  // (note the deliberate lack of parentheses):
  abc.addEventListener('click', toggleOnHiddenChildren);
});