如何使元素的可见度.hide(), .show(),或.toggle()?
如果一个元素是visible或hidden?
当前回答
jQuery 解决方案, 但对于想更改按钮文字的人来说,
$(function(){
$("#showHide").click(function(){
var btn = $(this);
$("#content").toggle(function () {
btn.text($(this).css("display") === 'none' ? "Show" : "Hide");
});
});
});<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button id="showHide">Hide</button>
<div id="content">
<h2>Some content</h2>
<p>
What is Lorem Ipsum? Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged.
</p>
</div>其他回答
$(document).ready(function() {
if ($("#checkme:hidden").length) {
console.log('Hidden');
}
});<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="checkme" class="product" style="display:none">
<span class="itemlist"><!-- Shows Results for Fish --></span> Category:Fish
<br>Product: Salmon Atlantic
<br>Specie: Salmo salar
<br>Form: Steaks
</div>缩略:visible根据j 查询文档:
- 他们有一个CSS
display价值的数值none.- 它们是构成元素的构成元素,
type="hidden".- 它们的宽度和高度明确定为0。
- 隐藏了祖先元素,所以该元素不在页面上显示。
具有下列要素的要件要件:
visibility: hidden或opacity: 0认为是可见的,因为它们仍在布局中消耗空间。
在某些情况中,这有用,而在另一些情况中则无用,因为如果你想检查该元素是否可见(如果您想检查该元素是否可见) 。display != none无视家长的能见度 你会发现.css("display") == 'none'不仅速度更快,而且还会正确返回可见度检查。
如果您要检查可见度而不是显示, 您应该使用 :.css("visibility") == "hidden".
也考虑到附加 jQuery 注释:
因为
:visible是 jQuery 扩展名,不属于 CSS 规格的一部分,使用:visible无法利用本地DOM提供的绩效提升querySelectorAll()方法。在使用:visible选择元素,首先使用纯 CSS 选择器选择元素,然后使用.filter(":visible").
而且,如果你对工作表现很关心,你应该检查一下现在你看到我... 表现/隐藏表现(2010-05-04)。并使用其他方法显示和隐藏元素。
jQuery 解决方案, 但对于想更改按钮文字的人来说,
$(function(){
$("#showHide").click(function(){
var btn = $(this);
$("#content").toggle(function () {
btn.text($(this).css("display") === 'none' ? "Show" : "Hide");
});
});
});<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button id="showHide">Hide</button>
<div id="content">
<h2>Some content</h2>
<p>
What is Lorem Ipsum? Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged.
</p>
</div>这里有一个永久有条件的表达式 来检查元素的状态 然后切换它:
$('someElement').on('click', function(){ $('elementToToggle').is(':visible') ? $('elementToToggle').hide('slow') : $('elementToToggle').show('slow'); });
您可以使用这个:
$(element).is(':visible');
示例代码
$(document).ready(function()
{
$("#toggle").click(function()
{
$("#content").toggle();
});
$("#visiblity").click(function()
{
if( $('#content').is(':visible') )
{
alert("visible"); // Put your code for visibility
}
else
{
alert("hidden");
}
});
});<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.2/jquery.min.js"></script>
<p id="content">This is a Content</p>
<button id="toggle">Toggle Content Visibility</button>
<button id="visibility">Check Visibility</button>