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How to determine whether an element is hidden in jquery

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coldplay.xixiOriginal
2020-12-24 12:06:072838browse

Jquery method to determine whether an element is hidden: 1. Use CSS attributes, the code is [var display =$('#id').css('display');]; 2. Use jquery's built-in selector , the code is [if($("#test").is(":hidden")].

How to determine whether an element is hidden in jquery

The operating environment of this tutorial: windows7 system, jquery3 .2.1 version, DELL G3 computer.

Recommendation: jquery video tutorial

jquery method to determine whether an element is hidden:

1: Use CSS attributes

The code is as follows:

var display =$('#id').css('display');
if(display == 'none'){
   alert("被你发现了,我是隐藏的啦!");
}

2: Use jquery built-in selector

Assume our page There is such a label,

The code is as follows:

<div id="test">
<p>仅仅是测试所用</p>
</div>

Then, we can use the following statement to determine whether the label with the id "test" is hidden:

The code is as follows:

if($("#test").is(":hidden")){...} //前提是已经将jQuery的库导进来了

In this way, we can easily determine whether an element is hidden and set animations according to its status. For example:

The code is as follows:

if($("#test").is(":hidden")){
       $("#test").show();    //如果元素为隐藏,则将它显现
}else{
      $("#test").hide();     //如果元素为显现,则将其隐藏
}

3 : jQuery determines whether the element is displayed or hidden

The code is as follows:

var node=$(&#39;#id&#39;);

The first way of writing

The code is as follows:

if(node.is(&#39;:hidden&#39;)){  //如果node是隐藏的则显示node元素,否则隐藏
  node.show(); 
}else{
  node.hide();
}

The code for the second way of writing

is as follows:

if(!node.is(&#39;:visible&#39;)){  //如果node是隐藏的则显示node元素,否则隐藏
  node.show(); 
}else{
  node.hide();
}
if(node.is(&#39;:visible&#39;)){  //如果node是显示的则隐藏node元素,否则显示
  node.hide();
}else{
  node.show();
}

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