How to determine whether an element is hidden in jquery

Jquery method to determine whether an element is hidden: 1. Use CSS attributes, the code is [var display =$('#id').css('display')]; 2. Use jQuery to determine whether the object is displayed Grammar, the code is [$(".test").css("display].

The operating environment of this tutorial: Windows 7 system, jquery version 2.2.4, This method is applicable to all brands of computers.

Jquery method to determine whether an element is hidden:

1. Use CSS attributes

var display =$('#id').css('display');
if(display == 'none'){
   alert("none为隐藏");
}

2. jQuery determines elements

var node=$('#id');

The first way of writing

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

The second way of writing

if(node.is(':visible')){　　//如果node是显示的则隐藏node元素，否则显示
　　node.hide();
}else{
　　node.show();
}

3.jQuery determines objects Whether to display syntax

$(".test").css("display") 
$(".test").is(":visible") 
$(".test").is(":hidden") 
$(element).is(":visible") // 返回值 display:[none|block], hidden和visible:[true|false]

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