How to determine whether an object is empty in jquery

Jquery method to determine whether an object is empty: You can determine based on the length attribute of the dom object, such as [obj.length == 0]. If it is a custom object, you can use the isEmptyObject method to judge.

The operating environment of this tutorial: windows10 system, jquery3.2.1 version. This method is suitable for all brands of computers.

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Jquery method to determine whether the object is empty:

1. There are two types of jquery objects, one is the dom object, the dom object will have its own length attribute, so in this case:

obj.length == 0

can determine that the object is empty

2, jquery can also Custom objects, such as var obj = {}. In this case, the object defined will not have a length attribute, so you need to use the jquery method: $.isEmptyObject()

if($.isEmptyObject(obj) == true){
　　　　console.log("对象为空");
　　}else{
　　　　console.log("对象非空");
　　}

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