Jquery method to determine whether an object is empty: 1. Use the dom object to determine if it is zero. If it is zero, it is empty, and the code is [obj.length == 0]; 2. Use a custom object to determine, the code is [ $.isEmptyObject()].
The operating environment of this tutorial: windows7 system, jquery3.2.1 version, Dell G3 computer.
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Jquery method to determine whether an object is empty:
1. One It is a dom object
The dom object will have a length attribute, so in this case:
obj.length == 0
You can judge that the object is empty
2. One is a custom object
such as var obj = {}. In this case, the object defined will not have a length attribute.
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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