jquery determines whether radio is selected

Jquery method to determine whether the radio is selected: first use the "$('input:radio:checked').val();" method to get the value in the radio; then determine whether the radio is empty Just check it or not.

The operating environment of this article: windows7 system, jquery1.2.6 version, Dell G3 computer.

How to determine whether the radio is selected in jquery?

JQuery determines whether the radio is selected and obtains the selected value:

       
  
 男 女 
 十分满意 满意 不满意 非常差 
  
  

The above code uses the $('input:radio:checked').val(); method to obtain The value in radio, and then determine whether the radio is selected by judging whether the radio is empty.

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