How to determine whether the radio button radio is selected in jquery

Jquery method to determine whether the radio button radio is selected: 1. Get the id when loading the page, the code is [var fs=$("#" id).val()]; 2. Click the button When getting the id, the code is [var id= $(this).attr("id")].

The operating environment of this tutorial: Windows 7 system, jquery version 3.2.1. This method is suitable for all brands of computers.

How jquery determines whether the radio button radio is selected:

The example in this article describes how jquery determines whether the radio button radio is selected. Share it with everyone for your reference. The details are as follows:

html code is as follows:

1. Get the id

$("input[type='radio']").each(function(){ var id= $(this).attr("id"); if($("#"+id).attr("checked")=="checked"){ var fs=$("#"+id).val(); } }); var s1 = $(".aa:checked").val(); // .aa 为class var s2 = $("input[name='ra']:checked").val();

when loading the page 2. Get the id

$(function(){ $("input[type='radio']").click(function(){ var id= $(this).attr("id"); alert(id); }); });

when you click the button

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