How to determine whether a radio button is selected in jquery

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

The operating environment of this tutorial: windows7 system, jquery3.2.1 version, Dell G3 computer. This method is suitable for all brands of computers.

Jquery method to determine whether a radio button is selected:

The 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();

2. Get the id when clicking the button

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

Related learning recommendations:javascript learning tutorial

The above is the detailed content of How to determine whether a radio button is selected in jquery. For more information, please follow other related articles on the PHP Chinese website!