How does jquery determine whether the radio is selected

The method of jquery to determine whether the radio is selected: 1. Use the selected value to determine the selected; 2. Use the checked attribute to determine the selected; 3. Jquery to obtain the value of the radio radio button; 4. Set the radio button to be selected.



The operating environment of this tutorial: windows7 system, jquery 3.2.1 version, this method is applicable to all brand computers.

Recommendation: jquery video tutorial How to

judge whether a radio is selected by jquery:

1. Use the selected value to determine the selected value and

directly upload the code, don’t forget to quote the JQuery package. The

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Radio cannot be judged by "checked" equality, only use true to judge The

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2. Use the checked attribute to judge the selected

radio cannot be judged by the equality of "checked", only use true to judge the

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Three, jquery obtains the value of the radio button.

Another: judge whether the radio is selected and obtain the selected value. The

code is as follows:

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function checkradio(){ var item = $(":radio:checked"); var len=item.length; if(len>0){   alert("yes--The selected value is: "+$(":radio:checked").val()); } } Fourth, set the radio button to be The selected code is as follows: 1 $("input[type=radio]").attr("checked",'2');//Set the item with value=2 as the currently selected item. Related free learning recommendations: javascript (video)