How to remove the value of a radio button using jQuery

With the rapid development of web applications, more and more web pages need to use JavaScript to achieve interactive effects. As a commonly used JavaScript library, jQuery provides a series of functions and methods, which greatly reduces the amount of JavaScript written and also improves the readability and maintainability of the code. This article will introduce how to use jQuery to remove the value of a radio button.

1. Basic knowledge of radio buttons

In front-end development, radio buttons are a commonly used form element that can be used to allow users to select one of several options. The HTML code is as follows:

<input type="radio" name="sex" value="male">男
<input type="radio" name="sex" value="female">女

Among them, the type attribute is set to "radio", indicating that this is a radio button; the name attribute is set to "sex", indicating that both radio buttons belong to the same group. Only one of them can be selected; the value attributes are set to "male" and "female" respectively, which means that when male or female is selected, the values ​​passed to the background are "male" and "female" respectively.

2. Use jQuery to remove the value of the radio button

In web applications, sometimes we need to dynamically modify the values ​​of form elements. How to remove the value of a radio button using jQuery? The following is the specific code implementation:

$(document).ready(function(){
    $("input[type='radio']").click(function(){
        if($(this).is(":checked")){
            $("input[name='"+$(this).attr("name")+"']").removeAttr("checked");
            $(this).attr("checked","checked");
        }else{
            $(this).removeAttr("checked");
        }
    });
});

In the above code, jQuery's ready() method is first used to ensure that the document (i.e., DOM tree) is completely loaded before executing subsequent code. Then, use the $("input[type='radio']") selector to select all form elements of type "radio" and bind a click event.

In the click event, first determine whether the current radio button has been selected (that is, whether it has the checked attribute). If so, use the $("input[name='" $(this).attr("name") "']") selector to select all form elements whose name attribute is equal to the name attribute of the current radio button, and Use the removeAttr("checked") method to remove their checked attribute. Then, set the checked attribute of the current radio button to "checked". If not, simply remove the checked attribute of the current radio button.

In short, through the above code implementation, the value of the radio button can be dynamically modified, and the code is very concise and easy to understand.

3. Summary

This article mainly introduces the method of using jQuery to remove the value of radio buttons in front-end development. By dynamically modifying the value of the radio button, we can achieve many dynamic effects, giving users a better experience when operating the web page. I hope this article can be helpful to readers.

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