jquery radio button selected unchecked

Radio buttons are often used in web development, and jQuery provides a simple and easy-to-use method for the interactive operation of this element.

The following will introduce how to use jQuery to select and uncheck the radio button.

1. Check the radio button

To select the radio button, we need to use the attr() method to add the checked attribute to the radio button element and set its value is true.

For example, assuming we have a radio button element with the id of radio1, we can implement the selection operation through the following code:

$('#radio1').attr('checked', true);

2. Uncheck the radio button

It is also very simple to cancel the checked state of the radio button. You only need to set the value of the checked attribute to false.

Continuing to take the above example as an example, we can uncheck the operation through the following code:

$('#radio1').attr('checked', false);

3. Binding event

In some cases, We need to monitor the user's operation on the radio button and perform corresponding processing based on the operation. At this time, you can use jQuery's event binding function.

Taking selection and deselection as an example, we can bind a click event to monitor the user's operation. When binding an event, you need to specify the element to listen to and the action to perform.

For example, continuing to take the radio button with the id of radio1 as an example, we can use the following code to implement the binding event:

$('#radio1').click(function() { if ($(this).is(':checked')) { // 选中 // do something } else { // 取消选中 // do something } });

In the above code, we use the is() method to Determine the selected state of the radio button. If the selected status is true, perform the selection operation, otherwise perform the unselect operation.

4. Batch operation

In some cases, we need to operate multiple radio button boxes at the same time, such as selecting all or canceling all. At this time, you can use jQuery's selector and each() method to perform batch operations on multiple radio button boxes.

For example, suppose we have three radio button elements, and their class names are all radio. We can use the following code to select all operations:

$('.radio').each(function() { $(this).attr('checked', true); });

In the above code, we use a class selector to select all radio button elements, and use the each() method to traverse them, and then use attr( ) method sets its selected status to true.

Similarly, we can also use the following code to cancel all selections:

$('.radio').each(function() { $(this).attr('checked', false); });

5. Summary

Through the above introduction, we can find that using jQuery Operating radio buttons is very simple. Selecting and unchecking operations can be easily implemented through the attr() method, user operations can be monitored through event binding, and batch operations can be implemented through the selector and each() method.

In actual development, we need to reasonably use these methods according to needs to achieve better user experience and development efficiency.

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