How Can I Check Radio Buttons Using jQuery?

Checking Radio Buttons with jQuery: A Comprehensive Guide

Your question regarding jQuery's inability to check radio buttons highlights a common challenge. Let's delve into the issue and explore various solutions.

jQuery Codes and Limitations

The codes you provided attempt to select the radio button with the value of '1' using different selectors. However, these approaches have limitations with jQuery versions.

Solution for jQuery >= 1.6

For versions of jQuery equal to or above (>=) 1.6, the correct way to check a radio button is with the prop() method:

$("#radio_1").prop("checked", true);

Solution for jQuery < 1.6

Prior to version 1.6, jQuery used the attr() method to check radio buttons:

$("#radio_1").attr('checked', 'checked');

Tip for Post-Checking Actions

After checking the radio button, you may consider triggering the click() or change() event to ensure proper updates and callbacks.

Example:

$("#radio_1").prop("checked", true).click();

By applying the appropriate method based on your jQuery version, you can effectively check radio buttons using jQuery.

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