How Can I Easily Get the Value of a Selected Radio Button in JavaScript?

Get Selected Radio Button Value with Ease

Getting the value of a selected radio button using JavaScript can be tricky at times. This article will delve into a simple yet efficient solution to this common problem, ensuring you can retrieve the selected value effortlessly.

A Misguided Solution

The code provided in the initial query attempts to find the selected radio button value, but it contains a subtle error. The variable sizes is incorrectly assigned as test instead of the array of radio buttons:

var test = 'document.theForm.' + field;
var sizes = test;

Correcting this mistake ensures that you can iterate over the array of radio buttons and retrieve the value of the selected element.

A Simple and Universal Solution

For a more concise and cross-browser compatible solution, consider using the document.querySelector method:

document.querySelector('input[name="genderS"]:checked').value;

This code selects the first input element with the name "genderS" that is currently checked and returns its value. The beauty of this method is that it works seamlessly with all major browsers, giving you peace of mind that your code will function as intended.

Embracing the Solution

Integrating this solution into your code is straightforward. Simply replace the existing findSelection function with the following:

function findSelection(field) {
  return document.querySelector('input[name="' + field + '"]:checked').value;
}

Enjoy Simplified Radio Button Value Retrieval

With these enhancements, you can now effortlessly retrieve the value of the selected radio button in your JavaScript program. The provided solutions offer flexibility and reliability, allowing you to confidently develop robust and efficient web applications.

The above is the detailed content of How Can I Easily Get the Value of a Selected Radio Button in JavaScript?. For more information, please follow other related articles on the PHP Chinese website!