Скачать или смотреть Solving the jQuery Challenge: Retrieving Values from Mixed Radio Buttons

Learn how to effectively get values from grouped radio buttons using `jQuery`. This guide provides a solution for calculating the product of selected responses.
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This video is based on the question https://stackoverflow.com/q/70707514/ asked by the user 'Nyoman Gunartha' ( https://stackoverflow.com/u/16000996/ ) and on the answer https://stackoverflow.com/a/70707634/ provided by the user 'FS-GSW' ( https://stackoverflow.com/u/17320082/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Solving the jQuery Challenge: Retrieving Values from Mixed Radio Buttons

In web development, working with form inputs, specifically radio buttons, can often pose challenges, especially when trying to retrieve and manipulate their values. If you've ever faced the issue of not being able to get the value of a selected radio button, you're not alone. Here, we'll dive into a common scenario where two groups of radio buttons are used, and provide a structured solution to retrieve their values correctly.

The Problem

Imagine you have two groups of radio buttons on your webpage:

Saverity - containing values like 0 and 1

Likehood - also containing values like 0 and 1

The goal is to calculate a variable r by multiplying the values of the selected radio buttons from both groups. However, you might find that when you click on a radio button, the variable r does not have an updated value – the result appears to be 0. This typically happens because the calculation for r is done outside the scope of where the values of s and l are updated.

The Solution

To solve this problem effectively, we will refactor the code and ensure the calculation of r happens right after the values for s and l are updated. Here’s how to do it step-by-step:

Step 1: Setting up the HTML

First, include the required jQuery library and set up your HTML structure with the radio buttons:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Writing the jQuery Code

Next, we'll write the jQuery code to manage state changes and perform the calculation:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Explanation of the Code

Initialization: We start by initializing three variables (s, l, and r) to 0.

Event Handling: We set up event listeners on the radio buttons. When a user selects a radio button, the value (val()) is stored in either s or l.

Recalculate Function: After updating s or l, we call the recalculate function, which updates r based on the product of s and l, outputting the value in the console.

Conclusion

With these changes, your code will now correctly handle user selections and compute the desired value passing through both groups of radio buttons. It's a simple fix, but one that can have significant impacts on the functionality of your JavaScript applications.

By keeping the code clean and organized, you enhance readability and maintainability. This is a fundamental skill every developer should strive for. Happy coding!