How to Dynamically Update Fees Based on Radio Buttons in WooCommerce Checkout Using Ajax?

Update Fee Dynamically Based on Radio Buttons in WooCommerce Checkout

Introduction:
When building a plugin for WooCommerce, the need to dynamically update fees based on user selections arises. This can be achieved by adding fees to the WC_Cart object, but the best approach and security implications should be considered. This article explores how to add a packaging fee based on the selected option and discusses the best practices for achieving this.

Ajax Approach:
The preferred method for updating fees dynamically is via Ajax. This allows the page to be modified without reloading, creating a seamless user experience. The provided code demonstrates how to:

• Create an Ajax listener for changes in the radio buttons.
• Submit the selected option via Ajax.
• Update the WC_Cart with the selected packaging fee.

Radio Button Customization:
The provided code customizes the checkout review order page to include radio buttons for packing options. It displays the price alongside each option, enhances styling, and ensures that the selected option is displayed in the session.

Server-Side Processing:
The PHP Ajax handler receives the chosen packaging option, sanitizes it, and saves it to the WC session. This ensures that the selected option is available for subsequent actions.

Additional Notes:

• This approach works for both logged-in and guest users.
• It has been tested on the latest WooCommerce version 3.7.x.
• It's important to remove any existing customizations related to radio buttons and packaging options before implementing this code.

Conclusion:
This Ajax-based approach provides a robust and secure method for dynamically updating fees based on user selections in the WooCommerce checkout. By customizing radio buttons and handling the Ajax request, the packaging fee is updated seamlessly without requiring page reloads.

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