WooCommerce add a custom fee using ajax to cart totals on checkout page
Finally I found a solution using a session variable to store the Ajax value and add_fee()
My ajax request:
jQuery(document).ready(function () { jQuery('#State').click(function () { if (jQuery('#ship-to-different-address-checkbox').is(':checked')) { var state = jQuery('#shipping_state').val(); var post_code = jQuery('#shipping_postcode').val(); } else { var state = jQuery('#billing_state').val(); var post_code = jQuery('#billing_postcode').val(); } console.log(state + post_code); var data = { action: 'woocommerce_apply_state', security: wc_checkout_params.apply_state_nonce, state: state, post_code: post_code }; jQuery.ajax({ type: 'POST', url: wc_checkout_params.ajax_url, data: data, success: function (code) { console.log(code);// jQuery('.woocommerce-error, .woocommerce-message').remove(); if (code === '0') {// $form.before(code); jQuery('body').trigger('update_checkout'); } }, dataType: 'html' }); return false; });});And in functions.php
wp_enqueue_script('neemo_state', get_template_directory_uri() . '/js/state_test.js', array('jquery'));wp_localize_script('neemo_state', 'wc_checkout_params', array('ajaxurl' => admin_url('admin-ajax.php')));add_action('wp_ajax_woocommerce_apply_state', 'calculate', 10);add_action('wp_ajax_nopriv_woocommerce_apply_state', 'calculate', 10);function calculate() { if (isset($_POST['state'])) { global $woocommerce; $weight = WC()->cart->cart_contents_weight; $state = $_POST['state']; if ($state === "VIC") { $val = 1; } else { $val = 2; } session_start(); $_SESSION['val'] = $val; }}add_action('woocommerce_cart_calculate_fees', 'woo_add_cart_fee');function woo_add_cart_fee() { session_start(); $extracost = $_SESSION['val']; WC()->cart->add_fee('Shipping & Handling:', $extracost);}
I had to code for accepting donation just before checkout and adding that donation amount to the cart as a fee - and to provide flexibility for user to change the donation amount any number of times before proceeding to pay. I used the following code and it worked so well. I had Donation amount and a donateNow button - <input type="button" id="donateNowBtn" value="Donate Now!"
code in function.php
add_action( 'wp_footer', 'woocommerce_click_donate_button', 80 );function woocommerce_click_donate_button() { if (is_checkout()) { ?> <script type="text/javascript"> jQuery( document ).ready(function( $ ) { $('#donateNowBtn').click(function(){ jQuery('body').trigger('update_checkout'); }); }); </script> <?php }}add_action( 'woocommerce_cart_calculate_fees', 'woo_add_cart_fee' );function woo_add_cart_fee( $cart ){ if ( ! $_POST || ( is_admin() && ! is_ajax() ) ) { return; } if ( isset( $_POST['post_data'] ) ) { parse_str( $_POST['post_data'], $post_data ); } else { $post_data = $_POST; // fallback for final checkout (non-ajax) } if (isset($post_data['donation_amount'])) { $donation_amount = $post_data['donation_amount'] ; WC()->cart->add_fee( 'Donation Amount', $donation_amount ); }}