Automatically selects the only available 'Avada Button' type variation for WooCommerce products on the Avada theme.

variations.js

(function(window, document, $) {
	'use strict';

	function handleVariationChange() {
		$('.variations_form .avada-select-wrapper').each(function() {
			const $wrapper = $(this);
			const $buttons = $wrapper.find('.avada-button-select:not([data-disabled="true"])');
			const $checkedButtons = $buttons.filter('[data-checked="true"]');

			if ($buttons.length === 1 && !$buttons.attr('data-prevent-auto-select')) {
				$buttons.click();
			} else if ($checkedButtons.length > 0 && !$checkedButtons.attr('data-prevent-auto-select')) {
				$checkedButtons.click();
			}
		});
	}

	function markPreselectedButtons() {
		$('.avada-button-select[data-checked="true"]').attr('data-prevent-auto-select', 'true');
	}

	$(document).ready(function() {
		let clickedVariation = false;
		
		markPreselectedButtons();

		$('.variations_form').on('woocommerce_variation_has_changed', function() {
			if (clickedVariation) {
				setTimeout(handleVariationChange, 500);
			}
		});

		$('.avada-button-select').on('click', function() {
			clickedVariation = true;
			const $button = $(this);
			$button.attr('data-prevent-auto-select', 'true');
			$button.closest('.avada-select-wrapper').find('.avada-button-select').not(this).removeAttr('data-prevent-auto-select');
		});
	});

})(window, document, jQuery);