wc-licensed-product/assets/js/frontend.js

/**
 * WC Licensed Product - Frontend Scripts
 *
 * @package Jeremias\WcLicensedProduct
 */

(function($) {
    'use strict';

    var WCLicensedProductFrontend = {
        init: function() {
            this.bindEvents();
        },

        bindEvents: function() {
            $(document).on('click', '.copy-license-btn', this.copyLicenseKey);
        },

        /**
         * Copy license key to clipboard
         */
        copyLicenseKey: function(e) {
            e.preventDefault();

            var $btn = $(this);
            var licenseKey = $btn.data('license-key');

            if (!licenseKey) {
                return;
            }

            // Use modern clipboard API if available
            if (navigator.clipboard && navigator.clipboard.writeText) {
                navigator.clipboard.writeText(licenseKey)
                    .then(function() {
                        WCLicensedProductFrontend.showCopyFeedback($btn, true);
                    })
                    .catch(function() {
                        WCLicensedProductFrontend.fallbackCopy(licenseKey, $btn);
                    });
            } else {
                WCLicensedProductFrontend.fallbackCopy(licenseKey, $btn);
            }
        },

        /**
         * Fallback copy method for older browsers
         */
        fallbackCopy: function(text, $btn) {
            var $temp = $('<textarea>');
            $('body').append($temp);
            $temp.val(text).select();

            try {
                var success = document.execCommand('copy');
                WCLicensedProductFrontend.showCopyFeedback($btn, success);
            } catch (err) {
                WCLicensedProductFrontend.showCopyFeedback($btn, false);
            }

            $temp.remove();
        },

        /**
         * Show feedback after copy attempt
         */
        showCopyFeedback: function($btn, success) {
            var message = success
                ? wcLicensedProduct.strings.copied
                : wcLicensedProduct.strings.copyFailed;

            var $feedback = $('<span class="copy-feedback"></span>')
                .text(message)
                .addClass(success ? 'success' : 'error');

            $btn.after($feedback);

            setTimeout(function() {
                $feedback.fadeOut(300, function() {
                    $(this).remove();
                });
            }, 1500);
        }
    };

    $(document).ready(function() {
        WCLicensedProductFrontend.init();
    });

})(jQuery);