Subscribe for email: Checkout as guest

An extension is created in SC standard where a checkbox is displayed and checked by default for email subscription

//Create an extension with js and template. You need to override the checkout as guest template, we have used _.extend method. However, you can use methods provided by extensiblity API

define(
    'JobinAndJismiITServices.SubscribeInCheckout.CheckoutAsGuest', [
        'LoginRegister.CheckoutAsGuest.View', 'jobinandjismiitservices_subscribeincheckout_checkoutasguest.tpl', 'Utils', 'Backbone', 'jQuery', 'underscore'
    ],
    function(
        LoginRegisterCheckoutAsGuestView, CheckoutAsGuestViewTPL, Utils, Backbone, jQuery, _
    ) {
        'use strict';

        return {
            mountToApp: function mountToApp(container) {
                // using the 'Layout' component we add a new child view inside the 'Header' existing view 
                // (there will be a DOM element with the HTML attribute data-view="Header.Logo")
                // more documentation of the Extensibility API in
                // https://system.netsuite.com/help/helpcenter/en_US/APIs/SuiteCommerce/Extensibility/Frontend/index.html

                /** @type {LayoutComponent} */
                _.extend(LoginRegisterCheckoutAsGuestView.prototype, {
                    template: CheckoutAsGuestViewTPL
                });

            }
        };
    });

Add the below HTML code to the template and SCA will check the email subscription by default

<div class="login-register-register-form-controls-group">
            <label class="login-register-register-form-label checkbox-container">
                <input type="checkbox" name="emailsubscribe" id="register-emailsubscribe" value="T" checked="checked">
                 <span class="checkmark"></span>
                Keep me up to date on news and exclusive offers
            </label>
        </div>