woocommerce-paypal-payments/modules/ppcp-paypal-subscriptions/resources/js/paypal-subscription.js

document.addEventListener(
    'DOMContentLoaded',
    () => {
        const variations = document.querySelector('.woocommerce_variations');
        const disableFields = (productId) => {
            if(variations) {
                const children = variations.children;
                for(let i=0; i < children.length; i++) {
                    const variableId = children[i].querySelector('h3').getElementsByClassName('variable_post_id')[0].value
                    if (parseInt(variableId) === productId) {
                        children[i].querySelector('.woocommerce_variable_attributes')
                            .getElementsByClassName('wc_input_subscription_period_interval')[0]
                            .setAttribute('disabled', 'disabled');
                        children[i].querySelector('.woocommerce_variable_attributes')
                            .getElementsByClassName('wc_input_subscription_period')[0]
                            .setAttribute('disabled', 'disabled');
                        children[i].querySelector('.woocommerce_variable_attributes')
                            .getElementsByClassName('wc_input_subscription_trial_length')[0]
                            .setAttribute('disabled', 'disabled');
                        children[i].querySelector('.woocommerce_variable_attributes')
                            .getElementsByClassName('wc_input_subscription_trial_period')[0]
                            .setAttribute('disabled', 'disabled');
                        children[i].querySelector('.woocommerce_variable_attributes')
                            .getElementsByClassName('wc_input_subscription_length')[0]
                            .setAttribute('disabled', 'disabled');
                    }
                }
            }

            const periodInterval = document.querySelector('#_subscription_period_interval');
            periodInterval.setAttribute('disabled', 'disabled');

            const subscriptionPeriod = document.querySelector('#_subscription_period');
            subscriptionPeriod.setAttribute('disabled', 'disabled');

            const subscriptionLength = document.querySelector('._subscription_length_field');
            subscriptionLength.style.display = 'none';

            const subscriptionTrial = document.querySelector('._subscription_trial_length_field');
            subscriptionTrial.style.display = 'none';
        }

        const setupProducts = () => {
            PayPalCommerceGatewayPayPalSubscriptionProducts?.forEach((product) => {
                if(product.product_connected === 'yes') {
                    disableFields(product.product_id);
                }

                const unlinkBtn = document.getElementById(`ppcp-unlink-sub-plan-${product.product_id}`);
                unlinkBtn?.addEventListener('click', (event)=>{
                    event.preventDefault();
                    unlinkBtn.disabled = true;
                    const spinner = document.getElementById('spinner-unlink-plan');
                    spinner.style.display = 'inline-block';

                    fetch(product.ajax.deactivate_plan.endpoint, {
                        method: 'POST',
                        headers: {
                            'Content-Type': 'application/json'
                        },
                        credentials: 'same-origin',
                        body: JSON.stringify({
                            nonce: product.ajax.deactivate_plan.nonce,
                            plan_id: product.plan_id,
                            product_id: product.product_id
                        })
                    }).then(function (res) {
                        return res.json();
                    }).then(function (data) {
                        if (!data.success) {
                            unlinkBtn.disabled = false;
                            spinner.style.display = 'none';
                            console.error(data);
                            throw Error(data.data.message);
                        }

                        const enableSubscription = document.getElementById('ppcp-enable-subscription');
                        const product = document.getElementById('pcpp-product');
                        const plan = document.getElementById('pcpp-plan');
                        enableSubscription.style.display = 'none';
                        product.style.display = 'none';
                        plan.style.display = 'none';

                        const enable_subscription_product = document.getElementById('ppcp_enable_subscription_product');
                        enable_subscription_product.disabled = true;

                        const planUnlinked = document.getElementById('pcpp-plan-unlinked');
                        planUnlinked.style.display = 'block';

                        setTimeout(() => {
                            location.reload();
                        }, 1000)
                    });
                });
            })
        }

        setupProducts();
        jQuery( '#woocommerce-product-data' ).on('woocommerce_variations_loaded', () => {
            setupProducts();
        });
    });