问在V2中没有paypal按钮的情况下如何添加paypal支付

EN

    var wasLoaded = false;
 function loadScript() {
    if(wasLoaded) return;
    wasLoaded = true;
    var script = document.createElement('script');
    script.type = 'text/javascript';
    document.body.appendChild(script);
    script.onload = function() {

        paypal.Buttons({

                    // Set up the transaction
                    createOrder: function(data, actions) {
                        return actions.order.create({
                            purchase_units: [{
                                amount: {
                                    value: '88.44'
                                }
                            }]
                        });
                    }, ...
                    load it to a hidden div.

    }

    script.src = 'https://www.paypal.com/sdk/js?client-id=SD&intent=capture&vault=false&commit=true';

  }