微信瀏覽器自帶WeixinJSBridge方法直接呼叫就可以喚起微信支付

wxpay(data) {
    var ua = navigator.userAgent.toLowerCase();
    var isWeixin = ua.indexOf("micromessenger") != -1;
    pay(data).then((res) = > {
        if (res.success) {
            console.log(res.data.result);
            const pay_params = res.data.result;
            
 
if (isWeixin) {
                if (typeof WeixinJSBridge == "undefined") {
                    if (document.addEventListener) {
                        document.addEventListener("WeixinJSBridgeReady", onBridgeReady, false);
                    } else if (document.attachEvent) {
                        document.attachEvent(
 
"WeixinJSBridgeReady", onBridgeReady);
                        document.attachEvent("onWeixinJSBridgeReady", onBridgeReady);
                    }
                } else {
                    this.onBridgeReady(pay_params);
                }
            } else {
                // this.goLoginPage (pay_params)
 

            }
        } else {
            Toast.fail("微信支付調起失敗！");
        }
    }).
    catch ((err) = > {
        console.log(err);
    });
},
onBridgeReady(params) {
    const pay_params = params;
    WeixinJSBridge.invoke("getBrandWCPayRequest", {
        appId: pay_params.appId, //公眾號名稱，由商戶傳入
        timeStamp: pay_params.timeStamp, //時間戳，自1970年以來的秒數
        nonceStr: pay_params.nonceStr, //隨機串
        package: pay_params.package,
        signType: pay_params.signType, //微信簽名方式：
        paySign: pay_params.paySign, //微信簽名
    }, function(res) {
        if (res.err_msg == "get_brand_wcpay_request:ok") {
            Toast.success("支付成功！");
        }
    });
},