H5 activates payment within WeChat

Documentation: https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=7_7&index=6

Required parameters:

export default {
  name: "friendPays",
  data() {
    return {
      // 是否支付成功
      isPaySuccess: false
    };
  },

 payClick() {
    // 是否支付成功--文字提示  
    if (this.isPaySuccess) {
        return;
      }
      if (typeof WeixinJSBridge == "undefined") {
        if (document.addEventListener) {
          document.addEventListener(
            "WeixinJSBridgeReady",
            this.onBridgeReady,
            false
          );
        } else if (document.attachEvent) {
          document.attachEvent("WeixinJSBridgeReady", this.onBridgeReady);
          document.attachEvent("onWeixinJSBridgeReady", this.onBridgeReady);
        }
      } else {
        this.onBridgeReady();
      }
    },

onBridgeReady() {
       //调起支付接口
      this.$http.getPay(window.location.search).then(Response => {
        if (Response.code === this.$http_status.success) {
          WeixinJSBridge.invoke(
            "getBrandWCPayRequest",
            {
              appId: Response.data.appId, //公众号名称，由商户传入
              timeStamp: String(Response.data.timeStamp), //时间戳
              nonceStr: Response.data.nonceStr, //随机串
              package: Response.data.package,
              signType: Response.data.signType, //微信签名方式：
              paySign: Response.data.paySign //微信签名
            },
            res => {
              if (res.err_msg === "get_brand_wcpay_request:ok") {
                //支付成功
                this.isPaySuccess = true;
                // that.$router.replace({ name: "paymentend" });
              } else if (res.err_msg === "get_brand_wcpay_request:cancel") {
                 $.toast("支付取消!", "text");
                // alert("支付取消!");
              } else {
                 $.toast("支付失败!", "text");
                // alert("支付失败!");
              }
            }
          );
        }
      });
    }