fastadmin在给供应商充值的时候，需要点击add.html进行新增，这里可以实现JS自动获取供应商余额，根绝变更类型，自动计算相应金额并填写，edit.html同理，不过用的很少，就暂时不做了。

文件地址 public\assets\js\backend\your.js

add: function () {
            Controller.api.bindevent();
            console.log('点击了添加按钮');
            // (function(){
            //("#c-money").bind('input porpertychange',function(){
            //         console.log("输入了金额");
            //         let vipmanreseller = document.getElementById("c-vipmanreseller_id").value;
            //         let money = document.getElementById("c-money").value;
            //         let change = document.getElementById("c-change").value;
            //         console.log("分销商："+vipmanreseller);
            //         console.log('变动金额：' + money);
            //         console.log(change);
            //     });
            // });
            ("#c-money").change(function(){
                vipmanreseller = document.getElementById("c-vipmanreseller_id").value;

                if (vipmanreseller<1) {
                    toastr.error("请选择分销商");
                    return false;
                 };

                 change = document.getElementById("c-change").value;
                 console.log(change);

                 money = document.getElementById("c-money").value;

                //查余额.ajax({
                    url:'/api/vip/tools/yourapiname?userid=' + vipmanreseller,
                    type:'GET',
                    success:(res)=>{
                        console.log(res);
                        if (1 > res) {
                            toastr.success("查询余额失败或需要核实");
                            return false;
                        }

                        console.log('修改金额');

                        if (change == '增加' || change == '充值') {
                            //这里需要转化一下字符串为浮点数，不然就是字符串相加了
                            aftermoney = parseFloat(money) + parseFloat(res);

                        }else if(change == '减少'){
                            aftermoney = res - money;
                        }

                        document.getElementById("c-beforemoney").value = res;
                        document.getElementById("c-aftermoney").value = aftermoney;
                        toastr.success("计算成功，请核实！");
                    },
                    error:(res)=>{
                        console.log('false');
                        toastr.error("获取余额失败，请核实!");
                    }
                });

//                console.log(vipmanreseller);
            });
        },