ElementUI+VUE 在使用ElementUI日期选择器时大于当前月份的日期不可选，默认日期

1，月份选择器，大于当前月份的日期不可选

pickerOptions: { //大于当前月分的日期不可选
                    disabledDate: (time) => {
                        var date = new Date();
                        var year = date.getFullYear();
                        var month = date.getMonth() + 1;
                        if (month >= 1 && month <= 9) {
                            month = "0" + month;
                        }
                        var currentdate = year.toString()  + month.toString();

                        var timeyear = time.getFullYear();
                        var timemonth = time.getMonth() + 1;
                        if (timemonth >= 1 && timemonth <= 9) {
                            timemonth = "0" + timemonth;
                        }
                        var timedate = timeyear.toString() + timemonth.toString();
                        return currentdate < timedate;
                    }
                },

2，日期选择器，小于当前日期不可选

pickerOptions: {
                    disabledDate(time) {
                        return time.getTime() < Date.now();
                    }
                },

3，月份选择器，时间段选择，添加开始月份默认为当月的钱前三个月（例如2019-02），结束月份为当前月份（例如2019-05）

//默认月份
            defaultDate(){
                let _this = this;
                //获取新的时间(2019.4.12）
                let date = new Date()
                //获取当前时间的年份转为字符串
                let endYear = date.getFullYear().toString()   //'2019'
                let staYear = endYear
                //获取月份，由于月份从0开始，此处要加1，判断是否小于10，如果是在字符串前面拼接'0'
                let staMonth = 0
                let endMonth = date.getMonth()+1 < 10 ? '0'+(date.getMonth()+1).toString():(date.getMonth()+1).toString()  //'04'
                if(date.getMonth()+1 == 1){
                    staYear = (date.getFullYear()-1).toString()
                    staMonth = (12).toString()
                }else {
                    staMonth = date.getMonth() < 10 ? '0'+(date.getMonth()).toString():(date.getMonth()).toString()  //'04'
                }
                //字符串拼接，开始时间，结束时间
                let end = endYear +  endMonth   //当月2019-04 
                let beg = staYear + staMonth    //当月减3 2019-01
                _this.formInline.startMonth=beg
                _this.formInline.endMonth=end //将值设置给插件绑定的数据
            },