el-date-picker日期组件

<el-date-picker v-if="isEdit" v-model="vmFormContent.BeginDate "
                                type="date"
                                value-format="yyyy-MM-dd"
                                :picker-options="pickerBeginDate"
                                placeholder="">
</el-date-picker>

pickerBeginDate: {
                        disabledDate(time) {
                            let day = new Date().getDay() + 1;                            
                            //当前日期为5号（含）之后只能选择本月１号含之后
                            if (day >= 5) {
                                return time.getTime() < new Date().getTime() - day * 24 * 60 * 60 * 1000;
                            } else { //当前日期为4号（含）之后，可选择上月１号（含）之后
                                //当前日期减去一个月
                                let lastDate = moment().subtract(1, ‘months‘)
                                return time.getTime() < lastDate - day * 24 * 60 * 60 * 1000;
                            }
                        },
                    }