element-ui的日期选择器，某日之前不可选，某日之后不可选

<el-date-picker id="salesDate" :editable="false" :picker-options="pickerOptionLater" value-format="yyyy/MM/dd" type="date" format="yyyy/MM/dd" v-model="salesOrders.salesDate" size="small" style="width:100%"></el-date-picker>
pickerOptionLater是在data的return里面定义的。

pickerOptionLater: {

    disabledDate(time) {

        var date = new Date('2018-06-30 24:00:00:000')

        var thatDay = date.getTime()

        return time.getTime() < thatDay

    }

}