[vue]vue+element 日期控件只能选择今天及之前

<el-form-item label="按月查询：">
            <el-date-picker 
              style="width:100%"
              v-model="value3"
              type="month"
              placeholder="选择月"
              @change='monthChange()'
              :picker-options="pickerOptions0"
            >
            </el-date-picker>
          </el-form-item>

<script>
  export default{
    data(){
      return{
       pickerOptions0:{
        disabledDate(time){
           return time.getTime() > Date.now() - 8.64e6;
        }
      },
    }
  }
}
</script>

return time.getTime() < Date.now() - 8.64e7;

return time.getTime() > Date.now() - 8.64e6;