iview DatePicker 限制只能选本月

HTML：

<FormItem label="活动时间" prop="activity_time">
                    <DatePicker
                      v-model="addForm.activity_time"
                      @on-change="param.activity_time=$event"
                      type="date"
                      format="yyyy-MM-dd"
                      :options="options"
                      placeholder="活动时间"
                      style="width: 214px"
                      :disabled="modalDisable"
                    ></DatePicker>
                  </FormItem>

JS:

options: {
        disabledDate(date) {
          let dateTime = new Date();
          let currentYear = dateTime.getFullYear();
          let currentMonth = dateTime.getMonth();
          let monthFirstDay = new Date(currentYear, currentMonth, 1);

          let newMonth = ++currentMonth;
          let newYear = currentYear;
          if (newMonth >= 12) {
            newMonth -= 12;
            newYear++;
          }
          let nextMonthFirst = new Date(newYear, newMonth, 1);
          let nonthLastDay = new Date(
            nextMonthFirst.getTime() - 24 * 60 * 60 * 1000
          );
          return (
            date.valueOf() < new Date(monthFirstDay).getTime() ||
            date.valueOf() > new Date(nonthLastDay).getTime()
          );
        }
      } //时间范围限制

扩展：
一些时间格式的转换与时间的获取

var myDate = new Date();  
myDate.getYear(); //获取当前年份(2位)  
myDate.getFullYear(); //获取完整的年份(4位,1970-????)  
myDate.getMonth(); //获取当前月份(0-11,0代表1月)         // 所以获取当前月份是myDate.getMonth()+1;   
myDate.getDate(); //获取当前日(1-31)  
myDate.getDay(); //获取当前星期X(0-6,0代表星期天)  
myDate.getTime(); //获取当前时间(从1970.1.1开始的毫秒数)  
myDate.getHours(); //获取当前小时数(0-23)  
myDate.getMinutes(); //获取当前分钟数(0-59)  
myDate.getSeconds(); //获取当前秒数(0-59)  
myDate.getMilliseconds(); //获取当前毫秒数(0-999)  
myDate.toLocaleDateString(); //获取当前日期  
var mytime=myDate.toLocaleTimeString(); //获取当前时间  
myDate.toLocaleString( ); //获取日期与时间  

JS获取当前时间戳的方法-JavaScript 获取当前毫秒时间戳有以下三种方法

var timestamp =Date.parse(new Date());    结果：1280977330000       //不推荐; 毫秒改成了000显示  
 
var timestamp =(new Date()).valueOf();       结果：1280977330748       //推荐;   
 
var timestamp=new Date().getTime();         结果：1280977330748        //推荐;  

限制只能选本月以及以后的

disabledDate(date) {
          let nowTime = new Date();
          let month = nowTime.getMonth() + 1;
          let year = nowTime.getFullYear();
          if (month - 1 == 0) {
            year = year - 1;
            month = 12;
          }
          return date && date.valueOf() < (new Date(`${year}-${month}`) - 28800000);
 },

参考
https://blog.csdn.net/zwt_guiji/article/details/80258944