1.只能选择当前及以后的日期

<el-date-picker
       v-model="value1"
       type="date"
       :picker-options="pickerOptions">
</el-date-picker>

 data() {
        return {
            pickerOptions: {
                disabledDate(time) {
                    return time.getTime() < Date.now() - 8.64e7;
                }
            },
}

2.只能选择今天以及今天以前的日期

data (){
   return {
       pickerOptions: {
          disabledDate(time) {
            return time.getTime() > Date.now() - 8.64e6
          }
        }, 
   }    
}

3.只能选择今天之后的日期

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

4.只能选择今天之前的日期

data (){
   return {
       pickerOptions0: {
          disabledDate(time) {
            return time.getTime() > Date.now();
          }
        },  
   }     
}

5.设置选择三个月之前到今天的日期

data (){
   return {
       pickerOptions0: {
          disabledDate(time) {
            let curDate = (new Date()).getTime();
            let three = 90 * 24 * 3600 * 1000;
            let threeMonths = curDate - three;
            return time.getTime() > Date.now() || time.getTime() < threeMonths;;
          }
        }, 
   }    
}

组件代码

<el-date-picker
       v-model="value1"
       type="date"
       placeholder="开始日期"
       :picker-options="pickerOptions0">
</el-date-picker>
<el-date-picker
       v-model="value2"
       type="date"
       placeholder="结束日期"
       :picker-options="pickerOptions1">
</el-date-picker>