el-date-picker报错Prop being mutated“placement“解决方法

解决方法：在组件加上 align=“center”

         <el-date-picker
              size="mini"
              v-model="times"
              type="daterange"
              range-separator="至"
              start-placeholder="开始日期"
              end-placeholder="结束日期"
              value-format="yyyy-MM-dd"
              :editable="false"
              @change="dateChange"
              align="center"
            >
         </el-date-picker>