Vue dynamic class name

 <el-select v-model="classFilter" :options="classFilterOptions" clearable filterable multiple 
 :class="{
    
    
 'mpks-visual-filter-error-individual': classFilterError,
 'mpks-visual-class-filter-short-input':classFilter.length > 0}" 
  popper-class="mpks-common-select-checkbox-option" 
  @visible-change="closeClassFilterError">