vue el-select可多选可单选 选择全部后不能选择其他；其他可多选_lixiaohua66的博客_elselect多选

<el-select size="middle" clearable v-model="form.ground"  @change="handlePlat" placeholder="请选择小组" filterable multiple  style="width: 400px;">
  <el-option label="全部" value="全部"></el-option>
  <el-option v-for="(item, index) in groundList" :key="index" :label="item.name" :value="String(item.id)" :disabled="item.disabled"></el-option>
</el-select><el-select size="middle" clearable v-model="for