Elementui el-autocomplete下拉框宽度设置

 <el-autocomplete v-model='challengeId' popper-class="el-autocomplete-suggestion"  :popper-append-to-body="false":fetch-suggestions="querySearchItem" @select="handleSelect"></el-autocomplete>

<style scoped lang='scss'>
::v-deep .el-autocomplete-suggestion {
  width: auto!important;
}
</style>

需要在标签上添加 popper-class 和 :popper-append-to-body 这两个属性