为什么我看到自动完成的API调用，但是没有下拉列表？

 <textarea rows="1" cols="250" class="ng-scope ng-valid ng-not-empty ng-dirty ng-valid-editable ng-touched"
    autocomplete="off" ng-model="order.data.supplierOrganization.shortName" ng-keypress="typeSupplier($event)"
    typeahead-on-select="updateSupplier($item)"
    typeahead="supplier as supplier.shortName for supplier in suppliers | filter:{shortName:$viewValue}"></textarea>

使用的模块-角度1.7.8

 angular.module('home',['ui.bootstrap','ngSanitize','ngAria','ngAnimate','ngMaterial']);